CN102981348B - Filter light source module for optical image capture device and the image capture device - Google Patents

Abstract

The invention provides a filter light source module for an optical image capturing device and the image capturing device, wherein the filter light source module is arranged at a light inlet of the optical image capturing device and comprises a hollow sleeve, a light-emitting unit, a filter and a non-thread assembling unit. The hollow sleeve is formed with a front end, a rear end, an inner surface and an outer surface; the light-emitting unit is arranged on the inner surface of the hollow sleeve, the filter is arranged between the light inlet of the hollow sleeve and the light-emitting unit, and the filter capable of being assembled and disassembled quickly is formed by the threadless assembling unit, so that the convenience in use is improved.

Description

Filter light source module for optical image capture device and the image capture device

【Technical field】

The invention relates to a light source module, in particular to a light source module with a filter.

【Background technique】

Macro imaging is mainly used to capture images of tiny things that cannot be observed by ordinary camera lenses or magnifying glasses. In the early years, it was mainly used in ecological observation and scientific research of animals and plants. Recently, it is mostly used in cosmetic medicine, industrial inspection, criminal identification or anti-counterfeiting identification. , such as: metal welding wire quality inspection, fingerprint identification, anti-counterfeiting identification of banknotes, and even detection of fluorescent proteins in body fluids to find blood or body fluids.

Among them, non-destructive detection is an indispensable detection method in industrial detection or criminal identification. Non-destructive testing includes fluorescence detection and phosphorescence detection, etc. Fluorescence detection can also be used to detect scratches and cracks on the metal surface that are difficult to distinguish with the naked eye, and measure the size of the cracks. Generally, the fluorescent dye is sprayed on the outer layer of the object to be detected, so that the dye penetrates into the cracks, and then irradiated by light sources such as ultraviolet light, and an appropriate filter is used for observation or photography. The filters and light sources used in traditional fluorescence detection are separated. Users need to choose different types of filters and corresponding light sources according to different detection objects, which is extremely inconvenient to use.

As for criminal identification, usually at the scene of the crime, the forensic officer holds a UV lamp in one hand to illuminate fingerprints or bloodstains, and then holds a camera to take photos under the UV light source, and also takes photos under the normal light source for cross-comparison . Sometimes it needs to be carried out by two people. Not only is it inconvenient, but it is also possible that the two photos do not correspond completely due to the replacement of the light source or the addition or removal of filters in front of the camera, which reduces the quality of the evidence.

Usually in this kind of short-distance photography, due to the direct irradiation of ultraviolet light, the intensity of fluorescence reaction is usually much lower than the intensity of directly reflected ultraviolet light. Therefore, it is especially necessary to install ultraviolet filters to improve the signal/noise ratio and obtain For accurate fluorescent image data, the general filter is currently formed with a standard-sized internal thread on the front of the lens, and the filter is screwed with the lens by using an external thread. On the contrary, once you want to obtain comparison data and change the photo light source to natural light, you must remove the ultraviolet filter. However, as mentioned above, when the object to be photographed is only a few centimeters away from the lens, you must reach out within a few centimeters. Unscrewing the filter is inconvenient on the one hand, and on the other hand, it is easier to change the shooting conditions due to the removal of the filter. When the shooting distance is only a few centimeters, a slight change in the distance may distort the comparison photos.

Furthermore, if an image capture device such as a microscope is used, if the photographing and supplementary light are separated into two completely independent mechanisms, during the photographing operation, no matter the angle of the supplementary light or the change of the light source and photographing conditions, Quite inconvenient; and because of its high sensitivity, even a slight touch may completely deviate from the original focus position, not to mention the violent action of rotating the filter to remove it. Therefore, how to make use of convenient tools to enable physicians in aesthetic medicine, technicians in industrial testing, and criminal identification and investigation personnel to obtain evidence (such as fingerprint collection) or data for research and judgment conveniently and reliably in the shortest possible time becomes a problem. An important link in the development of optical equipment.

To sum up, the present invention provides an improved optical image capture device, which not only integrates the light-emitting unit for supplementary light with the image capture device, but also allows the filter to be easily disassembled and assembled, so as to facilitate single-use Human shooting works, not only does not need to use extra manpower, but also makes it more convenient and feasible to change the lighting conditions when taking pictures, and keep capturing images repeatedly at the same location.

【Content of invention】

An object of the present invention is to provide a filter light source module for an optical image capture device, so that the supplementary light emitting unit and the image capture device can be integrated.

Another object of the present invention is to provide a filter light source module with a threadless assembly unit for easy assembly and disassembly of filters, so as to ensure that the original shooting position will not be changed during the filter replacement process.

Another object of the present invention is to provide a filter light source module that can adjust the light emitting direction of the light emitting unit, so that the supplementary light can be correctly focused on the object to be photographed at a short distance.

The present invention proposes a filter light source module for an optical image capture device. The aforementioned optical image capture device has a light entrance, and the filter light source module is installed on the corresponding light entrance of the optical image capture device. , and includes: a hollow sleeve for assembly to the optical image capture device, the hollow sleeve is formed with a front end and a rear end opposite to the front end and corresponding to the aforementioned light entrance, a connecting The inner surface of the front end and the rear end, and an outer surface opposite to the inner surface; a set of light emitting units, including a plurality of light emitting elements arranged on the inner surface and causing the light to be at least partially emitted from the front end; And a filter arranged on the hollow sleeve, between the aforementioned light entrance and the aforementioned light-emitting element.

After the above-mentioned filter light source module is installed in the optical image capture device, on the one hand, the fill light and image shooting can be integrated to facilitate close-range image capture, and the fill light angle can be further adjusted to allow the illuminated object to be correctly compensated. To achieve the best shooting effect, especially through the threadless assembly unit, it is more convenient to disassemble and assemble the filter, so that when shooting with different light sources, other related conditions can be changed as much as possible, thereby greatly improving the use of Convenience, and achieve all the above purposes.

【Description of drawings】

FIG. 1 is a perspective view of a first preferred embodiment of the filter light source module of the present invention applied to an optical image capture device.

FIG. 2 is a schematic cross-sectional view of the embodiment in FIG. 1 .

Fig. 3 is a schematic cross-sectional view of a second preferred embodiment of the present invention, illustrating the structure of a threadless assembly unit.

FIG. 4 is a perspective view of a third preferred embodiment of the present invention, illustrating a filter light source module including an adapter seat.

FIG. 5 is a perspective view of the fourth preferred embodiment of the present invention, illustrating the arrangement of the battery box and the reflector.

FIG. 6 is a perspective view of a fifth preferred embodiment of the present invention, illustrating different light emitting elements in the light emitting unit.

[Description of main component symbols]

Filter light source module 1, 1", 1"" external thread part 10, 10"

Hollow sleeve 11, 11', 11'", 11"" front end 111

Rear end 112 inner surface 113, 113'

Inclined section 1130 outer surface 114, 114', 114""

Symmetry axis 115 light emitting unit 12, 12", 12'"

Switch unit 120"" Light emitting elements 121, 121'"

Drive circuit 122 filters 13, 13'

The first magnetic part 141 of the threadless assembly unit 14, 14'

The second magnetic part 142 pawl piece 143'

Push switch 144' angle adjustment unit 15

Power supply unit 17", 17'" transmission line 171'"

Mirror 18'" Lens 2, 2"

Internal thread part 20, 20" light entrance 21

Body 3, 3”, 3’” Adapter 4”

Thread part 40"

【detailed description】

The aforementioned and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of preferred embodiments with accompanying drawings.

1 and 2 are respectively a perspective view and a schematic cross-sectional view of the first preferred embodiment of the filter light source module of the present invention applied to an optical image capture device. The optical image capture device illustrated here as a monocular camera mainly includes a lens 2 and a body 3 . For the sake of illustration, the light entrance 21 is defined in front of the lens 2 here, and all image beams enter through the light entrance 21 ; the filter light source module 1 of the present invention is therefore installed at the light entrance 21 accordingly. The filter light source module 1 of the present invention also includes a hollow sleeve 11 , a light emitting unit 12 and a filter 13 .

The hollow sleeve 11 is a circular tube, which is not limited to this in actual implementation; the hollow sleeve 11 is formed with a front end 111 opposite to the front end 111 and corresponding to the rear end 112 of the aforementioned light entrance 21, The inner surface 113 connecting the front end portion 111 and the rear end portion 112, and the outer surface 114 opposite to the inner surface 113, for the convenience of description, the so-called inner surface 113 here is not just the inner surface extending along the front and rear direction of the hollow sleeve 11 , but broadly defined from the front end portion 111 to the rear end portion 112. In this example, an external thread portion 10 is further formed on the outer wall surface at the rear end 112 of the above-mentioned hollow sleeve 11, so that the filter light source module 1 can be connected with the standard internal thread at the light entrance of the general camera lens 2. The parts 20 are correspondingly screwed together so as to be compatibly assembled on common optical image capture devices.

The light-emitting unit 12 includes a plurality of light-emitting elements 121 and a driving circuit 122, and in this example, the driving circuit 122 further includes a group of flexible circuit boards in the bent part; as mentioned above, the inner surface 113 in this example is Near the front end 111, a step-shaped inclined section 1130 is formed, and the light-emitting element 121, which is illustrated as an LED, is installed on this inclined section 1130, so that after being activated by the driving circuit 122, the direction of light emission is consistent with the hollow space. The direction of the sleeve 11 is inclined, and it is mainly emitted from the front end 111, thereby focusing on a fixed short distance, such as eight centimeters in front of the lens, and, because the focused light spot has a certain depth of focus, such as five centimeters to five centimeters in front of the lens. Between twelve centimeters, there is a supplementary light area, and supplementary lighting can be obtained.

Since the light-emitting element 121 in this example is, for example, eight light-emitting diodes as an example, and the design of four white LEDs and four ultraviolet LEDs are interlaced with each other, so that the photographer can smoothly switch from ultraviolet light to white light and directly change the lighting. The wavelength is used for comparison and taking pictures. In particular, the LED is used as the light-emitting unit. Because the power consumption is relatively low, the area to be photographed can be illuminated for a long time without being limited to the use of general flashlights. Of course, those familiar with the technical field can easily understand that the light-emitting diode of this example can also be an organic light-emitting diode (Organic Light-Emitting Diode, referred to as OLED) or even a laser diode, which does not hinder the implementation of the present invention. . The light-emitting diodes above can also be installed with components of different central wavelengths according to market demand. For items with infrared or ultraviolet marks, choose to install infrared or ultraviolet light to match different substances.

Furthermore, in the embodiment of the present invention, the hollow sleeve 11 has a symmetry axis 115 passing through the hollow sleeve 11, and the above-mentioned inner surface 113 includes an inclined section 1130 which forms an angle with the symmetry axis 115, and the above mentioned The light-emitting diodes are respectively arranged on the inclined section 1130, so the light-emitting surface of each light-emitting element 121 is slightly inclined towards the inclined section 1130; then, the filter light source module 1 further includes a set of angle adjustment The angle adjustment unit 15 is represented by a pivot in the present invention, so the illumination angle of each light emitting element 121 can be accurately changed by further precise adjustment of the pivot angle.

That is to say, the light emitted by the light emitting element 121 can generate a low-angle light source or a coaxial light source relative to the symmetry axis 115 of the hollow sleeve 11 . At this time, the low-angle light source is almost parallel to the surface of the object, and only the divergent light beam outside the main luminous angle is used as supplementary light, so as to avoid the strong light directly reflected by the surface of the illuminated object, and the optics that can be diffusely reflected from the surface of the object Image, highlighting subtle features on the surface of the illuminated object, such as dust, bumps, scratches, or other defects, or highlighting slight height changes on the surface of the object, such as etching, welding seams, or embossing; therefore, low-angle light sources are suitable for Provide the detection light source of the optical image capture device when detecting the edge of the object and the scratch detection of the smooth surface object, so that the defects on the surface and the edge can be clearly seen.

On the other hand, the coaxial light source directly emits light toward the subject to effectively illuminate the subject. The characteristics of the coaxial light source allow the light source to cover the entire field of view. All in all, when there is a specific requirement, through the adjustment of the angle adjustment unit 15 , different special effects or specific angle shadow information can be obtained. Of course, as those skilled in the art can easily understand, the light emitting element 121 can still have different configurations.

The filter 13 is disposed between the light entrance 21 of the lens 2 and the light emitting unit 12 of the filter light source module 1 . Next, the function of the filter 13 will be further described in detail, so that we can more easily understand the next technical feature of the present invention. Generally speaking, the main function of the filter 13 is to allow or prohibit the passage of light with specific wavelengths; in other words, light with certain specific wavelengths will be filtered and blocked. In this embodiment, the filter 13 also allows part of the light to be absorbed and cannot pass through; therefore, the above-mentioned filter 13 cooperates with the light emitted by the light emitting unit 12. For example, the light emitted by the light emitting unit 12 is used to excite The observed object emits fluorescence or phosphorescence, and the filter 13 can absorb the strong light (such as ultraviolet light) generated by the light-emitting diode and directly reflected back to the lens, so as to prevent the reflected strong light from covering the fluorescent light to be observed Or phosphorescence, and can allow fluorescent or phosphorescent light of a specific wavelength to enter the light entrance 21 of the lens 2, so as to achieve the effect of being convenient for the user to observe.

The filter light source module 1 further includes a group of threadless assembly units 14 for joining and separating the filter 13 and the hollow sleeve 11. As mentioned above, limited by the short-distance photography applied by the present invention, the object to be photographed It is usually very close to the lens. If the known thread assembly method is used, it is very difficult to disassemble or install the filter by inserting a finger into the distance between the object and the lens of several centimeters, especially during the disassembly process. The shooting position will inevitably be affected change. Therefore, in this example, the first magnetic component 141 arranged on the filter 13 and the second magnetic component 142 on the hollow sleeve 11 are used as the threadless assembly unit 14, and they are magnetically attracted to each other. For example, the former can The N pole faces back, while the latter has the S pole facing forward, and vice versa. Thus, the photographer can easily put the filter 13 into the front of the hollow sleeve 11 with one hand, allowing it to be magnetically positioned smoothly, or reversely peel off the filter 13 from the front of the hollow sleeve 11 to reduce the risk of moving the camera.

FIG. 3 is a schematic cross-sectional view of a second preferred embodiment of the filter light source module of the present invention applied to an optical image capture device. This figure shows another optional threadless assembly unit 14', which includes a pawl piece 143' and a push switch 144', and the above-mentioned pawl piece 143' is installed on the inner surface of the hollow sleeve 11' 113', and the push switch 144' is mounted on the outer surface 114' of the hollow sleeve 11'. When the filter 13' needs to be installed, the operator can send the filter 13' into the catch position of the ratchet part 143', so that it can be easily snapped and fixed at the predetermined position; when the filter needs to be removed 13', the ratchet member 143' can be opened by pressing the push switch 144' that contacts the inside and outside of the ratchet member 143', and the filter 13' can be easily removed.

FIG. 4 is a third preferred embodiment of the present invention. The embodiment in this figure is similar to the embodiment in FIG. 1 above, so the same elements will not be described and labeled again. This figure is a perspective view of an optical image capture device according to another embodiment of the present invention. The difference is that the filter light source module 1" further includes an adapter 4", which is connected to the optical image Between the body 3" of the capture device and the filter light source module 1", the connection between the adapter seat 4" and the filter light source module 1" and the body 3" can be changed to use, for example, magnetic attraction (not shown in the figure) shown), and will not be repeated here. And as shown in this embodiment, the adapter seat 4" can have a perforation through which the lens 2" penetrates, and the inner wall surface of the adapter seat 4" at the perforation also forms a threaded part 40", for the adapter seat 4" and the external threaded portion 10" of the hollow sleeve 11" and the internal threaded portion 20" at the lens 2" are screwed together.

It is worth mentioning that a power supply unit 17" exemplified as an alkaline battery is provided in the above-mentioned adapter base 4", and the power supply unit 17" is installed in the adapter base 4" and electrically connected to the light-emitting unit 12", which is used to provide the power required for the light-emitting unit 12" to emit light, so as to continuously illuminate the area to be photographed for a long time, for continuous observation and then to determine the capture, so that all short-distance image capture is more in line with the requirements.

Fig. 5 is a fourth preferred embodiment of the present invention, wherein, for example, the power unit 17'" of the battery box is connected above the body 3'" of the above-mentioned optical image capture device, and receives the trigger signal of the camera through the transmission line 171 '" enables the light-emitting element to emit light. And in front of the hollow sleeve 11'", there are a plurality of reflectors 18'" corresponding to the LED elements and used for synchronous pivoting. The operator moves the reflector 18 The angle of '" determines the focus position of the light emitting unit 12'".

FIG. 6 is a fifth preferred embodiment of the present invention. The embodiment in this figure is similar to the embodiment in FIG. 1 above, so the same elements will not be described and labeled again. The filter light source module 1"" of the present invention further includes at least two kinds of light emitting diodes whose center wavelengths and light angles of light beams are different from each other. In this example, the white light LED is arranged to directly illuminate the front, and the ultraviolet light LED is arranged to emit light at a low angle. On the outer surface 114"" of the hollow sleeve 11"", there is also a switch unit for controlling each light emitting diode. 120"", so the user can light up different light emitting diodes separately or simultaneously according to the characteristics of the subject to generate a low-angle light source or a coaxial light source; at the same time, the switch unit 120"" also has optional The function of individual light-emitting diodes can be illuminated by only a single LED, so users can leave shadows in a specific direction when taking pictures according to the needs of shooting, so as to clearly distinguish the three-dimensional height of the subject, and increase the user's ability to take pictures The flexibility of choice.

On the other hand, the combination of coaxial light and low-angle light can adapt to the surface of different objects, and the combination of light sources from different angles and quadrants can clearly express the three-dimensional effect of the object. Users can continuously adjust the angle and brightness of the light source when shooting to achieve the best shooting effect.

To sum up, in the filter light source module of the present invention, a light-emitting unit and a filter are arranged on the hollow sleeve at the same time, and the filter is located between the light-emitting unit and the light entrance, which provides the convenience of quick assembly and disassembly, and achieves all of the above purposes.

Although the present invention has been disclosed above with the embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be defined by the scope of the appended patent application.

Claims (10)

1. an optical image acquisition device filter light source module, aforementioned optical image capture unit has a light inlet, and this filter light source module is for being installed in should optical image acquisition device light inlet place, and comprises:

A confession is assembled to the hollow sleeve of this optical image acquisition device, this hollow sleeve is formed with a leading section and one in contrast to this leading section and the rearward end of corresponding aforementioned light inlet, the inside surface of this leading section of connection and rearward end, and an outside surface in contrast to this inside surface;

One group of luminescence unit, comprise plural number be arranged at this inside surface and make its luminous light-emitting component penetrated by this leading section at least partly, the light that wherein this luminescence unit sends is used to excite and is observed thing and sends fluorescence and by this luminescence unit being arranged at this inside surface, form a low angle light source; And

One is arranged at this hollow sleeve, the filter of position between aforementioned light inlet and above-mentioned light-emitting component.

2. filter light source module as claimed in claim 1, more comprise one group this filter and this hollow sleeve be combined and go combine first without thread set order.

3. filter light source module as claimed in claim 2, wherein this is arranged at this filter and this hollow sleeve and first and second magnetic part that magnetic is attracting each other without thread set order first comprising respectively.

4. filter light source module as claimed in claim 2, wherein this comprises without thread set order unit and is arranged at this hollow sleeve inside surface, pallet piece for the above-mentioned filter of blocking, and separate make aforementioned pallet piece and end be exposed to this hollow sleeve outside surface by compressing switch.

5. the filter light source module as described in claim 1,2,3 or 4 wherein this luminescence unit more comprises one drive circuit, and above-mentioned light-emitting component is respectively light emitting diode, and this driving circuit more comprises the flexible circuit board that a slice is arranged for aforementioned light emitting diode.

6. filter light source module as claimed in claim 5, wherein above-mentioned hollow sleeve has the axis of symmetry that runs through this hollow sleeve, and above-mentioned inside surface comprise one section with the tilting section of this symmetrical axle clamp one angle, above-mentioned light emitting diode is arranged at this tilting section respectively, and this filter light source module more comprises the angle regulating unit that a group regulates this tilting section angle.

7. the filter light source module as described in claim 1,2,3 or 4, more comprises the adapter of a linking hollow sleeve to this optical image acquisition device.

8. the filter light source module as described in claim 1,2,3 or 4, more comprises one group and is electrically connected and the power supply unit of this luminescence unit of activation.

9. filter light source module as claimed in claim 5, to be wherein that at least two kinds of institutes are luminous restraint centre wavelength light emitting diode different each other to above-mentioned light-emitting component.

10. an optical image acquisition device, comprising:

A fuselage;

One group of camera lens being arranged at this fuselage, this camera lens has a light inlet; And

One group of filter light source module, this filter light source module is for being installed in should light inlet place, and comprises:

A confession is assembled to the hollow sleeve of this optical image acquisition device, this hollow sleeve is formed with a leading section and one in contrast to this leading section and the rearward end of corresponding aforementioned light inlet, the inside surface of this leading section of connection and rearward end, and an outside surface in contrast to this inside surface;

One group of luminescence unit, comprise plural number be arranged at this inside surface and make its luminous light-emitting component penetrated by this leading section at least partly, the light that wherein this luminescence unit sends is used to excite and is observed thing and sends fluorescence and by this luminescence unit being arranged at this inside surface, form a low angle light source; And

One is arranged at this hollow sleeve, the filter of position between aforementioned light inlet and above-mentioned light-emitting component.