CN112612096A

CN112612096A - Split type lens, assembling method thereof and camera module

Info

Publication number: CN112612096A
Application number: CN201910886675.3A
Authority: CN
Inventors: 梅哲文; 裴海鹏; 蒋伟杰
Original assignee: Ningbo Sunny Opotech Co Ltd
Current assignee: Ningbo Sunny Opotech Co Ltd
Priority date: 2019-09-19
Filing date: 2019-09-19
Publication date: 2021-04-06
Anticipated expiration: 2039-09-19
Also published as: CN112612096B

Abstract

The present application relates to a split lens, an assembling method thereof, and a camera module. The split lens includes: a first lens part and a second lens part including a first optical lens. The second lens portion includes a second lens barrel and at least two second optical lenses. The second lens barrel includes a first carrying part and a second carrying part divided by a carrying structure arranged on the inner side thereof, wherein some of the second optical lenses are mounted on the first carrying part in a positive manner, and the rest of the second optical lenses It is mounted on the second carrying portion in a flip-chip manner. And, the upper surface of the topmost second optical lens is completely exposed to the top of the first bearing portion. In this way, the "lens barrel sky" structure of the first lens part and the second lens part is cancelled, so that the adjustment range of the split lens is wider. Moreover, the split lens has higher assembly efficiency and precision.

Description

Split type lens, assembling method thereof and camera module

Technical Field

The application relates to the field of optical lenses, in particular to a split type lens, an assembling method thereof and a camera module.

Background

In the optical design of the split-type lens, the assembly precision between the lens parts is particularly critical in order to obtain relatively ideal optical parameters. Fig. 1 illustrates a conventional split type lens. As shown in fig. 1, the split type lens includes two lens portions: the lens barrel comprises a first lens part and a second lens part, wherein the first lens part comprises a first lens barrel and a first optical lens mounted in the first lens barrel, and the second lens part comprises a second lens barrel and at least two second optical lenses mounted in the second lens barrel.

For the optical system of the split-type lens, ideally, after the first lens portion is assembled to the second lens portion, the distance between the first optical lens 11 of the first lens portion 1 and the optical zone of the second optical lens 21 located at the topmost side in the second lens portion 2 is relatively determined. However, in an actual production process, the optical lens itself (including the first optical lens 11 and the second optical lens 21 located at the topmost side) is limited by the molding accuracy, and there is a limitation in the assembly accuracy between the optical lens and the lens barrel, resulting in uncertainty in the distance between the first optical lens 11 and the optical zone of the second optical lens 21 located at the topmost side of the second lens portion 2. Therefore, in the assembly process of the split type lens, an adjustment gap needs to be reserved between the first lens portion 1 and the second lens portion 2.

However, in the actual assembly process, the air gap between the light-emitting surface of the first optical lens 11 of the first lens portion 1 and the light-entering surface of the second optical lens 21 located at the topmost side in the second lens portion 2 is relatively small, which affects the adjustable amount of the relative position between the first lens portion 1 and the second lens portion 2. If the air gap is too small, interference between the first lens portion 1 and the second lens portion 2 may occur during the assembly process of the two portions by active alignment.

Also, as shown in fig. 1, in the conventional split type lens, the first lens portion 1 is mounted on the upper surface of the second barrel 22, that is, there is a "zenith" of the second barrel 22 between the first optical lens 11 and the second optical lens 21 adjacent thereto. The existence of the lens cone top surface structure inevitably reduces the adjusting clearance, and influences the adjustment of the split type lens, thereby influencing the lens adjusting quality and the assembling yield.

Further, the "lens barrel zenith" structure has a certain thickness. Therefore, the degree of freedom in designing the second optical lens 21 of the second lens portion 2 is limited on the premise that the adjustment gap is secured as much as possible. In particular, in order to reserve a space for the "tube sky" structure, the structural region of the second optical lens 21 immediately adjacent to the first optical lens 11 needs to be shifted in the lens image side direction. Such a design results in a reduced thickness at the junction between the structured zone and the optical zone of the topmost second optical lens 21, resulting in increased difficulty in molding the topmost second optical lens 21. Such a design also causes the manufacturing tolerance of the surface type and the structural region of the imaging surface of the optical region of the second optical lens 21 to become large, so that the imaging quality of the split lens is degraded.

Also, the "lens barrel zenith" structure raises the mounting base surface of the first optical lens 11 so that the height design of the first optical lens 11 extending upward is affected. It should be understood that the overall height of the optical system of the split-type lens is within a relatively determined range, and the existence of the "lens barrel zenith" structure is equivalent to heightening the mounting base surface of the first lens portion 1, therefore, the height of the first lens portion 1 needs to be reduced to meet the overall height requirement of the optical system.

In summary, there is a need for an improved optical design for a split lens.

Disclosure of Invention

The present disclosure provides a split-type optical lens, an assembling method thereof, and a camera module, wherein a "lens barrel sky surface" structure is not disposed between a first lens portion and a second lens portion of the split-type optical lens, so as to increase an adjustment range of the split-type optical lens during an assembling process.

Another object of the present invention is to provide a split type lens, an assembling method thereof, and an image pickup module, in which a degree of freedom in design of a structural region of a first optical lens of the first lens portion and a second optical lens of a top-most side of the second lens portion is improved since the "lens barrel zenith" structure is not provided. Specifically, the thickness dimension of the structural region of the first optical lens and the second optical lens on the topmost side can be increased, and the second optical lens having such a design is easier to demold, while the first lens portion and the second lens portion have a larger adjustment gap.

Another object of the present invention is to provide a split lens, an assembling method thereof and an image pickup module, wherein the second lens portion includes a second barrel and at least two second optical lenses mounted in the second barrel, wherein an upper surface of the second optical lens at the topmost side is completely exposed to the top of the second barrel, so as to form a structural configuration in which no "barrel crown" is provided at the first and second lens portions.

Another object of the present invention is to provide a split type lens, an assembling method thereof and a camera module, wherein a "lens barrel sky surface" structure is not disposed between a first lens portion and a second lens portion thereof, so that a height difference between an optical area and a structural area of a first optical lens of the first lens portion can be designed to be larger, and when the optical lens is assembled in a through hole of a display screen of a terminal device, the optical area of the first optical lens can be closer to a top of the through hole, so as to obtain a larger field angle and a larger light transmission amount, thereby ensuring that the camera module has higher imaging quality.

Another object of the present invention is to provide a split type lens barrel, an assembling method thereof, and an image pickup module, wherein the second barrel includes a first carrying portion and a second carrying portion divided by a carrying structure provided inside the second barrel, wherein a portion of the second optical lens is mounted on the first carrying portion from a top of the second carrying portion in a face-up manner, and the other portion of the second optical lens is mounted on the second carrying portion from a bottom of the second carrying portion in a face-down manner, so that assembling accuracy and efficiency are improved.

Another object of the present invention is to provide a split lens and an assembling method thereof, and a camera module, wherein the second optical lens located at the bottommost side of the first carrying portion and the second optical lens located at the topmost side of the second carrying portion are mutually embedded, so as to improve the optical axis coaxiality of the first carrying portion and the second carrying portion.

Another object of the present invention is to provide a split type lens barrel, an assembling method thereof and a camera module, wherein the second optical lens attached to the supporting structure in the second supporting portion includes a positioning protrusion protruding upward from a structure region thereof, wherein the positioning protrusion is formed at a specific position of the structure region, so that when the second optical lens attached to the supporting structure is mounted on the second supporting portion, the positioning protrusion is engaged with the supporting structure, thereby improving mounting and positioning accuracy.

Another objective of the present disclosure is to provide a split lens, an assembling method thereof, and a camera module, wherein the first optical transparent portion of the first lens portion includes an optical area and a structural area surrounding the optical area, wherein the optical area includes a protrusion extending beyond the structural area, and when the optical lens is assembled in a terminal device, the protrusion of the first optical lens is fitted in a through hole of a display screen of the terminal device, so that the optical area of the first optical lens can be adjacent to a top of the through hole to obtain a larger angle of view and a larger amount of light transmission, thereby ensuring that the camera module has higher imaging quality.

Another object of the present application is to provide a split lens, an assembling method thereof and a camera module, wherein the protruding portion of the first optical lens has a relatively small lateral dimension, so that an opening of a relatively small-sized display screen is required, thereby improving a "screen occupation ratio" of a terminal device.

Another object of the present invention is to provide a split-type lens, an assembling method thereof and a camera module, wherein the first lens portion is assembled to the second lens portion by active calibration, so as to improve the optical performance and the assembling precision and efficiency of the split-type lens.

Other advantages and features of the present application will become apparent from the following description and may be realized by means of the instrumentalities and combinations particularly pointed out in the appended claims.

To achieve at least one of the above objects or advantages, the present application provides a split type lens including:

a first lens portion including a first optical lens;

the second lens part comprises a second lens barrel and at least two second optical lenses mounted on the second lens barrel, the second lens barrel comprises a lens barrel body and a bearing structure arranged on the inner side of the lens barrel body, the second lens barrel comprises a first bearing part and a second bearing part which are divided by the bearing structure, part of the second optical lenses are mounted on the first bearing part, and the other parts of the second optical lenses are mounted on the second bearing part, and the upper surface of the second optical lens on the topmost side is completely exposed to the top of the first bearing part;

wherein the first lens portion and the second lens portion have an adjustment gap therebetween, and the first lens portion is attached to the second lens portion by an adhesive.

In the split type lens according to the present application, the second bearing portion has an inner diameter increasing from top to bottom, and the other portion of the second optical lens is mounted to the second bearing portion from a bottom of the second bearing portion in a flip-chip manner.

In a split type lens according to the present application, the first bearing portion has an inner diameter increasing from top to bottom, and a part of the second optical lens is mounted to the first bearing portion from a top of the second bearing portion in a front-mount manner.

In a split type lens according to the present application, the first bearing portion has an inner diameter that is uniform from top to bottom, and a part of the second optical lens is mounted to the first bearing portion from a top of the second bearing portion in a front-mount manner.

In the split type lens according to the present application, the bearing structure is integrally formed at an inner side of the lens barrel body.

In the split type lens according to the present application, the bearing structure is a preform and is mounted inside the lens barrel body.

In a lens barrel according to the present application, a glue dispensing space is formed between a sidewall of the second optical lens located at the topmost side in the first carrier part and a sidewall of the first carrier part, the lens barrel further includes an adhesive disposed in the glue dispensing space, the adhesive being used to fix a portion of the second optical lens to the first carrier part.

In a split lens according to the present application, the split lens further includes a positioning member abutting against the second optical lens located at the bottommost side in the second bearing portion, the positioning member being used to fix other portions of the second optical lens to the second bearing portion.

In a split type lens according to the present application, an upper end surface of the first bearing portion is not higher than a half of a height of a structure region of the first optical lens.

In the split type lens according to the present application, the second optical lens abutting against the bearing structure in the second bearing portion includes a positioning protrusion protruding upward from a structural region thereof, wherein the positioning protrusion is formed at a specific position of the structural region, so that the positioning protrusion is engaged with the bearing structure when the second optical lens abutting against the bearing structure is mounted to the second bearing portion.

In the split type lens according to the present application, a part of the second optical lenses among the other parts of the second optical lenses are fitted to each other.

In the split type lens according to the present application, a part of the second optical lenses among the parts of the second optical lenses are fitted to each other.

In the split type lens according to the present application, the second optical lens positioned at the bottommost side in the first bearing part and the second optical lens positioned at the topmost side in the second bearing part are fitted to each other.

In the split type lens according to the present application, a light shielding layer is provided on the non-optical region of the second optical lens located at the topmost side.

In a split type lens according to the present application, the first optical lens includes a structure region and a convex portion protruding upward from the structure region, at least a part of an upper surface of the convex portion forming an optical region of the first optical lens, wherein a highest point of the convex portion protrudes at least 0.3mm to 1.2mm above the upper surface of the structure region.

In the split type lens according to the present application, a lateral dimension of the projection portion is not more than 2.0 mm.

In the split type lens according to the present application, an angle between a side wall of the boss portion and an optical axis set by the split type lens is less than 15 °.

In a split type lens according to the present application, the first optical lens is bonded to a structure region of the second optical lens located at the topmost side by an adhesive.

In a split lens according to the present application, the first lens portion further comprises a first barrel for mounting the first optical lens, wherein the adhesive is applied between the first barrel and the second barrel and/or between the first barrel and a structural region of the second optical lens located at the topmost side and/or between the first optical lens and a structural region of the second optical lens located at the topmost side.

In a split type lens according to the present application, the first optical lens is a plastic lens.

In a split type lens according to the present application, the first optical lens is a glass lens.

In the split type lens according to the present application, the glass lens has a refractive index abbe number of 50 to 71.

In the split type lens according to the present application, the refractive index of the glass lens is 1.48 to 1.55.

According to another aspect of the present application, the present application further provides a camera module, including:

the split lens as described above; and

the split type lens is kept on a photosensitive path of the photosensitive assembly.

In the camera module according to the application, the camera module further comprises a driving element, wherein the driving element is installed on the photosensitive assembly, and the optical lens is installed on the driving element.

According to still another aspect of the present application, there is also provided an assembling method of a split lens, including:

providing a second lens barrel, at least two second optical lenses and a first lens part comprising the first optical lenses, wherein the second lens barrel comprises a first bearing part and a second bearing part which are divided by a bearing structure protrudingly arranged at the inner side of the second lens barrel;

mounting a portion of the second optical lens to the second carrier portion from a bottom thereof in a flip-chip manner from bottom to top;

mounting other parts of the second optical lens on the first bearing part from top to bottom in a front-mounted mode to form a second lens part;

pre-positioning the first lens part, the second lens part and the photosensitive component along the optical axis direction;

adjusting a relative positional relationship between the first lens portion and the second lens portion in an active calibration manner; and

and fixedly arranging the first lens part on the second lens part to form the split type lens.

In the split lens assembling method according to the present application, the second optical lens abutting the bearing structure in the second bearing portion includes a positioning protrusion protruding upward from a structural region thereof;

mounting a portion of the at least second optical lens to the second carrier part from bottom to top in a flip-chip manner from a bottom of the second carrier part comprises:

and mounting the second optical lens attached to the bearing structure on the second bearing part in a manner that the positioning protrusion is clamped with the bearing structure.

Further objects and advantages of the present application will become apparent from an understanding of the ensuing description and drawings.

These and other objects, features and advantages of the present application will become more fully apparent from the following detailed description, the accompanying drawings and the claims.

Drawings

The above and other objects, features and advantages of the present application will become more apparent by describing in more detail embodiments of the present application with reference to the attached drawings. The accompanying drawings are included to provide a further understanding of the embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the drawings, like reference numbers generally represent like parts or steps.

Fig. 1 illustrates a structural schematic view of a conventional split type lens.

Fig. 2 illustrates a schematic diagram of a split type lens according to an embodiment of the present application.

Fig. 3 is a schematic diagram illustrating a modified implementation of the split lens according to an embodiment of the present application.

Fig. 4 is a schematic diagram illustrating still another implementation variation of the split lens according to an embodiment of the present application.

Fig. 5 is a schematic diagram illustrating another variant implementation of the split lens according to an embodiment of the present application.

Fig. 6A to 6C are schematic views illustrating an assembly process of the split type lens according to an embodiment of the present application.

Fig. 7 illustrates a schematic diagram of the split type lens according to an embodiment of the present application being assembled in a terminal device.

Fig. 8 illustrates a schematic diagram of a camera module according to an embodiment of the present application.

Detailed Description

Hereinafter, example embodiments according to the present application will be described in detail with reference to the accompanying drawings. It should be understood that the described embodiments are only some embodiments of the present application and not all embodiments of the present application, and that the present application is not limited by the example embodiments described herein.

Exemplary Split lens and Process for assembling same

As shown in fig. 2, a split type lens 20 according to an embodiment of the present application is illustrated, wherein the split type lens includes a plurality of lens portions. In particular, in the embodiment of the present application, it is exemplified that the split type lens 20 includes two lens portions, that is, the split type lens 20 includes a first lens portion 21 and a second lens portion 22, and the first lens portion 21 is assembled to the second lens portion 22 to form the split type lens 20.

As shown in fig. 2, in the embodiment of the present application, the first lens portion 21 includes a first optical lens 211, and the second lens portion 22 includes a second barrel 222 and at least two second optical lenses 221 mounted in the second barrel 222. Further, the second barrel 222 includes a barrel body 223 and a bearing structure 224 disposed inside the barrel body 223, so that the second barrel 222 is divided into a first bearing portion 225 and a second bearing portion 226 by the bearing structure 224. That is, in the embodiment of the present application, the second barrel 222 includes a first carrying portion 225 and a second carrying portion 226 divided by the carrying structure 224 disposed inside the second barrel 222, wherein a part of the second optical lens 221 is mounted on the first carrying portion 225, and the other part of the second optical lens 221 is mounted on the second carrying portion 226. That is, in the embodiment of the present application, the at least two second optical lenses 221 are divided into two groups of the second optical lenses 221, wherein a first group of the second optical lenses 221 is mounted on the first bearing portion 225, and a second group of the second optical lenses 221 is mounted on the second bearing portion 226.

In particular, in the present embodiment, the bearing structure 224 is integrally formed on the inner side of the lens barrel body 223. That is, in the embodiment of the present application, the carrying structure 224 is a part of the second barrel 222. Of course, in other examples of the present application, the bearing structure 224 may be implemented as a prefabricated member and mounted on the inner side of the lens barrel body 223 by gluing or the like. And is not intended to limit the scope of the present application.

It should be noted that, because of such mounting manner and structural configuration, after the at least two second optical lenses 221 are mounted to the second barrel 222, the upper surface of the second optical lens 221 located at the topmost side is completely exposed to the top of the first bearing portion 225. That is, compared to the conventional split-type lens, in the embodiment of the present application, there is no "lens barrel sky" structure between the first lens portion 21 and the second optical lens 221 adjacent thereto, so that the adjustment range between the first lens portion 21 and the second lens portion 22 is increased.

More specifically, as shown in fig. 2, in the embodiment of the present application, the second carrying portion 226 has an inner diameter that increases from top to bottom, wherein the other portion of the second optical lens 221 is mounted to the second carrying portion 226 from the bottom of the second carrying portion 226 in a flip-chip manner. That is, in the embodiment of the present application, the second bearing portion 226 has a structure with a small top and a large bottom, wherein the other portion of the second optical lens 221 is mounted in the second bearing portion 226 from the bottom of the second barrel 222. Here, the upper direction of the second bearing portion 226 represents a direction in which the second barrel 222 faces the object side, the lower direction represents a direction in which the second barrel 222 faces the image side, and top-down represents a direction from the object side to the image side.

It should be understood that, corresponding to the size change of the second bearing portion 226, in the embodiment of the present application, the diameter of the second optical lens 221 in other portions gradually increases from top to bottom (of course, the case where the diameters of the portions of the second optical lens 221 are equal may also be included). That is, in the second bearing part 226, the diameter of the second optical lens 221 positioned at the upper side is not greater than the diameter of the second optical lens 221 positioned at the lower side. That is, in the present embodiment, in the second carrying portion 226, the second optical lens 221 at the bottommost side has the largest diameter size.

Further, as shown in fig. 2, in the embodiment of the present application, the bearing structure 224 has a downward bearing surface as a positioning and mounting surface for the other portion of the second optical lens 221. In this way, during the process of loading the other part of the second optical lens 221 into the second bearing portion 226 from the bottom of the second barrel 222, firstly, a piece of the second optical lens 221 is gradually inserted into the second bearing portion 226 and finally bears against the bearing surface of the bearing structure 224, and then, the remaining other part of the second optical lens 221 is gradually installed in the second bearing portion 226.

Further, as shown in fig. 2, in the embodiment of the present application, the split type lens 20 further includes a positioning element 227 abutting against the second optical lens 221 located at the bottommost side in the second bearing portion 226, and the positioning element 227 is used for fixing other portions of the second optical lens 221 to the second bearing portion 226. It should be observed that the positioning element 227 abuts against the second optical lens 221 located at the bottommost side in the second carrying portion 226, so as to constrain other portions of the second optical lens 221 between the positioning element 227 and the carrying structure 224. In a specific implementation, the positioning element 227 may be implemented as a pressure ring or the like, and is not limited in this application.

In order to improve the mounting accuracy of the other parts of the second optical lens 221 on the second bearing portion 226, in some examples of the present application, the structure of the second optical lens 221 abutting against the bearing structure 224 in the second bearing portion 226 may be further optimized.

In particular, fig. 3 illustrates a schematic diagram of a variant implementation of the split lens 20 according to an embodiment of the present application. In this variant embodiment, as shown in fig. 3, the second optical lens 221 of the second carrier part 226, which abuts against the carrier structure 224, comprises a positioning projection projecting upwards from its structural area. In particular, the positioning protrusions are formed at specific positions of the structural region, so that when the second optical lens 221 abutting against the bearing structure 224 is mounted on the second bearing portion 226, the positioning protrusions are fittingly engaged with the corner transition region between the bearing surface and the sidewall of the bearing structure 224, in this way, the second optical lens 221 abutting against the bearing structure 224 in the second bearing portion 226 is positioned. It should be understood that, by such a positioning structure, the inclination angle between the second optical lens 221 in the second bearing portion 226, which abuts against the bearing structure 224, and the central axis defined by the second barrel 222 can be effectively reduced, and the assembling precision of the other portions of the second optical lens 221 assembled on the second bearing portion 226 can be improved.

Further, as shown in fig. 2, in the embodiment of the present application, the first carrying portion 225 has an inner diameter increasing from top to bottom, and a part of the second optical lens 221 is mounted to the first carrying portion 225 from the top of the second carrying portion 226 in a front-mount manner. That is, in the embodiment of the present application, the first bearing portion 225 has a structure with a small top and a large bottom, wherein a part of the second optical lens 221 is fitted into the first bearing portion 225 from the top of the second barrel 222. Here, the upper direction of the first bearing portion 225 indicates a direction in which the second barrel 222 faces the object side, the lower direction indicates a direction in which the second barrel 222 faces the image side, and top-down indicates a direction from the object side to the image side.

It should be understood that, corresponding to the size variation of the first bearing portion 225, in the embodiment of the present application, the diameter of part of the second optical lenses 221 is gradually reduced from top to bottom (of course, it may be the case that the diameters of part of the second optical lenses 221 are equal). That is, in the first bearing part 225, the diameter of the second optical lens 221 positioned at the upper side is not smaller than the diameter of the second optical lens 221 positioned at the lower side. That is, in the present embodiment, in the first carrier portion 225, the second optical lens 221 at the bottommost side has the smallest diameter size.

It should be noted that, in other possible implementations of the present application, the first bearing portion 225 may be configured to have a uniform inner diameter from top to bottom, that is, the first bearing portion 225 has a uniform structure, and this is not limited by the present application.

As shown in fig. 6A and 6B, during the process of assembling the second optical lens 221 and the second barrel 222 to form the second lens portion 22, other parts of the second optical lens 221 are preferably mounted on the second bearing portion 226 first, so that during the process of loading part of the second optical lens 221 into the first bearing portion 225 from the top of the second barrel 222, the second optical lens 221 can gradually penetrate into the bottom of the first bearing portion 225 and finally bear against the upper surface of the second optical lens 221, which abuts against the bearing structure 224, in the second bearing portion 226. That is, in the present embodiment, the second optical lens 221 bearing against the bearing structure 224 in the second bearing portion 226 provides a positioning and mounting surface for a part of the second optical lens 221 to be mounted in the first bearing portion 225.

Further, as shown in fig. 2, in the embodiment of the present application, a gap exists between a sidewall of the second optical lens 221 located at the top side in the first carrying portion 225 and a sidewall of the first carrying portion 225 to form a glue dispensing space 2210, wherein the glue dispensing space 2210 is used for applying an adhesive 23, and the adhesive 23 is used for fixing a part of the second optical lens 221 to the first carrying portion 225. Of course, in other examples of the present application, a portion of the second optical lens 221 may be fixed in the first bearing portion 225 by other means, for example, by a press ring, which is not limited by the present application.

It should be noted that in other examples of the present application, a portion of the second optical lens 221 may be mounted on the first carrying portion 225, and another portion of the second optical lens 221 may be mounted on the second carrying portion 226. To implement this assembly, some deformation of the load-bearing structure 224 is required. Specifically, fig. 5 illustrates a schematic diagram of another modified implementation of the split-type lens 20 according to the embodiment of the present application, as shown in fig. 5, in this modified embodiment, the bearing structure 224 has a support seat 2240 extending outward to support and position a portion of the second optical lens 221, which is loaded into the first bearing portion 225 from the top of the second barrel 222, through the support seat 2240; after a portion of the second optical lens 221 is mounted on the first carrying portion 225, another portion of the second optical lens 221 is further mounted on the second carrying portion 226, wherein the second optical lens 221 abutting against the carrying structure 224 abuts against the lower surface of the supporting seat 2240. And is not intended to limit the scope of the present application.

In particular, in order to improve the assembly precision of the second lens portion 22, in the embodiment of the present application, a part of the second optical lenses 221 in the first bearing portion 225 may be configured to be mutually embedded, and of course, a part of the second optical lenses 221 in the other parts of the second optical lenses 221 in the second bearing portion 226 may also be mutually embedded. Particularly preferably, in the embodiment of the present application, the second optical lens 221 positioned at the bottommost side in the first carrying portion 225 and the second optical lens 221 positioned at the topmost side in the second carrying portion 226 may be arranged in a mutually-fitting structure, so that the optical axes of the second optical lens 221 positioned at the bottommost side in the first carrying portion 225 and the second optical lens 221 positioned at the topmost side in the second carrying portion 226 are aligned.

It should be noted that, in the embodiment of the present application, after the at least two second optical lenses 221 are assembled to the second barrel 222 to form the second lens portion 22, a light shielding layer (not shown) may be further disposed on the non-optical area of the second optical lens 221 located at the top side to prevent external stray light from entering. Of course, before assembly, a light shielding layer may be disposed on the non-optical area of the second optical lens 221 located at the top side, which is not limited in this application. It should be noted that in other examples of the present application, the light shielding layer may also be made of other materials. For example, the light shielding layer may be formed by attaching an SOMA sheet to the non-optical region of the first optical lens 211, which is not limited in the present application.

It is worth mentioning that in the embodiment of the present application, the first lens portion 21 is implemented as a "bare lens", that is, the first lens portion 21 includes only the first optical lens 211. In other words, in the embodiment of the present application, when the first lens portion 21 is assembled to the second lens portion 22, the first optical lens 211 of the first lens portion 21 is directly attached to the second lens portion 22, so that the determination of the relative position relationship between the first optical lens 211 and the second optical lens located at the topmost side is more direct, which is beneficial to improving the assembly precision to obtain more ideal optical design parameters. Of course, in other examples of the present application, the first lens portion 21 may further include a first barrel 212 (as shown in fig. 4) for mounting the first optical lens 211, and this is not a limitation of the present application.

It is worth mentioning that in the embodiment of the present application, the upper end surface of the second barrel 222 (i.e., the upper end surface of the first bearing portion 225) may be lower than the highest point of the upper surface of the second optical lens 221 located at the topmost side, or higher than or equal to the highest point of the upper surface of the second optical lens 221 located at the topmost side. However, when the first lens section 21 is implemented as a "bare lens", the upper end surface of the second barrel 222 is not higher than half the height of the structural region of the first optical lens 211 because: in the assembly process of the split type lens, the first optical lens 211 needs to be clamped, and when the first lens portion 21 only includes the first optical lens 211, the height of the structural region of the first optical lens 211 needs to be higher than half of the upper end surface of the second barrel 222, so that the position of the first optical lens 211 relative to the second optical lens 221 located at the topmost side can be adjusted. Moreover, the clamping tool can be clamped at a relatively more middle position of the first optical lens 211, so that damage to the first optical lens 211 caused by the clamping tool is reduced, and the first optical lens 211 is not deformed.

Further, as shown in fig. 2, in the embodiment of the present application, the split type lens 20 has a structural configuration of a "small head". Specifically, in the embodiment of the present application, the first optical lens 211 included in the first lens portion 21 includes a structural region 213 and a protruding portion 214 protruding and extending upward from the structural region 213 to form a structural configuration of a "small head portion". In particular, in the embodiment of the present application, at least a portion of the upper surface of the protruding portion 214 forms the optical zone 212 of the first optical lens 211, where the optical zone 212 represents a portion of the first optical lens 211 participating in the transmitted light imaging, and correspondingly, the non-optical zone of the first optical lens 211 represents a portion of the first optical lens 211 not participating in the transmitted light imaging, which includes the structural zone 213 and a portion of the protruding portion 214 not participating in the transmitted light imaging.

As described above, in the related art, the "tube sky" structure raises the mounting base surface of the first optical lens 11, so that the height design of the first optical lens 11 extending upward is affected. This effect is particularly noticeable when the split lens is assembled to a terminal device (e.g., a smartphone). Specifically, when the split type lens is mounted in the terminal device, the first optical lens 11 of the split type lens needs to be inserted into the screen opening. In order to ensure that the field angle of the split lens is not limited by the screen aperture while reducing the aperture size as much as possible, it is necessary to make the optical zone of the first optical lens 11 more prominent with respect to the non-optical zone. However, the presence of the "tube celestial surface" structure limits the degree of protrusion of the optical zone of the first optical lens 11 relative to the non-optical zone.

Accordingly, in the embodiment of the present application, by the structural configuration of the "small head" of the split lens 20, the optical area 212 of the first optical lens 211 can protrude relatively more than the structural area 213, so that when the split lens 20 is assembled in a terminal device in a manner that the first optical lens 211 is fitted in the through hole of the display screen of the terminal device, the optical area 212 of the first optical lens 211 can be closer to the top of the through hole, so that a larger angle of view and a larger amount of light transmission can be obtained under a smaller screen opening, thereby ensuring that the camera module has higher imaging quality, as shown in fig. 7.

Specifically, in the embodiment of the present application, an included angle between the side wall of the protrusion 214 and the optical axis set by the split lens 20 is less than 15 °. Preferably, in the present embodiment, the side wall is substantially parallel to the optical axis. More preferably, in the embodiment of the present application, the side wall of the protruding portion 214 is substantially perpendicular to the upper surface of the structure region 213 while being substantially parallel to the optical axis, so that the transition region between the protruding portion 214 and the structure region 213 forms an "L" shaped structure. It is worth mentioning that in the implementation, limited by the processing technology, the sidewalls of the protruding portions 214 may not be completely parallel to the optical axis and completely perpendicular to the upper surface of the structure region 213, and the description manner of being substantially perpendicular to and substantially parallel to is adopted for describing the standard of structure design and processing. Preferably, the upper surface of the protrusion 214 is implemented in a convex type.

As described above, in the conventional split type lens, since the "tube sky" structure exists between the first optical lens 211 and the second optical lens 221, the mounting base surface of the first optical lens 211 is too high, resulting in an influence on the height design of the first optical lens 211 extending upward. In contrast, in the embodiment of the present application, the "lens barrel sky" structure is eliminated, and when the height design is performed, the height difference between the optical area 212 and the structure area 213 of the first optical lens 211 can be further increased, so that when the split lens 20 is assembled in a through hole of a display screen of a terminal device, the optical area 212 of the first optical lens 211 can be closer to the top of the through hole, so as to obtain a larger field angle and a larger light transmission amount, thereby ensuring that the camera module has higher imaging quality.

In particular, in the present embodiment, the highest point of the protrusion 214 protrudes at least 0.3-1.2mm above the lower surface of the structural region 213. That is, in the embodiment of the present application, the distance between the highest point of the protruding portion 214 and the upper surface of the structure region 213 is at least 0.3-1.2 mm. Meanwhile, the total height of the first optical lens 211 is 0.4 to 1.6 mm. Preferably, the total height of the first optical lens 211 is 0.9-1.6 mm. And, preferably, the lateral dimension of the boss is not more than 2.0 mm.

To further increase the height difference between the optical zone 212 and the structured zone 213 of the first optical lens 211, in some examples of the present application, the second optical lens 221 at the top side includes a mounting platform (not shown) concavely formed on the upper end surface of the second optical lens 221, and the mounting platform is configured to mount the first optical lens 211 thereon.

In a specific implementation, the first optical lens 211 may be implemented as a plastic lens, which may be injection molded by plastic (or, in some specific processes, the injection molded plastic lens may be further processed by grinding to cut or grind out a desired shape). Of course, in other examples of the present application, the first optical lens 211 may also be implemented as a glass lens, which may be prepared by a molding glass process and may be further cut or ground into a desired shape. In particular, in the embodiment of the present application, the highest point of the convex portion 214 of the first optical lens 211 protrudes from the upper surface of the structure region 213 by a distance of at least 0.3 to 1.2mm, and the total height of the first optical lens 211 is 0.4 to 1.6 mm. That is, the thickness dimension of the first optical lens 211 is relatively high, resulting in a relatively low light transmittance of the first optical lens 211. Therefore, the use of a glass material with higher light transmittance can reduce the influence of the thickness of the first optical lens 211 on the light transmittance.

Specifically, the molding principle of the molded glass is as follows: the glass blank with the initial shape is placed in a precision processing forming die, the temperature is raised to soften the glass, and then the surface of the die is pressed to deform the glass under stress, and the glass is taken out in a split mode, so that the required lens shape can be formed. Since the first optical lens 211 is an aspheric lens and the molded glass needs to be processed by pressing the glass with a mold, the damage to the mold caused by the biconcave lens made of the molded glass is large, and therefore, the upper surface of the first optical lens 211 is preferably a convex surface. Meanwhile, since the molded glass is manufactured by a molding die, a large inclination angle may exist between the side wall of the convex portion 214 of the first optical lens 211 and the optical axis after the molded glass is molded, and at this time, the first optical lens 211 may be ground by a cold working technique, so that the included angle between the side wall of the convex portion 214 of the first optical lens 211 and the optical axis is less than 15 °.

It is noted that, when the first optical lens 211 is implemented as a glass lens, the glass preferably has a refractive index of 1.48 to 1.55 and a refractive index abbe number of 50 to 71. Thus, the split lens 20 has high imaging quality (e.g., well controlling aberrations such as chromatic dispersion within a certain range). Meanwhile, the glass material can have better temperature drift.

Further, in the embodiment of the present application, the first lens portion 21 is assembled to the second lens portion 22 by an Active Optical Alignment (AOA).

Specifically, the assembling process first includes: providing the first lens portion 21 and the second lens portion 22; then, the first lens section 21, the second lens section 22, and the photosensitive member are prepositioned in the optical axis direction; then, further, the relative position relationship between the first lens portion 21 and the second lens portion 22 is adjusted in an active calibration manner; finally, the first lens portion 21 is fixedly arranged on the second lens portion 22 to form the split type lens 20.

In the embodiment of the present application, adjusting the relative positional relationship between the first lens portion 21 and the second lens portion 22 in an active calibration manner includes:

the relative position relationship between the first lens part 21 and the second lens part 22 is adjusted based on the imaging quality of an image acquired by an imaging system formed by the first optical lens 211, the second lens part 22 and a photosensitive component.

Specifically, an image of a target to be measured is acquired by a photosensitive element in cooperation with the split optical lens, and then the molding quality and the adjustment amount of the split lens 20 are calculated by image imaging quality calculation methods such as SFR and MTF. Then, the relative positional relationship between the first lens portion 21 and the second lens portion 22 is adjusted in real time in at least one direction (at least one direction refers to the xyz direction and the directions of rotation about the xyz axis, respectively) according to the adjustment amount, so that the imaging quality (mainly including optical parameters such as peak value, curvature of field, astigmatism, etc.) of the split lens 20 reaches a preset threshold value after one or more adjustments.

In the embodiment of the present application, the first lens portion 21 has a structural configuration of a "bare lens" including only the first optical lens 211. Accordingly, the process of fixing the first lens portion 21 to the second lens portion 22 to form the split type lens 20 includes: first applying an adhesive 23 between the first optical lens 211 and the second optical lens 221 at the topmost side; further, the first lens portion 21 is fixedly attached to the second lens portion 22 by curing the adhesive 23 to fixedly attach the first optical lens 211 to the second optical lens 221 at the topmost side. In particular, in the embodiment of the present application, the adhesive 23 may be cured by thermal curing or photo curing, that is, the adhesive 23 includes a photo-curing component or a thermal curing component. It should be noted that, in the embodiment of the present application, the step of applying the adhesive 23 may also be performed after the active calibration, that is, after the imaging quality correction of the split lens 20 is completed, the first lens portion 21 is removed, and then the adhesive 23 is applied to the corresponding position of the second lens portion 22. And is not intended to limit the scope of the present application.

Accordingly, when the first lens portion 21 is assembled to the second lens portion 22 by active alignment to form the split lens 20, as shown in fig. 2, in the embodiment of the present application, the first optical lens 211 is attached to the upper surface of the second optical lens 221 on the topmost side by an adhesive 23. That is, in the embodiment of the present application, the bonding position of the first lens section 21 and the second lens section 22 is set between the first optical lens 211 and the second optical lens 221 on the topmost side. Of course, in other examples of the present application, the bonding position may be disposed at other positions, for example, between the first optical lens 211 and the second barrel 222; between the first optical lens 211, the second optical lens 221 at the top side, and the second barrel 222, for which, the application is not limited. Also, it is preferable that the adhesive 23 includes a glue material of an opaque material to increase the effect of preventing stray light (which may be caused by external light or light emitted from the display screen itself by refraction or reflection).

It should be understood by those skilled in the art that when the split-type lens 20 is implemented as the split-type lens 20 as illustrated in fig. 4, that is, the first lens portion 21 further includes a first lens barrel 212 for accommodating the first optical lens 211, accordingly, the first lens portion 21 is attached to the second lens portion 22 by an adhesive 23 through an active alignment manner, wherein the bonding position may be disposed between the first lens barrel 212 and the second lens barrel 222, or between the first optical lens 211 and the second optical lens 221 at the top side, or between the first optical lens 211, the second optical lens 221 at the top side, the first lens barrel 212 and the second lens barrel 222. And is not intended to limit the scope of the present application.

In summary, the split type lens and the assembling process thereof based on the embodiment of the present application are clarified, which eliminates the "lens barrel sky" structure of the first lens portion 21 and the second lens portion 22, so that the adjustment range of the split type lens 20 becomes larger on the one hand; on the other hand, the influence (especially, the height design) of the "lens barrel sky" structure on the optical design of the first optical lens 211 is eliminated, so that the optical area 212 of the first optical lens 211 can protrude relatively more than the structural area 213 thereof, so that when the divided type lens 20 is assembled in a terminal device in a manner that the first optical lens 211 is fitted in the through hole of the display screen of the terminal device, the optical area 212 of the first optical lens 211 can be more adjacent to the top of the through hole, so as to obtain a larger angle of view and a larger amount of light transmission.

It is worth mentioning that in other examples of the present application, the optical system of the split lens 20 can be configured in other manners, for example, the first lens portion 21 may include more optical lenses, and the second lens portion 22 may include fewer optical lenses. For example, the first lens portion 21 may include the first optical lens 211 and at least a portion of the second optical lens 221, the second lens portion 22 includes the other remaining second optical lenses 221, and the second optical lens 221 at the topmost side is also exposed to the top of the second lens portion 22.

Also, in other examples of the present application, the split lens 20 further includes a greater number of lens portions. For example, the split lens 20 may include three lens portions: the lens assembly includes a first lens portion 21, a second lens portion 22, and a third lens portion (not shown), and the first lens portion 21, the second lens portion 22, and the third lens portion are assembled in an active calibration manner to ensure assembly accuracy and yield.

Method for assembling schematic split type lens

Fig. 6A to 6C are additional schematic views illustrating an assembly process of the split type lens according to an embodiment of the present application. As shown in fig. 6A to 6C, in the embodiment of the present application, the assembling process of the split type lens 20 includes:

firstly, providing a second barrel 222, at least two second optical lenses 221 and a first lens part 21 including a first optical lens 211, wherein the second barrel 222 includes a first bearing part 225 and a second bearing part 226 divided by a bearing structure 224 protrudingly disposed inside the second barrel 222;

then, a part of the second optical lens 221 is mounted to the second carrying portion 226 from the bottom of the second carrying portion 226 in a flip-chip manner from bottom to top;

then, the other part of the second optical lens 221 is mounted on the first bearing part 225 from top to bottom in a front-mounted manner so as to form a second lens part 22;

then, the first lens section 21, the second lens section 22, and the photosensitive member are prepositioned in the optical axis direction;

then, the relative positional relationship between the first lens portion 21 and the second lens portion 22 is adjusted in an active calibration manner; and

finally, the first lens portion 21 is fixedly arranged on the second lens portion 22 to form the split type lens 20.

In the claimed embodiment, the second optical lens 221 of the second carrier part 226, which abuts the carrier structure 224, comprises a positioning protrusion protruding upwards from its structure region 213. Accordingly, the step of mounting a portion of the second optical lens 221 to the second carrying portion 226 from the bottom of the second carrying portion 226 from bottom to top in a flip-chip manner includes:

the second optical lens 221 abutting against the carrying structure 224 is mounted on the second carrying portion 226 in such a manner that the positioning protrusion engages with the carrying structure 224.

In summary, the assembling method of the split lens 20 based on the embodiment of the present application is illustrated, which can assemble the split lens 20 and the variant implementation thereof as described above.

Schematic camera module

As shown in fig. 8, a camera module according to an embodiment of the present application is illustrated, wherein the camera module 10 includes the split lens 20 and the photosensitive assembly 30 as described above. In a specific application, the camera module 10 can be configured as a front camera module 10 of a terminal device, so as to meet the requirements of a user for self-photographing and the like. In the embodiment of the present application, the terminal device includes, but is not limited to, a smart phone, a tablet computer, a wearable device, and the like. Of course, in other application examples, the camera module 10 may also be configured as a rear camera module, and this is not a limitation of the present application.

In the embodiment of the present application, the camera module 10 includes the split-type lens 20 and the photosensitive element 30, wherein the split-type lens 20 is kept in the photosensitive path of the photosensitive element 30, so that the light collected by the split-type lens 20 can form an image in the photosensitive element 30 along the photosensitive path. It should be understood by those skilled in the art that the photosensitive assembly 30 includes a circuit board 31, a photosensitive chip 32 electrically connected to the circuit board 31, at least one electronic component 32 disposed on the circuit board 31, and a package 33 disposed on the circuit board 31, wherein the split lens 20 is mounted on the package 33 (of course, the photosensitive assembly may also include other necessary elements, such as a filter element, etc.).

It should be noted that, as shown in fig. 8, the camera module 10 is a fixed-focus camera module, and those skilled in the art should know that the camera module 10 related to the present application can also be implemented as a moving-focus camera module, that is, the camera module 10 further includes a driving element (not shown) disposed between the split-type lens 20 and the photosensitive component 30, so that the split-type lens 10 is carried by the driving element to move along the photosensitive path, so as to change the distance between the split-type lens 10 and the photosensitive component 30. Of course, the camera module 10 related to the present application can also be implemented as an optical anti-shake camera module, that is, the camera module 10 further includes an anti-shake motor (not shown) disposed between the split lens 20 and the photosensitive assembly 30, so as to eliminate the influence of unintentional shake on the imaging quality during the shooting process through the anti-shake motor.

In particular, in the embodiment of the present application, the split lens 20 has a structural configuration of "small head" so that when the split lens 20 is assembled in a terminal device in a manner of being embedded in the through hole of the display screen of the terminal device, the optical area 212 of the split lens 20 can be closer to the top of the through hole to obtain a larger angle of view and a larger amount of light transmission, thereby ensuring that the camera module 10 has higher imaging quality, as shown in fig. 7.

It should be noted that, in the camera module as illustrated in fig. 8, although the lens assembly 20 is exemplified by the lens assembly 20 illustrated in fig. 2, it should be understood by those skilled in the art that various modifications and combinations of modifications of the lens assembly 20 disclosed in the present application can be combined with the photosensitive element 30 to form the camera module 10. And is not intended to limit the scope of the present application.

It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.

Claims

1. A split type lens, comprising:

a first lens portion including a first optical lens;

2. The split type lens of claim 1, wherein the second carrying portion has an inner diameter increasing from top to bottom, and other portions of the second optical lens are mounted to the second carrying portion in a flip-chip manner from a bottom of the second carrying portion.

3. A split lens according to claim 2, wherein the first bearing portion has an inner diameter increasing from top to bottom, and a part of the second optical lenses is mounted to the first bearing portion from the top of the second bearing portion in a front-mount manner.

4. The split type lens of claim 2, wherein the first bearing portion has an inner diameter uniform from top to bottom, and a part of the second optical lenses is mounted to the first bearing portion from a top of the second bearing portion in a front-mount manner.

5. The split type lens according to claim 3 or 4, wherein the bearing structure is integrally molded at an inner side of the lens barrel body.

6. The split type lens according to claim 3 or 4, wherein the bearing structure is a preform and is mounted inside the lens barrel body.

7. The split type lens of claim 3 or 4, wherein a glue dispensing space is formed between a sidewall of the second optical lens located at the topmost side in the first carrier part and a sidewall of the first carrier part;

the split type lens further comprises an adhesive arranged in the glue distribution space, and the adhesive is used for fixing part of the second optical lens on the first bearing part.

8. The split lens of claim 2, further comprising: and the positioning element is abutted against the second optical lens positioned at the bottommost side in the second bearing part and is used for fixing other parts of the second optical lens to the second bearing part.

9. A split lens according to claim 3 or 4, wherein the upper end surface of the first bearing portion is not higher than half the height of the structured region of the first optical lens.

10. The split type lens according to claim 2, wherein the second optical lens abutting against the bearing structure in the second bearing portion includes a positioning protrusion protruding upward from a structural region thereof, the positioning protrusion being formed at a specific position of the structural region such that the positioning protrusion is engaged with the bearing structure when the second optical lens abutting against the bearing structure is mounted to the second bearing portion.

11. The split type lens according to claim 2, wherein a part of the second optical lenses among the other parts of the second optical lenses are fitted to each other.

12. The split type lens according to claim 3 or 4, wherein a part of the second optical lenses of the parts of the second optical lenses are fitted to each other.

13. A split lens according to claim 3 or 4, wherein the second optical lens positioned at the bottommost side in the first bearing portion and the second optical lens positioned at the topmost side in the second bearing portion are fitted to each other.

14. The split lens according to claim 1, wherein the first optical lens includes a structure region and a convex portion protruding upward from the structure region, at least a part of an upper surface of the convex portion forming the optical region of the first optical lens, wherein a highest point of the convex portion protrudes at least 0.3mm to 1.2mm above the upper surface of the structure region.

15. A split lens according to claim 14, wherein the lateral dimension of the boss is not more than 2.0 mm.

16. A split lens according to claim 15, wherein an angle between a side wall of the boss and an optical axis set by the split lens is less than 15 °.

17. The split lens of claim 1, wherein the first optical lens is bonded to the structural region of the second optical lens at the topmost side by an adhesive.

18. The split lens of claim 1, wherein the first lens portion further comprises a first barrel for mounting the first optical lens;

an adhesive is applied between the first barrel and the second barrel and/or between the first barrel and a structural region of the second optical lens located at the topmost side and/or between the first optical lens and a structural region of the second optical lens located at the topmost side.

19. The utility model provides a module of making a video recording which characterized in that includes:

a split lens according to any one of claims 1 to 18; and

20. An assembling method of a split lens, comprising:

providing a second lens barrel, at least two second optical lenses and a first lens part comprising the first optical lenses, wherein the second lens barrel comprises a first bearing part and a second bearing part which are divided by a bearing structure convexly arranged at the inner side of the second lens barrel;

21. The method of assembling of claim 20, wherein the second optical lens in the second carrier part abutting the carrier structure comprises a positioning protrusion protruding upward from a structural area thereof;

the step of mounting a portion of the second optical lens to the second carrier part from the bottom thereof in a flip-chip manner from bottom to top includes: