CN211426927U - Eyepiece system and near-to-eye display device - Google Patents
Eyepiece system and near-to-eye display device Download PDFInfo
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- CN211426927U CN211426927U CN202020255334.4U CN202020255334U CN211426927U CN 211426927 U CN211426927 U CN 211426927U CN 202020255334 U CN202020255334 U CN 202020255334U CN 211426927 U CN211426927 U CN 211426927U
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- 239000011521 glass Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 3
- 238000003384 imaging method Methods 0.000 abstract description 28
- 230000004075 alteration Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 210000001747 pupil Anatomy 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
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Abstract
The embodiment of the utility model relates to the technical field of display, in particular to an eyepiece system and a near-to-eye display device, wherein the eyepiece system comprises a first lens, a second lens and a third lens which are coaxially arranged from an object side to an image side in sequence; the object side surface of the first lens is a plane, and the image side surface of the first lens is a convex surface; the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface; the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface. Light rays emitted by the image source are emitted through the object side surface of the first lens, the object side surface of the first lens is a plane, imaging interference at the edge of the image source can be reduced, distortion of an eyepiece system is reduced, and imaging quality is improved. In addition, the object side surface of the second lens is a concave surface, light can be effectively gathered, and the light is collected to the third lens in a short stroke, so that the miniaturization design is facilitated, and the volume and the weight of the eyepiece system are reduced. Finally, the light is refracted and collimated by the third lens and becomes a parallel light beam.
Description
Technical Field
The embodiment of the utility model provides a relate to and show technical field, especially relate to an eyepiece system and near-to-eye display device.
Background
Near-to-eye display is to guide image light emitted from a micro image light source to the pupil of a user through an eyepiece system by an optical technology, to realize a virtual and magnified image in the near-to-eye range of the user, to provide a user with visual image, video or text information, and is widely applied to virtual reality systems, such as intelligent VR wearable devices including head-mounted displays, VR eyes, VR helmets, and the like, and is more popular among people.
The utility model discloses the inventor is realizing the utility model discloses the in-process discovers: at present, an eyepiece system configured in a current near-eye display device comprises a plurality of cemented lenses, so that the optical surface is more, and the structure is complex and bulky.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a main technical problem who solves provides an eyepiece system and near-to-eye display device, and lens are small in quantity, and simple structure can effectively reduce volume and weight.
In order to solve the above technical problem, in a first aspect, an embodiment of the present invention provides an eyepiece system, including:
the lens comprises a first lens, a second lens and a third lens which are coaxially arranged from an object side to an image side in sequence;
the object side surface of the first lens is a plane, and the image side surface of the first lens is a convex surface;
the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface;
the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface.
In some embodiments, the surfaces of the first, second and third lenses are spherical or aspherical.
In some embodiments, the image-side surface and the object-side surface of the first lens are both even-aspheric.
In some embodiments, the image-side surface and the object-side surface of the second lens are both even-aspheric.
In some embodiments, the radii of the first lens, the second lens, and the third lens are each less than or equal to 10 mm.
In some embodiments, the radius of the second lens is greater than the radius of the first lens.
In some embodiments, the radius of the third lens is greater than the radius of the second lens.
In some embodiments, the material of the first lens, the second lens and the third lens is glass or plastic.
In order to solve the above technical problem, a second aspect of the present invention provides a near-eye display device, including: the eyepiece system of first aspect and image source, waveguide piece and above, wherein, the image source set up in the object side direction of eyepiece system, the waveguide piece set up in on the emergent light path of eyepiece system.
In some embodiments, the image source is located on a primary optical axis of the eyepiece system.
The utility model discloses beneficial effect of embodiment: in contrast to the prior art, an eyepiece system provided by an embodiment of the present invention includes a first lens, a second lens, and a third lens coaxially disposed in sequence from an object side to an image side; the object side surface of the first lens is a plane, and the image side surface of the first lens is a convex surface; the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface; the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface. Light rays emitted by the image source are emitted through the object side surface of the first lens, the object side surface of the first lens is a plane, imaging interference at the edge of the image source can be reduced, distortion of an eyepiece system is reduced, and imaging quality is improved. In addition, the object side surface of the second lens is a concave surface, light can be effectively gathered, and the light is collected to the third lens in a short stroke, so that the miniaturization design is facilitated, and the volume and the weight of the eyepiece system are reduced. Finally, the light is refracted and collimated by the third lens and becomes a parallel light beam.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
Fig. 1 is a schematic structural diagram of an eyepiece system according to an embodiment of the present invention;
FIG. 2 is an MTF plot for the eyepiece system shown in FIG. 1;
FIG. 3 is a dot-column diagram of the eyepiece system shown in FIG. 1;
FIG. 4 is a distortion plot of the eyepiece system shown in FIG. 1;
FIG. 5 is an axial chromatic aberration curve for the eyepiece system shown in FIG. 1;
fig. 6 is a schematic structural view of an eyepiece system according to another embodiment of the present invention;
FIG. 7 is an MTF plot for the eyepiece system shown in FIG. 6;
FIG. 8 is a stippled view of the eyepiece system shown in FIG. 6;
FIG. 9 is a distortion plot of the eyepiece system shown in FIG. 6;
FIG. 10 is an axial chromatic aberration curve for the eyepiece system shown in FIG. 6;
fig. 11 is a schematic structural diagram of a near-eye display device according to an embodiment of the present invention.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described in more detail with reference to the accompanying drawings and specific embodiments. It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for descriptive purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Example one
Referring to fig. 1, the eyepiece lens system 100 includes a first lens element 10, a second lens element 20, and a third lens element 30 coaxially disposed in order from an object side to an image side; the object side surface 11 of the first lens element is a plane, and the image side surface 12 of the first lens element is a convex surface; the object side surface 21 of the second lens is a concave surface, and the image side surface 22 of the second lens is a convex surface; the object-side surface 31 of the third lens element is convex, and the image-side surface 32 of the third lens element is convex. Light rays emitted by an image source are emitted through the object side surface 11 of the first lens, the object side surface 11 of the first lens is a plane, imaging interference on the edge of the image source can be reduced, distortion of the eyepiece system 100 is reduced, and imaging quality is improved. In addition, the object side surface 21 of the second lens is concave, so that light can be effectively collected and collected to the third lens 30 in a short stroke, and therefore the miniaturization design is facilitated, and the size and the weight of the eyepiece lens system 100 are reduced. Finally, the light is collimated by the third lens 30 and becomes a parallel light beam.
In this embodiment, the first lens 10, the second lens 20, and the third lens 30 are coaxially disposed, and specifically, a main optical axis of the first lens 10, a main optical axis of the second lens 20, and a main optical axis of the third lens 30 are collinearly disposed. The object side surface 21 of the second lens is a concave spherical surface, the image side surface of the first lens 10 is a convex spherical surface, and the spherical centers of the concave spherical surface and the convex spherical surface are both on the main optical axis. The object side surface 31 of the third lens element and the image side surface 32 of the third lens element are both convex aspheric surfaces, which is beneficial to eliminating aberration, chromatic aberration and distortion and improving imaging quality. It is understood that in some embodiments, the surfaces of the first lens 10, the second lens 20, and the third lens 30 are spherical or aspherical, and can be selected to be spherical for easy machining or spherical for imaging. Optionally, in this embodiment, the image-side surface 32 and the object-side surface 31 of the third lens are both even aspheric surfaces, which is easy to process and has a good imaging effect.
In this embodiment, the radii of the first lens 10, the second lens 20, and the third lens 30 are all less than or equal to 10mm, so that the size of the eyepiece system 100 can be reduced while an image source is imaged. The radius of the second lens 20 is larger than that of the first lens 10, so that all light rays passing through the first lens 10 are converged at the second lens 20, and the edge of an image source is prevented from being lost.
In addition, the radius of the third lens 30 is larger than that of the second lens 20, so that on one hand, all light rays passing through the second lens 20 can be refracted, and on the other hand, the size of the image formation size can be satisfied, so that the image source can be enlarged and imaged. The radiuses of the first lens 10, the second lens 20 and the third lens 30 are sequentially increased to form the hammer-shaped eyepiece system 100, the structure is compact, the interval is small, and the size can be effectively reduced.
In some embodiments, the material of the first lens 10, the second lens 20, and the third lens 30 is glass or resin, wherein the refractive index of glass is higher than that of resin. In this embodiment, the second lens 20 is made of glass, so that the second lens 20 with a high refractive index can better collect light, improve the variable-angle imaging quality, and realize a miniaturized design. In addition, the glass has high processing precision, so that the eyepiece system 100 has smaller sensitivity to tolerance and more stable performance.
In this embodiment, the surface parameters of each lens in the eyepiece system 100 are shown in table 1 below.
TABLE 1 surface parameters of lenses in eyepiece systems
The third lens element 30 is aspheric, and the aspheric conic coefficient values and the aspheric coefficients of each order are shown in table 2 below.
TABLE 2 aspheric conic coefficient values and aspheric coefficients of respective orders for the third lens element
Based on the above structure, the optical performance parameters of the eyepiece lens system 100 are shown in table 3 below.
TABLE 3 optical Performance parameters of eyepiece systems
| EFFL/mm | EPD/mm | Exit pupil distance/mm | FOV/° |
| 13.399 | 4 | 30 | 25 |
As can be seen from table 3, the effective focal length EFFL and the exit pupil distance of the eyepiece system 100 are both small, and the distance between the eye and the image source can be effectively shortened, so that the size of the device using the eyepiece system 100 can be reduced, and the miniaturization design can be realized.
Accordingly, the performance of the eyepiece lens system 100 is tested, fig. 2 is an MTF graph of the eyepiece lens system 100 shown in fig. 1, and as can be seen from fig. 2, the MTF of the eyepiece lens system 100 is greater than 0.2@50lp, i.e., the eyepiece lens system 100 in this embodiment has excellent imaging quality. Fig. 3 is a dot-column diagram of the eyepiece lens system 100 shown in fig. 1, and it can be seen from fig. 3 that the size of the diffuse spot of the eyepiece lens system 100 is small and the imaging effect is good. Fig. 4 is a distortion curve diagram of the eyepiece lens system 100 shown in fig. 1, and it is understood that the maximum distortion value is less than 0.8%, and the imaging effect is excellent. Fig. 5 is an axial chromatic aberration curve of the eyepiece system 100 shown in fig. 1, and it can be seen that the axial chromatic aberration is small and the imaging effect is excellent.
The eyepiece lens system 100 according to the embodiment of the present invention includes a first lens 10, a second lens 20, and a third lens 30 coaxially disposed in order from an object side to an image side; the object side surface 11 of the first lens element is a plane, and the image side surface 12 of the first lens element is a convex surface; the object side surface 21 of the second lens is a concave surface, and the image side surface 22 of the second lens is a convex surface; the object-side surface 31 of the third lens element is convex, and the image-side surface 32 of the third lens element is convex. Light rays emitted by an image source are emitted through the object side surface 11 of the first lens, the object side surface 11 of the first lens is a plane, imaging interference on the edge of the image source can be reduced, distortion of the eyepiece system 100 is reduced, and imaging quality is improved. In addition, the object side surface 21 of the second lens is concave, so that light can be effectively collected and collected to the third lens 30 in a short stroke, and therefore the miniaturization design is facilitated, and the size and the weight of the eyepiece lens system 100 are reduced. Finally, the light is collimated by the third lens 30 and becomes a parallel light beam.
Example two
Referring to fig. 6, fig. 6 is a schematic structural view of another eyepiece system 100 provided by the present invention. In this embodiment, the eyepiece lens system 100 includes a first lens 10, a second lens 20, and a third lens 30 coaxially disposed in order from an object side to an image side; the object side surface 11 of the first lens is a plane, and the image side surface of the first lens is a convex surface; the object side surface 21 of the second lens is a concave surface, and the image side surface 22 of the second lens is a convex surface; the object-side surface 31 of the third lens element is convex, and the image-side surface 32 of the third lens element is convex.
Light rays emitted by an image source are emitted through the object side surface 11 of the first lens, the object side surface 11 of the first lens is a plane, imaging interference on the edge of the image source can be reduced, distortion of the eyepiece system 100 is reduced, and imaging quality is improved. In addition, the object side surface 21 of the second lens is concave, so that light can be effectively collected and collected to the third lens 30 in a short stroke, and therefore the miniaturization design is facilitated, and the size and the weight of the eyepiece lens system 100 are reduced. Finally, the light is collimated by the third lens 30 and becomes a parallel light beam.
In this embodiment, the object-side surface 31 and the image-side surface of the second lens element 20 and the third lens element are aspheric, which is beneficial to eliminating aberration, chromatic aberration and distortion and improving imaging quality. The aspheric surface is an even aspheric surface, so that the processing is easy and the imaging effect is good. Moreover, the radiuses of the first lens 10, the second lens 20 and the third lens 30 are all within the range of 10mm, and are sequentially increased to form the hammer-shaped eyepiece system 100, so that the structure is compact, the interval is small, and the volume can be effectively reduced.
In this embodiment, the surface parameters of each lens in the eyepiece system 100 are shown in table 4 below.
TABLE 4 surface parameters of the lenses of the eyepiece System
The second lens element 20 and the third lens element 30 are aspheric surfaces, and aspheric conic coefficient values and aspheric coefficients of each order are shown in table 5 below.
TABLE 5 aspherical Cone coefficient values and aspherical coefficients of respective orders for the second and third lenses
Based on the above-described structure, the optical performance parameters of the eyepiece system 100 in the present embodiment are shown in table 6 below.
TABLE 6 optical Performance parameters of eyepiece systems
| EFFL/mm | EPD/mm | Exit pupil distance/mm | FOV/° |
| 13.399 | 4 | 30 | 25 |
As can be seen from table 6, the effective focal length EFFL and the exit pupil distance of the eyepiece system 100 are both small, and the distance between the eye and the image source can be effectively shortened, so that the size of the device using the eyepiece system 100 can be reduced, and the miniaturization design can be realized.
Accordingly, the performance of the eyepiece lens system 100 in this embodiment is tested, fig. 7 is an MTF graph of the eyepiece lens system 100 shown in fig. 6, and as can be seen from fig. 7, the MTF of the eyepiece lens system 100 is > 0.2@50lp, i.e., the eyepiece lens system 100 in this embodiment has excellent imaging quality. Fig. 8 is a dot-column diagram of the eyepiece lens system 100 shown in fig. 6, and it can be seen from fig. 8 that the size of the diffuse spot of the eyepiece lens system 100 is small and the imaging effect is good. Fig. 9 is a distortion graph of the eyepiece lens system 100 shown in fig. 6, and it is understood that the maximum distortion value is less than 0.8%, and the imaging effect is excellent. Fig. 10 is an axial chromatic aberration curve of the eyepiece system 100 shown in fig. 6, and it can be seen that the axial chromatic aberration is small and the imaging effect is excellent.
In some embodiments, the eyepiece system 100 further includes a housing (not shown), the housing is provided with an optical channel (not shown) penetrating through the housing, and a first slot (not shown), a second slot (not shown) and a third slot (not shown) connecting the optical channel, central axes of the first slot, the second slot and the third slot are perpendicular to a central axis of the optical channel, the first lens 10 can be inserted into the optical channel from the first slot, the second lens 20 can be inserted into the optical channel from the second slot, and the third lens 30 can be inserted into the optical channel from the third slot, so that the first lens 10, the second lens 20 and the third lens 30 are arranged on the central axis.
Further, eyepiece system 100 also includes a first mount, a second mount, and a third mount. The first fixing member is fixed to a sidewall of the first slot, a first fixing groove (not shown) is formed in a sidewall of the first lens, and when the first lens is inserted into the first slot, the first fixing member is engaged with the first fixing groove, so that the first lens 10 is fixed to the housing. The second fixing member is fixed to a sidewall of the second slot, a second fixing groove (not shown) is formed in a sidewall of the second lens, and when the second lens is inserted into the second slot, the second fixing member is engaged with the second fixing groove, so that the second lens 10 is fixed to the housing. The third fixing member is fixed to a sidewall of the third slot, a third fixing groove (not shown) is formed in a sidewall of the third lens, and when the third lens is inserted into the third slot, the third fixing member is engaged with the third fixing groove, so that the third lens 10 is fixed to the housing. The first fixing piece, the second fixing piece and the third fixing piece have elastic deformation performance, and can be made of rubber, metal elastic sheets and the like.
The eyepiece lens system 100 provided by the present embodiment includes a first lens 10, a second lens 20, and a third lens 30 coaxially disposed in order from an object side to an image side; the object side surface 11 of the first lens element is a plane, and the image side surface 12 of the first lens element is a convex surface; the object side surface 21 of the second lens is a concave surface, and the image side surface 22 of the second lens is a convex surface; the object-side surface 31 of the third lens element is convex, and the image-side surface 32 of the third lens element is convex. Light rays emitted by an image source are emitted through the object side surface 11 of the first lens, the object side surface 11 of the first lens is a plane, imaging interference on the edge of the image source can be reduced, distortion of the eyepiece system 100 is reduced, and imaging quality is improved. In addition, the object side surface 21 of the second lens is concave, so that light can be effectively collected and collected to the third lens 30 in a short stroke, and therefore the miniaturization design is facilitated, and the size and the weight of the eyepiece lens system 100 are reduced. Finally, the light is collimated by the third lens 30 and becomes a parallel light beam.
EXAMPLE III
Referring to fig. 11, an embodiment of the present invention further provides a near-eye display device, including: the eyepiece lens system 100 comprises an image source 200, a waveguide sheet 300 and the eyepiece lens system 100, wherein the image source 200 is arranged in the object side direction of the eyepiece lens system 100, and the waveguide sheet 300 is arranged on the emergent light path of the eyepiece lens system 100. Light emitted from the image source 200 passes through the eyepiece system 100 and becomes parallel light beams, which are then transmitted to human eyes through the waveguide sheet 300. The eyepiece lens system 100 includes a first lens 10, a second lens 20, and a third lens 30 coaxially disposed in order from an object side to an image side; the object side surface 11 of the first lens element is a plane, and the image side surface 12 of the first lens element is a convex surface; the object side surface 21 of the second lens is a concave surface, and the image side surface 22 of the second lens is a convex surface; the object-side surface 31 of the third lens element is convex, and the image-side surface 32 of the third lens element is convex. In some embodiments, the image source 200 is an LCD, OLED, LCOS, DM, or Micro-LED, and is located on the main optical axis of the eyepiece system 100 to facilitate increasing the parallelism of the emergent light. The waveguide sheet 300 may be a geometric array waveguide sheet or a grating waveguide sheet.
Light emitted by the image source 200 is incident through the object side surface 11 of the first lens, and the object side surface 11 of the first lens is a plane, so that imaging interference at the edge of the image source 200 can be reduced, further distortion of the eyepiece system 100 is reduced, and imaging quality is improved. In addition, the object side surface 21 of the second lens is concave, so that light can be effectively collected and collected to the third lens 30 in a short stroke, and therefore the miniaturization design is facilitated, and the size and the weight of the eyepiece lens system 100 are reduced. Finally, the light is refracted and collimated by the third lens 30 to become parallel light beams, and the parallel light beams are transmitted into human eyes through the waveguide sheet 300.
It should be noted that the preferred embodiments of the present invention are described in the specification and the drawings, but the present invention can be realized in many different forms, and is not limited to the embodiments described in the specification, and these embodiments are not provided as additional limitations to the present invention, and are provided for the purpose of making the understanding of the disclosure of the present invention more thorough and complete. Moreover, the above technical features are combined with each other to form various embodiments which are not listed above, and all the embodiments are regarded as the scope of the present invention; further, modifications and variations will occur to those skilled in the art in light of the foregoing description, and it is intended to cover all such modifications and variations as fall within the true spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. An eyepiece system (100), comprising:
a first lens (10), a second lens (20), and a third lens (30) coaxially arranged in order from an object side to an image side;
the object side surface (11) of the first lens is a plane, and the image side surface (12) of the first lens is a convex surface;
the object side surface (21) of the second lens is a concave surface, and the image side surface (22) of the second lens is a convex surface;
an object side surface (31) of the third lens is convex, and an image side surface (32) of the third lens is convex.
2. The eyepiece system (100) of claim 1, wherein the surfaces of the first lens (10), the second lens (20), and the third lens (30) are spherical or aspherical.
3. The eyepiece system (100) of claim 2, wherein the image-side surface and the object-side surface of the first lens (10) are both even-aspheric surfaces.
4. The eyepiece system (100) of claim 3, wherein the image-side surface and the object-side surface of the second lens (20) are both even-aspheric.
5. The eyepiece system (100) of claim 1, wherein the first lens (10), the second lens (20), and the third lens (30) each have a radius of 10mm or less.
6. The eyepiece system (100) of claim 5, wherein a radius of the second lens (20) is larger than a radius of the first lens (10).
7. The eyepiece system (100) of claim 6, wherein a radius of the third lens (30) is greater than a radius of the second lens (20).
8. The eyepiece system (100) of claim 1, wherein the material of the first, second, and third lenses (10, 20, 30) is glass or plastic.
9. A near-eye display device, comprising an image source (200), a waveguide sheet (300) and the eyepiece system (100) of any of claims 1-8, wherein the image source (200) is arranged in an object-side direction of the eyepiece system (100) and the waveguide sheet (300) is arranged in an exit light path of the eyepiece system (100).
10. The near-to-eye display device of claim 9, wherein the image source (200) is located on a main optical axis of the eyepiece system (100).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020255334.4U CN211426927U (en) | 2020-03-03 | 2020-03-03 | Eyepiece system and near-to-eye display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020255334.4U CN211426927U (en) | 2020-03-03 | 2020-03-03 | Eyepiece system and near-to-eye display device |
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| CN211426927U true CN211426927U (en) | 2020-09-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115291383A (en) * | 2022-09-01 | 2022-11-04 | 舜宇光学(中山)有限公司 | Eyepiece lens |
| WO2023092419A1 (en) * | 2021-11-25 | 2023-06-01 | 京东方科技集团股份有限公司 | Optical system and virtual reality device |
-
2020
- 2020-03-03 CN CN202020255334.4U patent/CN211426927U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023092419A1 (en) * | 2021-11-25 | 2023-06-01 | 京东方科技集团股份有限公司 | Optical system and virtual reality device |
| CN115291383A (en) * | 2022-09-01 | 2022-11-04 | 舜宇光学(中山)有限公司 | Eyepiece lens |
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