CN114442203A - Fresnel lens, collimating lens group, light source module and light combining system - Google Patents
Fresnel lens, collimating lens group, light source module and light combining system Download PDFInfo
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- CN114442203A CN114442203A CN202210005491.3A CN202210005491A CN114442203A CN 114442203 A CN114442203 A CN 114442203A CN 202210005491 A CN202210005491 A CN 202210005491A CN 114442203 A CN114442203 A CN 114442203A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/02—Simple or compound lenses with non-spherical faces
- G02B3/08—Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
- G02B27/1006—Beam splitting or combining systems for splitting or combining different wavelengths
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/30—Collimators
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/206—Control of light source other than position or intensity
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/208—Homogenising, shaping of the illumination light
Abstract
The application discloses fresnel lens, collimating mirror group, light source module and close optical system, fresnel lens's profile of tooth cutting face has the orientation the groove face of fresnel lens optical axis, the groove face with contained angle between the optical axis is the angle of inclination, the angle at angle of inclination is 10-25. According to the Fresnel lens, the inclination angle of the groove surface facing to one side of the optical axis in the tooth-shaped cutting surface of the Fresnel lens is optimized, the inclination angle between the groove surface and the optical axis is designed to be 10-25 degrees, and the geometric light effect of the collimating lens group is effectively improved.
Description
Technical Field
The application relates to the technical field of projection, in particular to a Fresnel lens, a collimating lens group, a light source module and a light combining system.
Background
In the light combining system of the projection apparatus, a common lens (e.g., a conventional spherical or aspherical lens) is usually used to collimate the light emitted from the light source. The traditional spherical or aspherical lens not only has general geometric lighting effect, but also has thicker thickness and larger weight, occupies larger space in a light combination system, and influences the assembly of other lens groups in projection equipment.
Disclosure of Invention
An object of this application is to provide a fresnel lens's new technical scheme, can solve the problem that collimating lens geometry light efficiency is general and occupation space is big among the prior art at least.
According to a first aspect of the present application, a fresnel lens is provided, wherein a tooth-shaped cutting surface of the fresnel lens has a groove surface facing an optical axis of the fresnel lens, an included angle between the groove surface and the optical axis is an inclination angle, and the angle of the inclination angle is 10 ° to 25 °.
Optionally, the angle of the tilt angle is 15 ° -20 °
Optionally, the depth of the tooth-shaped groove of the fresnel lens is 0.05-0.08 mm.
According to a second aspect of the present application, there is provided a collimator lens group comprising a first lens, a second lens and a third lens arranged in order in an optical axis direction; the first lens, the second lens and the third lens are all fresnel lenses in the above embodiments.
Optionally, the first fresnel surface of the first lens is adjacent to the second lens.
Optionally, the second fresnel surface of the second lens is adjacent to the third lens.
Optionally, the third fresnel surface of the third lens is distal to the second lens.
Optionally, the effective focal length of the first lens is 3-4mm, the effective focal length of the second lens is 2-3mm, and the effective focal length of the third lens is 4-5 mm.
Optionally, the first lens, the second lens and the third lens are all made of plastics.
According to a third aspect of the present application, there is provided a light source module, comprising: a light source; in the above-mentioned embodiment, the collimator set is located on a light path transmission path of the light source.
According to a fourth aspect of the present application, there is provided an optical combining system, comprising an optical combining element and at least one of the light source modules in the above embodiments, wherein the light emitted from the light source module is combined into one emergent light through the optical combining element.
According to a fifth aspect of the present application, there is provided a projection apparatus, which includes the light combining system, the light uniformizing system, the light valve system, and the projection lens described in the foregoing embodiments.
According to the Fresnel lens provided by the embodiment of the invention, the inclination angle between the groove surface and the optical axis is designed to be 10-25 degrees by optimizing the inclination angle of the groove surface facing to the optical axis side in the tooth-shaped cutting surface of the Fresnel lens, so that the geometric light effect of the collimating lens group is effectively improved.
Further features of the present application and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which is to be read in connection with the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and together with the description, serve to explain the principles of the application.
FIG. 1 is a cross-sectional view of a Fresnel lens of the present invention;
FIG. 2 is a schematic diagram of the optical path of the light combining system of the present invention;
fig. 3 is a schematic diagram of the optical path of the projection apparatus of the present invention.
Reference numerals:
a collimating mirror group 100;
a first lens 11; a second lens 12; a third lens 13;
a toothed cutting surface 20; a first fresnel surface 21; a second fresnel surface 22; a third fresnel surface 23; a groove surface 24;
a dichroic prism 30;
a light source 40;
a light uniformizing system 50;
a condenser group 61; a half-wave plate 62; a polarization beam splitter 63; a phase compensator 64; a light valve system 65; a projection lens 66.
Detailed Description
Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
A fresnel lens according to an embodiment of the present invention is described in detail below with reference to the drawings.
Referring to fig. 1, according to the fresnel lens of the embodiment of the invention, the tooth-shaped cut surface 20 of the fresnel lens has a groove surface 24 facing the optical axis of the fresnel lens, and the included angle between the groove surface 24 and the optical axis is an inclined angle, and the inclined angle is 10 ° to 25 °.
In other words, according to the fresnel lens provided by the embodiment of the invention, the fresnel lens can change the refraction angle of the light, correct the light with a large angle, better collimate the light, ensure that other subsequent optical elements in the projection device can better utilize light energy, and improve the overall optical efficiency of the projection device.
A fresnel lens can be understood as a lens that is a common spherical or aspherical lens that is compressed and folded in the optical axis direction, and can be ideally equivalent to a common spherical or aspherical lens, while having a thinner size and a lighter weight.
Fresnel lens is in the actual production manufacturing process, and the sawtooth structure of profile of tooth cutting face 20 can cause the loss of self geometry light efficiency to a certain extent, hardly when reducing volume, weight, can also compromise the light efficiency.
In the fresnel lens of the present application, the groove surface 24 facing the optical axis in the tooth-shaped cut surface 20 is an inactive area, and the surface of the tooth-shaped cut surface 20 facing away from the optical axis is an active area. Stray light formed by the inactive area can affect the imaging quality of the fresnel lens.
Therefore, the structure of the Fresnel lens is improved. As shown in fig. 1, the tooth-shaped cutting surface 20 of the fresnel lens is a fresnel surface, the tooth-shaped cutting surface 20 has a groove surface 24 facing the optical axis of the fresnel lens, an included angle between the groove surface 24 and the optical axis is an inclined angle, and the angle θ of the inclined angle is designed to be 10-25 °, so that secondary refraction of light can be effectively reduced, and the geometric light effect of the fresnel lens can be ensured to be more than 70%.
Optionally, the angle of the tilt angle of the fresnel lens is 15 ° -20 °. The inclination angle between the groove surface 24 and the optical axis is designed to be 15-20 degrees, so that secondary refraction of light rays can be further reduced, and the geometric light effect of the Fresnel lens can reach about 72 percent.
According to the embodiment of the invention, the depth of the tooth-shaped groove of the Fresnel lens is 0.05-0.08 mm.
That is, referring to fig. 1, the depth H of the tooth-shaped groove of the tooth-shaped cut surface 20 of the fresnel lens is processed to 0.05-0.08 mm. Theoretically, the smaller the depth of the tooth-shaped groove is, the better the depth of the tooth-shaped groove is, the depth H of the tooth-shaped groove of the tooth-shaped cutting surface 20 of the Fresnel lens is reasonably designed, optionally, the depth H of the tooth-shaped groove of the Fresnel lens is processed into 0.05mm, and meanwhile, the geometric light effect of the Fresnel lens can reach about 72% by combining the inclination angle theta within the range of 10-25 degrees.
In summary, according to the fresnel lens of the embodiment of the present invention, by optimizing the inclination angle of the groove surface 24 facing the optical axis side in the tooth-shaped cut surface 20 of the fresnel lens, the inclination angle between the groove surface 24 and the optical axis is designed to be 10 ° -25 °, which effectively improves the geometric light efficiency of the collimating lens group 100.
According to a second aspect of the present application, there is provided a collimating lens group 100 comprising a first lens 11, a second lens 12 and a third lens 13 arranged in order in an optical axis direction. The first lens 11, the second lens 12 and the third lens 13 are all fresnel lenses in the above embodiments.
That is, as shown in fig. 1 to 3, the collimator lens group 100 according to the embodiment of the present invention is mainly composed of a first lens 11, a second lens 12, and a third lens 13 arranged in order in the optical axis direction. The first lens 11, the second lens 12 and the third lens 13 are all fresnel lenses in the above embodiments. The collimating lens group 100 of the present application can be applied to projection devices, AR optical machines, and other devices. Through the collimating mirror group 100 that adopts three fresnel lens to constitute, can change the angle of refraction of light, revise wide-angle light, be favorable to carrying out the collimation to light better, improve the geometric lighting effect of collimating mirror group 100 to about 72%, guarantee that other follow-up optical elements can utilize light energy better among the projection arrangement, improve projection arrangement's whole optical efficiency.
In some embodiments of the invention, the first fresnel surface 21 of the first lens 11 is adjacent to the second lens 12. The second fresnel surface 22 of the second lens 12 is adjacent to the third lens 13. The third fresnel surface 23 of the third lens 13 is remote from the second lens 12.
Specifically, referring to fig. 2, the side of the first lens 11 away from the first fresnel surface 21 is a plane, which ensures that more light enters the first lens 11. The second fresnel surface 22 of the second lens 12 and the third fresnel surface of the third lens 13 are both arranged on the side remote from the first lens 11. The second lens 12 and the third lens 13 may have an aspherical surface on a side close to the first lens 11, and the aspherical surface may be designed as a polynomial aspherical surface, for example, an even-order aspherical surface. The aspheric design of the second lens 12 and the third lens 13 can change the refraction angle of light, correct the light with large angle, facilitate better collimation of the light, facilitate better utilization of light energy by subsequent optical elements, and improve the geometric light effect of the projection device to more than 70%.
In the present application, light rays pass through the first lens 11 and then enter the aspheric surface side of the second lens 12, and exit from the fresnel surface side of the second lens 12 to the aspheric surface side of the third lens 13, and finally exit from the fresnel surface side of the third lens 13, so that collimation of the light rays is achieved, and the light energy utilization rate is improved. Through the reasonable arrangement of the first lens 11, the second lens 12 and the third lens 13, the layout of the collimating lens group 100 and other optical structures in the projection device can be better satisfied, and the occupied space of the collimating lens group 100 in the projection device is reduced.
According to one embodiment of the present invention, the effective focal length of the first lens 11 is 3-4mm, the effective focal length of the second lens 12 is 2-3mm, and the effective focal length of the third lens 13 is 4-5 mm. The first lens 11, the second lens 12 and the third lens 13 are all made of plastic.
That is, in the collimating lens group 100 of the present invention, the first lens 11, the second lens 12 and the third lens 13 are all configured as fresnel lenses, so that the effective focal length of the first lens 11 is 3-4mm, the effective focal length of the second lens 12 is 2-3mm, and the effective focal length of the third lens 13 is 4-5 mm. The first lens 11, the second lens 12 and the third lens 13 are all made of plastic, and optionally, the first lens 11, the second lens 12 and the third lens 13 may be made of cycloolefin plastic, which has high transparency, low birefringence, low water absorption rate, good mold processability, and the like. Specifically, the first lens 11, the second lens 12, and the third lens 13 may be formed by processing using PMMA resin or PC resin.
In one embodiment of the present application, as shown in fig. 1 and 2, the depth of the tooth-shaped groove of the tooth-shaped cut surface 20 (i.e., fresnel surface) of the first lens 11 may be 0.08mm, the angle of the inclination angle is 21.9 °, and the effective focal length is 3.69 mm. The depth of the tooth-shaped groove of the tooth-shaped cut surface 20 (i.e., fresnel surface) of the second lens 12 may be 0.08mm, the angle of the inclination angle is 20 °, and the effective focal length is 2.58 mm. The depth of the tooth-shaped groove of the tooth-shaped cut surface 20 (i.e., fresnel surface) of the third lens 13 may be 0.08mm, the angle of the inclination angle is 20 °, and the effective focal length is 4.97 mm.
This application is through adopting three fresnel lens that are made by cyclic olefin plastics to constitute the collimating mirror group 100, can reduce the thickness size (the length size in the optical axis direction) and the weight of collimating mirror group 100, with the collimating mirror group 100 relative ratio that adopts two ordinary lens to constitute, weight reduction 46.1%, guarantee that collimating mirror group 100 is less in the whole length of optical axis direction, and the volume is less, reduces collimating mirror group 100's occupation space. Meanwhile, by optimizing the inclination angle of the groove surface 24 facing the optical axis side in the tooth-shaped cutting surface 20 of the fresnel lens, the inclination angle between the groove surface 24 and the optical axis is designed to be 10-25 °, so that the geometric light effect of the collimating lens group 100 is effectively improved.
In the collimating lens group 100 of the present application, when the first lens 11, the second lens 12 and the third lens 13 are all fresnel lenses, the effect of the tilt angle of the fresnel lenses and the depth of the tooth-shaped grooves on the geometric light effect of the collimating lenses is shown in the following table:
table one:
as shown in Table I, the depth of the tooth-shaped groove should be as small as possible in theory, and when the depth of the tooth-shaped groove is 0 °, 79% of the ideal state can be achieved. When the depth of the tooth-shaped groove is 0.025mm, the manufacturing performance of the Fresnel lens is not satisfied. It can be known from table one that, when the tilt angle of the fresnel lens is 10 to 20 °, the geometric light effect of the collimating lens group 100 can reach more than 67%, and particularly, when the tilt angle of the fresnel lens is 10 to 20 °, the depth of the tooth-shaped groove is 0.05mm, the geometric light effect of the fresnel lens can reach 72.2%, which is very close to the 79% geometric light effect in an ideal state.
Therefore, according to the collimating lens group 100 of the embodiment of the present invention, the first lens 11, the second lens 12 and the third lens 13 all adopt fresnel lenses, so as to reduce the thickness size and the weight of the collimating lens group 100, ensure that the overall length of the collimating lens group 100 in the optical axis direction is small, ensure the volume is small, and reduce the occupied space of the collimating lens group 100. Meanwhile, by optimizing the inclination angle of the groove surface 24 facing the optical axis side in the tooth-shaped cutting surface 20 of the fresnel lens, the inclination angle between the groove surface 24 and the optical axis is designed to be 10-25 °, so that the geometric light effect of the collimating lens group 100 is effectively improved.
According to a third aspect of the present application, there is provided a light source module, comprising: a light source 40; in the above embodiment, the collimating lens group 100 is located on the optical path transmission path of the light source 40.
Specifically, as shown in fig. 2 and 3, the light source module according to the embodiment of the invention mainly includes a light source 40 and a collimator set 100. The light source 40 is used for emitting light, and the light source 40 may be different types of elements capable of generating light beams with different colors, such as an LED (light emitting diode), an OLED (organic light emitting diode), and a laser generator. The collimating lens group 100 is disposed on the optical path transmission path of the light source 40. The light emitted by the light source 40 is collimated by the set of collimating mirrors 100. The collimating lens group 100 collimates the light emitted from the light source 40 in order to receive the wide-angle light emitted from the light source 40. This application is through adopting three collimating mirror group 100 that fresnel lens made by the cycloolefin plastics constitutes, can reduce collimating mirror group 100's thickness size and weight, guarantees that collimating mirror group 100 whole length is less in the optical axis direction, and the volume is less, reduces the occupation space of light source module. Meanwhile, by optimizing the inclination angle of the groove surface 24 facing one side of the optical axis in the tooth-shaped cutting surface 20 of the Fresnel lens, the inclination angle between the groove surface 24 and the optical axis is designed to be 10-20 degrees, secondary refraction of light rays can be effectively reduced, and the geometric light effect of the light source module can reach about 72 percent.
Of course, in the light source module of this application, optical elements such as dichroic prism 30 can also be set up on the light propagation path of collimating mirror group 100, and dichroic prism 30 can reflect the blue light that light source 40 sent, sees through red, green glow simultaneously, improves light source module's application range, also is convenient for rationally arrange each different optical element's position according to the inside space of projection arrangement simultaneously.
According to a fourth aspect of the present application, an optical combining system is provided, which includes an optical combining element and at least one light source module in the above embodiments, wherein light emitted from the light source module is combined into one emergent light through the optical combining element.
That is, the light combining system mainly comprises a light combining element and a light source module, and light emitted by the light source 40 in the light source module is collimated by the collimating lens group 100 and then transmitted to the light combining element. The light combining element can combine the transmission paths of the light beams with different colors collimated by the collimating lens group 100 to form a beam of emergent light.
Since the light source module according to the embodiment of the present invention has the above technical effects, the light combining system according to the embodiment of the present invention should also have corresponding technical effects, that is, in the light combining system according to the embodiment of the present invention, the collimator set 100 composed of three fresnel lenses made of cyclo olefin plastic is adopted, so that the thickness size and weight of the collimator set 100 can be reduced, the collimator set 100 is ensured to have a smaller overall length and a smaller volume in the optical axis direction, and the occupied space of the light combining system is further reduced. Meanwhile, by optimizing the inclination angle of the groove surface 24 facing one side of the optical axis in the tooth-shaped cutting surface 20 of the Fresnel lens, the inclination angle between the groove surface 24 and the optical axis is designed to be 10-25 degrees, secondary refraction of light can be effectively reduced, and the geometric light effect of the light combination system can reach about 75-77 percent.
According to a fifth aspect of the present application, referring to fig. 2 and 3, a projection apparatus is provided, which includes the light combining system, the light uniformizing system 50, the light valve system 65, and the projection lens 66 in the above embodiments. The emergent light after passing through the light combination system can output light spots with uniform sizes after passing through the light uniformizing system 50. The light is homogenized by the light homogenizing system 50, enters the light valve system 65 to be modulated and imaged, and is finally projected by the projection lens 66. This application is through adopting three collimating mirror group 100 that fresnel lens made by the cycloolefin plastics constitutes, can reduce collimating mirror group 100's thickness size and weight, guarantees that collimating mirror group 100 whole length is less in the optical axis direction, and the volume is less, reduces the occupation space of light source module. Meanwhile, by optimizing the inclination angle of the groove surface 24 facing one side of the optical axis in the tooth-shaped cutting surface 20 of the Fresnel lens, the inclination angle between the groove surface 24 and the optical axis is designed to be 10-20 degrees, secondary refraction of light can be effectively reduced, and the geometric light effect of the projection device can reach about 72 percent.
In the present application, the light equalizing system 50 includes a light equalizing element, which may be a fly eye lens (flyyey) or an integrator, and the light may reach the light valve system 65 through the condenser lens set 61, the half-wave plate 62, the polarization beam splitter 63, and the phase compensation plate 64 after being equalized by the light equalizing element, and the light valve system 65 may be an LCOS (Liquid Crystal on silicon), an LCD (Liquid Crystal Display), a DMD (digital micro-mirror) or other reflective spatial light modulators. Finally, the light reflected by the light valve system 65 enters the projection lens 66, so as to realize the projection imaging of the projection device.
Of course, other structures of the projection device and principles thereof will be understood and can be implemented by those skilled in the art, and need not be described in detail in this application.
Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present application. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present application. The scope of the application is defined by the appended claims.
Claims (12)
1. A Fresnel lens is characterized in that a tooth-shaped cutting surface of the Fresnel lens is provided with a groove surface facing an optical axis of the Fresnel lens, an included angle between the groove surface and the optical axis is an inclined angle, and the angle of the inclined angle is 10-25 degrees.
2. Fresnel lens according to claim 1, characterised in that the angle of the tilt angle is 15 ° -20 °.
3. Fresnel lens according to claim 1, characterised in that the depth of the tooth-shaped grooves of the fresnel lens is 0.05-0.08 mm.
4. A collimating lens group is characterized by comprising a first lens, a second lens and a third lens which are sequentially arranged in the optical axis direction; wherein the first lens, the second lens and the third lens are all Fresnel lenses according to any one of claims 1 to 3.
5. The set of collimating lenses of claim 4, wherein the first Fresnel surface of the first lens is adjacent to the second lens.
6. The set of collimating lenses of claim 4, wherein the second Fresnel surface of the second lens is adjacent to the third lens.
7. The set of collimating lenses of claim 4, wherein the third Fresnel surface of the third lens is far away from the second lens.
8. The set of collimating lenses of claim 4, wherein the first lens element has an effective focal length of 3-4mm, the second lens element has an effective focal length of 2-3mm, and the third lens element has an effective focal length of 4-5 mm.
9. The set of collimating lenses of claim 4, wherein the first lens, the second lens and the third lens are all made of plastic.
10. A light source module, comprising:
a light source;
the set of collimating mirrors of any one of claims 4-9, located on an optical path transmission path of the light source.
11. An optical combining system, comprising an optical combining element and at least one light source module according to claim 10, wherein the light emitted from the light source module is combined into an emergent light beam by the optical combining element.
12. A projection apparatus comprising the light combining system, the light unifying system, the light valve system, and the projection lens according to claim 11.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210005491.3A CN114442203A (en) | 2022-01-04 | 2022-01-04 | Fresnel lens, collimating lens group, light source module and light combining system |
| PCT/CN2022/101597 WO2023130679A1 (en) | 2022-01-04 | 2022-06-27 | Fresnel lens, collimating lens group, light source module, and light combination system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210005491.3A CN114442203A (en) | 2022-01-04 | 2022-01-04 | Fresnel lens, collimating lens group, light source module and light combining system |
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| CN114442203A true CN114442203A (en) | 2022-05-06 |
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| CN202210005491.3A Pending CN114442203A (en) | 2022-01-04 | 2022-01-04 | Fresnel lens, collimating lens group, light source module and light combining system |
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| CN (1) | CN114442203A (en) |
| WO (1) | WO2023130679A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023130678A1 (en) * | 2022-01-04 | 2023-07-13 | 歌尔光学科技有限公司 | Collimating lens group, light source module, light combination system and projection apparatus |
| WO2023130679A1 (en) * | 2022-01-04 | 2023-07-13 | 歌尔光学科技有限公司 | Fresnel lens, collimating lens group, light source module, and light combination system |
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| CN114442203A (en) * | 2022-01-04 | 2022-05-06 | 歌尔光学科技有限公司 | Fresnel lens, collimating lens group, light source module and light combining system |
| CN114488499A (en) * | 2022-01-04 | 2022-05-13 | 歌尔光学科技有限公司 | Condenser lens group, illumination system and projection device |
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| JPH07322303A (en) * | 1994-05-19 | 1995-12-08 | Pioneer Electron Corp | Rear projection type projection television |
| CN1925032A (en) * | 2005-09-02 | 2007-03-07 | 鸿富锦精密工业（深圳）有限公司 | Optical module set and optical recording/reproducing device using same |
| JP2010266629A (en) * | 2009-05-14 | 2010-11-25 | Nippon Tokushu Kogaku Jushi Kk | Fresnel lens for solar system and the solar system |
| CN103261943A (en) * | 2010-12-28 | 2013-08-21 | 洛克希德马丁公司 | Head-mounted display apparatus employing one or more fresnel lenses |
| TWM585357U (en) * | 2019-04-29 | 2019-10-21 | 大陸商北京眸合科技有限公司 | Optical system for realizing aerial suspension type display |
| CN209805986U (en) * | 2019-07-22 | 2019-12-17 | 东莞广辰光电科技有限公司 | Projection structure with uniform brightness |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023130678A1 (en) * | 2022-01-04 | 2023-07-13 | 歌尔光学科技有限公司 | Collimating lens group, light source module, light combination system and projection apparatus |
| WO2023130679A1 (en) * | 2022-01-04 | 2023-07-13 | 歌尔光学科技有限公司 | Fresnel lens, collimating lens group, light source module, and light combination system |
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| WO2023130679A1 (en) | 2023-07-13 |
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