CN213686323U - Achromatic collimation light-emitting device and lamp - Google Patents
Achromatic collimation light-emitting device and lamp Download PDFInfo
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- CN213686323U CN213686323U CN202023079311.1U CN202023079311U CN213686323U CN 213686323 U CN213686323 U CN 213686323U CN 202023079311 U CN202023079311 U CN 202023079311U CN 213686323 U CN213686323 U CN 213686323U
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Abstract
本实用新型一种消色差的准直发光装置，包括光源，所述光源发出的光包括第一角度光和发光角大于第一角度光的第二角度光，还包括角度选择装置，所述角度选择装置包括一个出光口，第一角度光朝向出光口发光；还包括消色差透镜组，所述第一角度光由出光口出射后穿过消色差透镜组后出射，所述消色差透镜组包括靠近出光口的第一凹透镜和远离出光口的第一凸透镜，所述第一凹透镜的色散系数小于第一凸透镜的色散系数，第一凸透镜和第一凹透镜紧靠；还包括第二凸透镜，第一角度光依次穿过消色差透镜组、第二凸透镜，最后准直出射，本技术方案通过调整位置调节装置，调节消色差透镜组与光源之间的距离，实现消除由消色差透镜组出射的光的色差。
The utility model relates to an achromatic collimation light-emitting device, comprising a light source, the light emitted by the light source includes a first angle light and a second angle light whose emission angle is greater than the first angle light, and an angle selection device. The angle selection device includes a light outlet, and the first angle light emits light toward the light outlet; it also includes an achromatic lens group, the first angle light is emitted from the light outlet and then passes through the achromatic lens group, and the achromatic lens group is emitted. It includes a first concave lens close to the light outlet and a first convex lens far away from the light outlet, the dispersion coefficient of the first concave lens is smaller than the dispersion coefficient of the first convex lens, and the first convex lens and the first concave lens are close to each other; it also includes a second convex lens, the first An angle of light passes through the achromatic lens group and the second convex lens in turn, and finally exits collimatedly. In this technical solution, the distance between the achromatic lens group and the light source is adjusted by adjusting the position adjustment device, so as to eliminate the light emitted by the achromatic lens group. Color difference of light.
Description
Technical Field
The utility model belongs to the technical field of the lighting technology and specifically relates to, relate to lighting device with achromatism function.
Background
With the development of lighting technology, the lighting technology has become more and more mature. In order to collect and focus light in an illumination device, a convex lens is generally added to an optical path to collect light. Since the convex lens is added, the light emitted from the convex lens may exhibit a dispersion phenomenon. The so-called dispersion phenomenon isA beam of white light parallel to the main optical axis is directed to a thin lens made of glass placed in air (n ≈ 1), and the different wavelengths of light exiting the lens are deflected differently due to the scattering of the light. Refractive index n of red lightL RedRefractive index n less than violet lightL purpleSo that the red light corresponds to the focal length f of the lensRed wineGreater than the focal length f of the lens corresponding to purple lightPurple pigment。
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the weak point of above-mentioned conventional art, to the not enough of prior art, the utility model relates to an achromatic lighting device.
In order to solve the above problems, the utility model adopts the following technical scheme: an achromatic collimated light emitting device comprising a light source emitting light including first angle light and second angle light having an emission angle greater than the first angle light, characterized by: the angle selection device comprises a light outlet, and the first angle light emits light towards the light outlet;
the first angle light is emitted from the light outlet and then passes through the achromatic lens group to be emitted, the achromatic lens group comprises a first concave lens close to the light outlet and a first convex lens far away from the light outlet, the dispersion coefficient of the first concave lens is smaller than that of the first convex lens, and the first convex lens is abutted against the first concave lens;
the first-angle light sequentially passes through the achromatic lens group and the second convex lens and finally is collimated and emitted.
As an improvement of the technical scheme: the angle selection device further comprises a light recovery device, the light recovery device comprises a reflecting surface, the second angle light emits light towards the reflecting surface, and the second angle light returns to the light source after being reflected by the reflecting surface.
As an improvement of the technical scheme: the reflecting surface is arranged around the light outlet, the reflecting surface is a part of a spherical surface, and the light source is positioned at the center of the spherical surface.
As an improvement of the technical scheme: and the position adjusting device is used for adjusting the distance between the achromatic lens group and the light source.
As an improvement of the technical scheme: the first concave lens and the first convex lens are glued together.
As an improvement of the technical scheme: the LED light source is an LED chip which comprises a light emitting area, and a white fence is wound around the light emitting area.
As an improvement of the technical scheme: the light-emitting area and the white enclosure wall are covered with the diaphragm; the diaphragm is provided with a circular light through hole, and the diameter of the light through hole is larger than the side length of the light emitting area and smaller than the length of the diagonal line of the light emitting area.
As an improvement of the technical scheme: the light source is a wavelength conversion device and also comprises a laser light-emitting device for exciting the wavelength conversion device.
As an improvement of the technical scheme: the wavelength conversion device is a transmission type fluorescent sheet, the laser light emitting device emits laser from one side far away from the angle selection device, and the transmission type fluorescent sheet emits fluorescence towards the angle selection device after being excited by the laser; or the laser light emitting device also comprises a reflector, the laser light emitted by the laser light emitting device is twisted by the reflector to excite the wavelength conversion device, the wavelength conversion device is a reflective fluorescent sheet, and the reflective fluorescent sheet emits fluorescence towards the angle selection device after being excited by the laser light.
Due to the adoption of the technical scheme, compared with the prior art, the technical scheme adjusts the distance between the achromatic lens group and the light source by adjusting the position adjusting device, so that the chromatic aberration of the light emitted by the achromatic lens group is eliminated.
The present invention will be further described with reference to the accompanying drawings and the following detailed description.
Drawings
FIG. 1 is a cross-sectional view of an achromatic collimated light emitting device.
Fig. 2 is a schematic structural diagram of an LED chip and a white wall.
Fig. 3 is a schematic structural diagram of an LED chip, a white surrounding wall and a diaphragm.
Fig. 4 is a cross-sectional view of another achromatic collimated light emitting device.
Fig. 5 is a cross-sectional view of another achromatic collimated light emitting device.
Detailed Description
Example 1:
as shown in fig. 1-3, an achromatic collimated light emitting device includes a light source providing a white light mixture of at least two different colors (different wavelengths). In a preferred embodiment, the light source is an LED chip 101a, and the LED chip 101a includes a light emitting region 109. The LED chip 101a is inexpensive and readily available. Since the LED chip 101a is full-angle light emitting, the light emitted from the light emitting region 109 includes first-angle light 121 and second-angle light 122 having a light emission angle larger than the first-angle light 121. Since the light emitted from the LED chip 101a needs to be focused or collimated in practical applications, whether focusing or collimating, the light needs to pass through the achromatic lens group, wherein the second angle light 122 with a large angle cannot be collected by the achromatic lens group, and at this time, the portion of the light which can be collected by the achromatic lens group needs to be selected. In a preferred embodiment, the light source further comprises an angle selection device, the angle selection device comprises a light outlet 102, and the first angle light 121 emits light towards the light outlet 102. The first angle light 121 emitted from the light outlet 102 is light with a light emitting angle meeting the requirement, and the light with a large angle cannot be converged and focused by the achromatic lens group, so the angle selection device selects the first angle light 121 with a small light emitting angle by whether to emit from the light outlet 102.
When a light beam passes through a convex lens, since the convex lens generally consists of two spherical surfaces (or one spherical surface and one flat surface), the refractive index n isLThe lens is placed in a medium with the refractive index n, and under the condition that the included angle between the light rays emitted by an object point and the main optical axis of the lens is small (generally less than 5 degrees), the focal length formula of the thin lens is as follows
Wherein r is1And r2The radii of the two refracting surfaces of the lens are such that light of different wavelengths (light of different colours) has a different nLThe values thus result in different focal lengths f of the light of different wavelengths after passing through the convex lens, and the dispersion phenomenon occurs because the focal lengths f of the light of different wavelengths after passing through the same lens are different. To solve the dispersion phenomenon generated after light passes through a lens. In order to eliminate the dispersion, a preferred embodiment further includes an achromatic lens group, the first angle light 121 is emitted from the light outlet 102, and then passes through the achromatic lens group to emit achromatic light 123, and a light emitting angle of the achromatic light 123 is smaller than a light emitting angle of the first angle light 121. The achromatic lens group of the present embodiment includes a first concave lens 103 close to the light exit 102 and a first convex lens 104 far from the light exit 102, the first concave lens 103 having a smaller abbe number than that of the first convex lens 104, and the first convex lens 104 and the first concave lens 103 are abutted. As can be seen from the optical principle, the smaller the dispersion coefficient, the greater the degree of dispersion. In the present embodiment, the first convex lens 104 functions to converge the first angle light 121, and it can be known from the optical principle that the convergence degree of the first convex lens 104 to the blue light is greater than the convergence degree to the red light; the first concave lens 103 plays a role of diverging the first angle light 121, and it can be known from the optical principle that the divergence degree of the first concave lens 103 to the blue light is larger than that to the red light; because the device finally needs parallel light, in order to enable the achromatic light 123 to be emitted in a collimating way, the technical scheme enables the light emitting angle of the achromatic light 123 to be smaller than that of the first angle light 121, so that the light converging and converging capacity of the first convex lens 104 needs to be larger than the light diverging capacity of the first concave lens 103, and dispersion is caused because the bending capacities of the first concave lens 103 and the first convex lens 104 to light are different. In order to offset the dispersion caused by the converging and converging processes of the first angle light 121 by the first convex lens 104, the dispersion degree of the first concave lens 103 is increased, that is, the dispersion coefficient of the first concave lens 103 is smaller than that of the first convex lens 104.
The achromatic lens group is a combination of the first concave lens 103 and the first convex lens 104, the first angle light 121 is emitted after being diverged and converged, at this time, the converging capability of the achromatic light 123 is insufficient, and the achromatic light 123 cannot be emitted in a collimated manner. In a preferred embodiment, the optical lens further comprises a second convex lens 105, and the first-angle light 121 passes through the achromatic lens group and the second convex lens 105 in sequence and finally is collimated and emitted. In the present embodiment, the second convex lens 105 functions to collimate and emit the achromatic light 123.
As can be seen from the above analysis, the achromatic lens assembly can only collect the first angle light 121 with a small light emitting angle, the LED chip 101a includes the second angle light 122 (large angle light) emitted by the light emitting region 109 and cannot enter the achromatic lens assembly, and at this time, the second angle light 122 cannot be utilized, which causes energy waste and does not meet the requirements of environmental protection and energy saving. In a preferred embodiment, the angle selecting device further includes a light recycling device 106, the light recycling device 106 includes a reflective surface 107, the second angle light 122 emits light toward the reflective surface 107, and the second angle light 122 returns to the light source after being reflected by the reflective surface 107. The light recycling device 106 reflects the second-angle light 122 back to the light emitting region 109 through the reflecting surface 107, and since the light emitting region 109 of the LED chip 101a has a scattering and reflecting effect on the light emitted by itself, the light reflected back to the light emitting region 109 by the reflecting surface is emitted after the light emitting angle is readjusted by the light emitting region 109, and a part of the second-angle light 122 is converted into the first-angle light 121 after the light emitting angle is adjusted by the light emitting region and is emitted from the light emitting opening 102.
As can be seen from the above analysis, the key to the reflective surface 107 for converting the second angle light 122 into the usable first angle light 121 lies in the arrangement of the reflective surface 107, and only by reasonably designing the position and the shape of the reflective surface 107, the second angle light 122 reflected by the reflective surface 107 can be ensured to completely return to the light emitting region 109 of the LED chip 101 a. In a preferred embodiment, the reflecting surface 107 is disposed around the light outlet 102, the reflecting surface 107 is a part of a spherical surface, and the light source is located at the center of the spherical surface. According to the optical principle, when light emitting region 109 is located at the center of the sphere, the light emitted from light emitting region 109 is reflected by the sphere and finally returns to light emitting region 109. Since any light emitted from the optical midpoint light source located at the center of the sphere is reflected by the sphere and then must return to the light-emitting light source, the light-emitting area 109 is a light-emitting area, and does not completely conform to the optical principle. After many experiments by the applicant, it is found that the ratio of the second angle light 122 reflected by the reflective surface 107 returning to the light emitting region 109 gradually increases when the light emitting region 109 moves toward the reflective surface 107, and gradually decreases when a limit value is reached.
In order to meet the use requirements of users, the focal length of the light 124 emitted by the light emitting device needs to be adjusted in the use process of the light emitting device, and the focal length of the light 124 emitted by the light emitting device can be adjusted. A preferred embodiment further comprises a position adjusting device for adjusting the distance between the achromatic lens group and the light source. The position adjusting device comprises an adjusting ring 108, the adjusting ring 108 is fixedly connected with the achromatic lens group, and the achromatic lens group moves along with the adjusting ring 108 when the adjusting ring 108 is moved. The focal length adjustment of achromatic lens groups becomes easier and simpler.
Since the achromatic lens group comprises the first convex lens 104 and the first concave lens 103, in order to achieve achromatic effect during the use of the achromatic lens group, the first convex lens 104 and the first concave lens 103 need to be closely attached together, the change of the distance between the first convex lens 104 and the first concave lens 103 also causes the change of chromatic aberration of the emergent light 124, and in order to reduce the change of chromatic aberration of the emergent light 124, a preferred embodiment is that the first concave lens 103 and the first convex lens 104 are glued together. The first concave lens 103 and the first convex lens 104 are glued into a whole, so that the stability of the achromatic lens group is enhanced, and the focal length adjustment precision is high.
Because the light source in the technical scheme adopts the LED chip 101a, the existing LED chip 101a is mostly rectangular, light spots finally formed by the application of the rectangular LED chip 101a in the technical scheme are images of the LED chip 101a, the light spots are still square, and in the Zhao-Ming field, people hope to obtain round light spots. In a preferred embodiment, as shown in fig. 2, a white fence wall 110 is provided around the light emitting region 109. Since the light emitting region 109 is not a point light source, the second angle light 122 reflected by the reflecting surface 107 returns to the light emitting region 109 and the peripheral region, and at this time, the white enclosing wall 110 surrounds the rectangular light emitting region 109, and the outer contour of the white enclosing wall 110 is made to be circular, which corresponds to a circular light source emitting light, and the finally formed light spot also becomes circular.
The outline of the white enclosing wall 110 is made into a circle, although the spot shape of the emergent light 124 is changed by the method, the difficulty of making the white enclosing wall 110 into the circle is large, and then the luminous area of the luminous zone 109 is increased, and under the condition that the optical power of the light source is not changed, the luminous area is increased according to the conservation of the etendue, the light intensity is weakened, and the method is not wanted. In a preferred embodiment, as shown in fig. 3, the light emitting device further includes a stop 111, where the stop 111 covers the light emitting region 109 and the white surrounding wall 110; the diaphragm 111 is provided with a circular light-passing hole 112, and the diameter of the light-passing hole 112 is larger than the side length of the light-emitting region 109 and smaller than the length of the diagonal of the light-emitting region 109. In order to reduce the influence on the light intensity of the emergent light 124 as much as possible, and on the premise that the emergent light 124 forms a circular light spot, in the technical scheme, a diaphragm 111 provided with a circular through hole 112 is added, the diaphragm 111 covers the light emitting area 109 and the white enclosing wall 110, and the second angle light 122 reflected by the reflecting surface returns to the area of the light emitting area 109 and the white enclosing wall 110 exposed by the through hole 112. In order to not increase the light emitting area of the virtual light source, the area of the through hole 112 cannot be larger than the length of the diagonal line of the light emitting region 109, and in order to ensure that most of the light emitted by the light emitting region 109 can exit from the through hole 112, the diameter of the through hole 112 is larger than the length of the shortest side of the light emitting region 109.
Example 2:
although the LED chip is inexpensive as a light source, it has many disadvantages in illumination of long-distance and high-luminance illumination, and in order to increase the application range of the achromatic collimated light emitting device, it is necessary to use a light source that can be used at a long distance and high luminance. As shown in fig. 4, the achromatic collimated light emitting device includes a laser light emitting device 213 for exciting the wavelength conversion device, and the light source is a wavelength conversion device. The wavelength conversion means is a transmission type fluorescent sheet 201b, the laser light emitting means 213 emits laser light from a side away from the angle selection means, and the transmission type fluorescent sheet 201b emits fluorescent light toward the angle selection means after being excited by excitation emitted from the laser light emitting means 213. The light source is a transmissive fluorescent sheet 201b, and the laser light emitting device 213 excites the transmissive fluorescent sheet 201b to emit light instead of the LED chip. The transmitted phosphor sheet 201b emits light with higher power and higher collimation. The requirement of high-power long-distance illumination is met.
Example 3:
the light source in embodiment 2 is a transmission-type fluorescent sheet, in which laser needs to pass through a transparent heat-conducting substrate to excite a fluorescent material to emit light, and laser loss is certainly caused in the process of passing through the transparent substrate. The reflective fluorescent sheet does not need laser to penetrate through a transparent substrate, so that laser loss is avoided, however, how to guide the laser to the surface of the fluorescent material to excite the fluorescent material is avoided, and a light path is not required to be designed for blocking fluorescent light emitted by the fluorescent material. As shown in fig. 4, the fluorescence angle selecting device further includes a reflecting mirror 314, the wavelength converting device is a reflective fluorescence sheet 301c, the laser light emitted from the laser light emitting device 313 is twisted by the reflecting mirror 314 to excite the reflective fluorescence sheet 301c, and the reflective fluorescence sheet 301c is excited by the laser light to emit fluorescence toward the angle selecting device. Compared with embodiment 2, the position of the reflective fluorescent sheet 301c is still set at the position of the light source, a reflector 314 is added to twist the laser light emitted from the laser light emitting device 313 onto the reflective fluorescent sheet 301c, and the reflector 314 does not block the first-angle light 321 emitted from the reflective fluorescent sheet 301c, so that the spot shape of the emitted light 324 is not affected.
The above detailed description of the embodiments of the present invention is the best mode for carrying out the present invention, and can not be used to limit the protection scope of the present invention. Any equivalent modifications and substitutions for the utility model are within the scope of the protection of the present invention for those skilled in the art.
Claims (10)
1. An achromatic collimated light emitting device comprising a light source emitting light including first angle light and second angle light having an emission angle greater than the first angle light, characterized by: the angle selection device comprises a light outlet, and the first angle light emits light towards the light outlet;
the first angle light is emitted from the light outlet and then passes through the achromatic lens group to emit achromatic light, the achromatic lens group comprises a first concave lens and a first convex lens, the divergence angle of the achromatic light is smaller than that of the first angle light, the dispersion coefficient of the first concave lens is smaller than that of the first convex lens, and the first convex lens is abutted against the first concave lens;
the first-angle light sequentially passes through the achromatic lens group and the second convex lens and finally is collimated and emitted.
2. An achromatic collimated light emitting device according to claim 1, wherein: the angle selection device further comprises a light recovery device, the light recovery device comprises a reflecting surface, the second angle light emits light towards the reflecting surface, and the second angle light returns to the light source after being reflected by the reflecting surface.
3. An achromatic collimated light emitting device according to claim 2, wherein: the reflecting surface is arranged around the light outlet, the reflecting surface is a part of a spherical surface, and the light source is positioned at the center of the spherical surface.
4. An achromatic collimated light emitting device according to claim 1, wherein: and the position adjusting device is used for adjusting the distance between the achromatic lens group and the light source.
5. An achromatic collimated light emitting device according to claim 1, wherein: the first concave lens and the first convex lens are glued together.
6. An achromatic collimated light emitting device according to claim 2, wherein: the LED light source is an LED chip which comprises a light emitting area, and a white fence is wound around the light emitting area.
7. An achromatic collimated light emitting device according to claim 6, wherein: the light-emitting area and the white enclosure wall are covered with the diaphragm; the diaphragm is provided with a circular light through hole, and the diameter of the light through hole is larger than the side length of the light emitting area and smaller than the length of the diagonal line of the light emitting area.
8. An achromatic collimated light emitting device according to claim 1 or 2, wherein: the light source is a wavelength conversion device and also comprises a laser light-emitting device for exciting the wavelength conversion device.
9. An achromatic collimated light emitting device according to claim 8, wherein: the wavelength conversion device is a transmission type fluorescent sheet, the laser light emitting device emits laser from one side far away from the angle selection device, and the transmission type fluorescent sheet emits fluorescence towards the angle selection device after being excited by the laser; or the laser light emitting device also comprises a reflector, the laser light emitted by the laser light emitting device is twisted by the reflector to excite the wavelength conversion device, the wavelength conversion device is a reflective fluorescent sheet, and the reflective fluorescent sheet emits fluorescence towards the angle selection device after being excited by the laser light.
10. A light fixture, characterized by: an achromatic collimated light emitting device comprising any of claims 1 to 9.
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| CN202023079311.1U CN213686323U (en) | 2020-12-21 | 2020-12-21 | Achromatic collimation light-emitting device and lamp |
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| CN202023079311.1U CN213686323U (en) | 2020-12-21 | 2020-12-21 | Achromatic collimation light-emitting device and lamp |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112503416A (en) * | 2020-12-21 | 2021-03-16 | 杨毅 | Achromatic collimation light-emitting device and lamp |
| CN114112791A (en) * | 2021-11-16 | 2022-03-01 | 广州市元奥仪器有限公司 | A portable dual optical path schlieren |
-
2020
- 2020-12-21 CN CN202023079311.1U patent/CN213686323U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112503416A (en) * | 2020-12-21 | 2021-03-16 | 杨毅 | Achromatic collimation light-emitting device and lamp |
| CN112503416B (en) * | 2020-12-21 | 2025-02-11 | 杨毅 | Achromatic collimated light-emitting device and lamp |
| CN114112791A (en) * | 2021-11-16 | 2022-03-01 | 广州市元奥仪器有限公司 | A portable dual optical path schlieren |
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