CN113419299B - Optical lens, optical lens group and projection optical system - Google Patents
Optical lens, optical lens group and projection optical system Download PDFInfo
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- CN113419299B CN113419299B CN202110606628.6A CN202110606628A CN113419299B CN 113419299 B CN113419299 B CN 113419299B CN 202110606628 A CN202110606628 A CN 202110606628A CN 113419299 B CN113419299 B CN 113419299B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B2003/0093—Simple or compound lenses characterised by the shape
Abstract
The invention discloses an optical lens, an optical lens group and a projection optical system. The optical lens includes: a light incident surface and a light emergent surface; the light incident surface and the light emergent surface are respectively arranged on two opposite sides of the optical lens, a concave groove is arranged in the middle of the light incident surface, and light rays are emitted into the optical lens through the concave groove; the light-emitting surface comprises a first cambered surface, the first cambered surface is positioned at the middle position of the optical lens, and the first cambered surface is a concave surface. The technical scheme of the invention can enable the projection equipment to form an effective optical touch area in a short distance, thereby meeting the use requirement of users.
Description
Technical Field
The present invention relates to the field of optical technologies, and in particular, to an optical lens, an optical lens group, and a projection optical system.
Background
With the rapid development of intelligent interactive products, the optical touch technology can install lower projection equipment with less space, and the placement position is more flexible. Therefore, the optical touch technology is receiving more attention as an important input technology. However, the existing projection device is difficult to form an effective optical touch area in a short distance, and cannot meet the use requirement of users.
Disclosure of Invention
Based on this, to solve the problem that the existing projection device is difficult to form an effective optical touch area in a short distance and cannot meet the use requirement of a user, it is necessary to provide an optical lens, an optical lens group and a projection optical system, which aim to make the projection device form an effective optical touch area in a short distance and meet the use requirement of a user.
To achieve the above object, the present invention provides an optical lens comprising: a light incident surface and a light emergent surface;
the light incident surface and the light emergent surface are respectively arranged on two opposite sides of the optical lens, a concave groove is arranged in the middle of the light incident surface, and light rays are emitted into the optical lens through the concave groove;
the light-emitting surface comprises a first cambered surface, the first cambered surface is positioned at the middle position of the optical lens, and the first cambered surface is a concave surface.
Optionally, the light emitting surface further includes a second cambered surface and a third cambered surface, the second cambered surface and the third cambered surface are respectively located at two sides of the first cambered surface and connected to the first cambered surface, and the second cambered surface and the third cambered surface are raised surfaces.
Optionally, the second cambered surface and the third cambered surface are symmetrically arranged on the optical axis of the optical lens.
Optionally, the slope of the first cambered surface gradually decreases from the optical axis position to the edge position, and the slopes of the second cambered surface and the third cambered surface gradually increase from the optical axis position to the edge position.
Optionally, the concave groove includes a first wall surface and a second wall surface, the first wall surface is disposed near the second cambered surface, and the second wall surface is disposed near the third cambered surface.
Optionally, the first wall surface and the second wall surface gradually extend toward the optical axis of the optical lens in the propagation direction of the light.
In addition, in order to achieve the above object, the present invention further provides an optical lens group, the optical lens group including a diffusion lens and the optical lens as described above, the light-emitting surface of the diffusion lens being an arc-shaped surface, the concave groove of the optical lens facing the diffusion lens, light rays passing through the arc-shaped surface of the diffusion lens converging, and a converging focal point being located between the diffusion lens and the optical lens.
Optionally, the diffusion lens and the optical lens are in a cylindrical structure, and an optical axis of the diffusion lens coincides with an optical axis of the optical lens.
Optionally, the diffusion lens is in a cylindrical structure, a side surface of the diffusion lens of the cylindrical structure faces the diffusion lens, and an optical axis of the diffusion lens is orthogonal to an axis of the diffusion lens.
Optionally, the diffusion lens is integrally formed with the optical lens.
Optionally, the optical lens group includes a first collimating lens and a second collimating lens, the first collimating lens and the second collimating lens are disposed on one side of the light incident direction of the diffusion lens, and the light emitting surface of the first collimating lens and the light emitting surface of the second collimating lens are protruded towards the propagation direction of the light.
In addition, in order to achieve the above object, the present invention also provides a projection optical system, which includes an infrared laser source and the optical lens as described above, the infrared laser source being disposed on one side of the light incident surface of the collimator lens group.
In the technical scheme provided by the invention, the optical lens has the function of expanding the emergent angle of emergent rays. After passing through the concave groove of the light incident surface of the optical lens, the light is diffused for the first time. When the light passes through the light emitting surface of the optical lens, the light is subjected to second diffusion. Because the light quantity of optical axis position is more, further diffusion light, first cambered surface sets up to the concave surface. When the light passes through the first cambered surface, the light deflects to two sides. Thus, the light passes through the optical lens and then is diffused twice, and a touch light curtain with a large range is formed rapidly. An effective optical touch area can be formed at a position close to the optical lens, so that the use requirement of a user is met.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an embodiment of an optical lens according to the present invention;
FIG. 2 is a schematic perspective view of the optical lens of FIG. 1;
FIG. 3 is a schematic top view of an optical lens assembly according to the present invention;
FIG. 4 is a schematic perspective view of the optical lens assembly of FIG. 3;
FIG. 5 is a schematic side view of the optical lens assembly of FIG. 3;
FIG. 6 is a schematic view of an optical lens assembly of the present invention;
fig. 7 is a schematic perspective view of the optical lens assembly in fig. 6.
Reference numerals illustrate:
| reference numerals | Name of the name | Reference numerals | Name of the name |
| 110 | First collimating lens | 221b | Second wall surface |
| 120 | Second collimating lens | 222 | Light-emitting surface |
| 210 | Diffusion lens | 222a | First cambered surface |
| 201 | Axis of diffusion lens | 222b | Second cambered surface |
| 211 | Arcuate surface | 222c | Third cambered surface |
| 220 | Optical lens | 30 | Infrared laser source |
| 202 | Axis of optical lens | 310 | Light ray |
| 221 | Concave groove | 40 | Optical axis |
| 221a | A first wall surface |
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, the technical solutions of the embodiments of the present invention may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present invention.
In the related art, a light curtain is projected in a certain planar area by a projection device, and a camera is disposed above the light curtain. When a person clicks on the light curtain, light rays at corresponding positions are shielded, and the positions of the touch control of the person and the hand are judged by shooting the positions of the shielded light rays through the camera, so that corresponding information instructions are determined. However, the existing projection device is difficult to form an effective optical touch area in a short distance, and cannot meet the use requirement of users.
In order to solve the above problems, referring to fig. 1 and 2, the present invention provides an optical lens 220, the optical lens 220 comprising: a light incident surface and a light emergent surface. The light incident surface refers to the light incident surface of the optical lens 220, and the light emitting surface refers to the light emitting surface of the optical lens 220. The light is incident through the light incident surface and is emitted through the light emergent surface.
The light incident surface of the optical lens 220 and the light emergent surface of the optical lens 220 are respectively arranged at two opposite sides of the optical lens, a concave groove 221 is arranged in the middle of the light incident surface, and light rays are emitted into the optical lens 220 through the concave groove 221; the concave groove 221 forms a space for light diffusion propagation. The light is incident into the optical lens 220 through the concave groove 221. The light passes through the concave groove 221 through the first diffusion.
The light-emitting surface 222 of the optical lens 220 includes a first cambered surface 222a, the first cambered surface 222a is located at the middle position of the optical lens 220, and the first cambered surface 222a is a concave surface. The concave groove 221 and the first cambered surface 222a are concave, and when light passes through the surface of the concave groove 221 and the first cambered surface 222a, the light deflects to two sides. The emergent angle of the light is enlarged by deflection of the light on two sides.
In the technical solution proposed in the present embodiment, the optical lens 220 is used for expanding the outgoing angle of the outgoing light. After passing through the concave groove 221 of the light incident surface of the optical lens 220, the light 310 is first diffused. When the light ray 310 passes through the light emitting surface 222 of the optical lens 220, the light ray 310 is second diffused. Since the number of light rays at the position of the optical axis 40 is large, the first cambered surface 222a is provided as a concave surface in order to further diffuse the light rays. When the light passes through the first cambered surface 222a, the light deflects to two sides. Thus, the light 310 passes through the optical lens 220 and then is diffused twice, so that a touch light curtain with a large range is rapidly formed. An effective optical touch area can be formed at a position closer to the optical lens 220, thereby meeting the use requirements of users.
In one embodiment, to ensure that the light 310 is effectively projected out of the light curtain in a designated area. The light-emitting surface 222 of the optical lens 220 further includes a second arc surface 222b and a third arc surface 222c, wherein the second arc surface 222b and the third arc surface 222c are respectively located at two sides of the first arc surface 222a and are connected to the first arc surface 222a, and the second arc surface 222b and the third arc surface 222c are convex surfaces. Specifically, the second cambered surface 222b and the third cambered surface 222c are respectively located at two sides of the first cambered surface 222a, one end of the first cambered surface 222a is connected with the second cambered surface 222b, the other end of the first cambered surface 222a is connected with the third cambered surface 222c, the first cambered surface 222a is concave, and the second cambered surface 222b and the third cambered surface 222c are convex. The second and third cambered surfaces 222b and 222c extend smoothly from the first cambered surface 222 a. The light ray 310 is relatively concentrated in the middle position of the light ray 310, and the light ray 310 in the middle position can be dispersed by the concave design of the first cambered surface 222 a. The light rays 310 at both ends of the optical lens 220 are dispersed by the convex design of the second curved surface 222b and the third curved surface 222 c. In order to further increase the diffusion surface, the area of the light exit surface 222 of the optical lens 220 is larger than the area of the light entrance surface of the optical lens 220.
In the above embodiment, in order to ensure that the coverage of the light ray 310 at both ends of the optical lens 220 in the horizontal direction is equal, the second cambered surface and the third cambered surface are symmetrically disposed on the optical axis of the optical lens. This ensures that the light 310 exits at the same angle in the two opposite directions of the optical lens 220, so that the light 310 covers the same area at both ends of the optical lens 220. Meanwhile, the symmetrical arrangement is also convenient for processing the second lens.
In one embodiment, the slope of the first cambered surface 222a gradually decreases from the optical axis position to the edge position, and the slopes of the second cambered surface 222b and the third cambered surface 222c gradually increase from the optical axis position to the edge position. It can be understood that the light exit surface 222 of the optical lens 220 is a free-form surface. The slope of the first cambered surface 222a gradually decreases from the position of the optical axis 40 to the edge position on the basis of the concave surface through the first cambered surface 222a, so as to disperse the emergent angle of the light ray 310. The second cambered surface 222b and the third cambered surface 222c gradually increase the slope on the basis of the convexity to disperse the emergent angle of the light ray 310. In addition, by the gradual change of the slope, smooth transition extension of the light-emitting surface 222 is ensured.
In one embodiment, the recess 221 includes a first wall 221a and a second wall 221b, the first wall 221a is disposed adjacent to the second arc 222b, and the second wall 221b is disposed adjacent to the third arc 222 c. The recess groove 221 formed by the extension of the first wall surface 221a and the second wall surface 221b has a tapered cross section. When the light ray 310 enters the optical lens 220, the light ray 310 is deflected on the surfaces of the first wall 221a and the second wall 221 b. The light 310 is expanded in the horizontal direction by the design of the concave groove 221 of the tapered section. It can also be understood that the light incident surface of the optical lens 220 forms a negative lens effect by the design of the concave groove 221, thereby completing the diffusion of the light 310.
Further, the first wall surface 221a and the second wall surface 221b gradually extend toward the optical axis of the optical lens in the propagation direction of the light. The first wall surface 221a and the second wall surface 221b are disposed symmetrically about the optical axis. Further ensure that light is even to form touch light curtain in touch region.
Referring to fig. 3-5, the present invention further provides an optical lens assembly, where the optical lens assembly includes a diffusing lens 210 and an optical lens 220 as described above, the light exit surface of the diffusing lens 210 is an arc surface 211, the concave groove 221 of the optical lens 220 faces the diffusing lens 210, the light passing through the arc surface 211 is converged, and the converged focal point is located between the diffusing lens 210 and the optical lens 220. The diffusion lens 210 and the optical lens 220 are disposed in order along the propagation direction of the light ray 310. The concave groove 221 functions to diffuse the light 310 converged by the diffusion lens 210. After converging the diffusion lens 210, the light ray 310 is collected in a smaller range, and the light ray 310 is directed to the concave groove 221 of the diffusion lens 210, thereby increasing the divergence angle of the light ray 310. In addition, the light 310 is concentrated in a small range, so that the light 310 has higher light intensity in the small range, the concave grooves 221 can also disperse the light intensity of the light 310, and the light can be uniformly distributed in a region with dense energy distribution and a large-angle region. The focal point through convergence is located between the diffusion lens 210 and the optical lens 220. The arcuate surface 211 serves to converge the light rays 310. The light 310 is again diffused after passing through the focal point, which is located between the diffusion lens 210 and the optical lens 220. It will be appreciated that the converging focal point is closer to the diffuser lens 210, so that the angular spread is performed soon after the short-range focusing action of the light 310 through the diffuser lens 210, so as to obtain a larger exit angle.
The outgoing angle of the light ray 310 is diffused through the diffusion lens 210, and the projection forms a touch light curtain for touch control. For example, the effective area of the touch is an area with a length of 500mm and a width of 296mm, the effective area is 20mm nearest to the light emitting surface of the optical lens 220, and the farthest position is 316mm. As can be seen, the active area is closer to the optical lens 220. To ensure that the touch screen can effectively cover the effective area, the exit angle of the light 310 can be enlarged by the diffusion lens 210. The exit angle of the light ray 310 can be made to approach 180 degrees by the diffusion lens 210 and the optical lens 220. For example, the exit angle is 160 degrees, and under the condition of 160 degrees, the light ray 310 can effectively cover the effective area of the touch.
Further, the light rays 310 passing through the curved surface 211 are converged, and the converged focal point is located between the diffusion lens 210 and the optical lens 220. The arcuate surface 211 serves to converge the light rays 310. The light 310 is again diffused after passing through the focal point, which is located between the diffusion lens 210 and the optical lens 220. It can be seen that the converging focal point is closer to the diffusion lens 210, so that after the short-distance focusing action of the diffusion lens 210, the light 310 is angle-diffused, resulting in a larger exit angle.
Referring to fig. 3 and 4, the diffusion lens 210 and the optical lens 220 are in a cylindrical structure, and an axis 201 of the diffusion lens 210 is parallel to an axis 202 of the optical lens 220. The axis 201 of the diffusion lens 210 is parallel to the axis 202 of the optical lens 220, so that the diffusion directions of the diffusion lens 210 and the optical lens 220 to the light ray 310 are the same, and the emergent angle of the light ray 310 can be further enlarged through twice diffusion. The diffusion lens and the optical lens are of a cylinder structure, and the optical axis of the diffusion lens coincides with the optical axis of the optical lens.
Further, in order to avoid the thickness of the light curtain from becoming thick, it is necessary to avoid causing the light ray 310 to diverge over the thickness of the light curtain. Therefore, the diffusion lens 210 has a cylindrical structure, the side surface of the diffusion lens 210 having the cylindrical structure faces the optical lens 220, and the optical axis 40 of the optical lens 220 is orthogonal to the axis 201 of the diffusion lens. This changes the exit angle of the light 310 in the vertical direction, and the light curtain keeps a certain thickness propagating. The diffusion lens 210 changes the exit angle of the light ray 310 in the horizontal direction. Referring to fig. 6 and 7, in order to facilitate assembly of the optical lens assembly, the diffusion lens 210 and the optical lens 220 are integrally formed. For example, the diffusion lens 210 and the optical lens 220 are made of optical plastic, and the diffusion lens assembly 20 is obtained by one injection molding process by using a thermoplastic molding method. Therefore, when the optical lens group is assembled, the assembly can be completed only by one-time positioning and installation. For example, the material of the diffusion lens 210 and the optical lens 220 is Polycarbonate (PC), but the material of the diffusion lens 210 and the optical lens 220 is not limited thereto.
In the above embodiment, the optical lens assembly includes the first collimating lens 110 and the second collimating lens 120, the first collimating lens 110 and the second collimating lens 120 are disposed on one side of the light incident direction of the diffusion lens 210, the light emitting surface of the first collimating lens 110 and the light emitting surface of the second collimating lens 120 are convex, and the convex direction faces the propagation direction of the light 310. The first collimating lens 110 and the second collimating lens 120 may also be made of optical plastic, and may be obtained by thermoplastic processing. In addition, in order to ensure the collimation effect, the light exit surface of the first collimating lens 110 and the light entrance surface of the first collimating lens 110 are spherical, wherein the light entrance surface of the first collimating lens 110 is convex toward the propagation direction of the light ray 310, that is, the light entrance surface of the first collimating lens 110 is concave. Similarly, the light emitting surface of the second collimating lens 120 and the light entering surface of the second collimating lens 120 are also spherical, and the light entering surface of the second collimating lens 120 is convex toward the propagation direction of the light ray 310, that is, the light entering surface of the second collimating lens 120 is concave. For example, the materials of the first collimating lens 110 and the second collimating lens 120 are H-F1, although the materials of the first collimating lens 110 and the second collimating lens 120 are not limited thereto. It should be noted that the light source that emits light 310 is typically a point light source. In order to smoothly realize the touch control on the touch control light curtain, the light curtain needs a certain thickness, and the point light source is difficult to form the light curtain with a certain thickness. For this reason, by the arrangement of the first collimating lens 110 and the second collimating lens 120, the propagation direction of the light ray 310 is changed when the light ray 310 passes through the first collimating lens 110 and the second collimating lens 120, the light rays 310 are parallel to each other, and a light curtain with parallel upper and lower surfaces is formed, and the distance between the upper and lower surfaces is the thickness of the light curtain. In addition, when the diffusion lens and the optical lens are in a cylinder structure, the thickness of the touch light curtain is smaller than or equal to the height of the cylinder structure.
The invention also provides a projection optical system, which comprises an infrared laser source 30 and an optical lens group, wherein the infrared laser source emits infrared laser, and the infrared laser irradiates the optical lens group. The infrared light emitted by the infrared laser source 30 covers the effective area of the touch control, and the pattern is arranged in the effective area, so that the infrared light is invisible to naked eyes, and the light 310 is prevented from affecting the display effect of the pattern. In addition, the projection optical system may further be provided with an infrared camera, and the position clicked by the finger is determined by photographing to determine the position where the light ray 310 is blocked.
The specific embodiments of the projection optical system of the present invention may refer to the embodiments of the optical lens set, and are not described herein.
The foregoing description of the preferred embodiments of the present invention should not be construed as limiting the scope of the invention, but rather should be understood to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the following description and drawings or any application directly or indirectly to other relevant art(s).
Claims (9)
1. An optical lens assembly, wherein the optical lens assembly comprises a diffusing lens and an optical lens, the optical lens comprising: a light incident surface and a light emergent surface;
the light incident surface and the light emergent surface are respectively arranged on two opposite sides of the optical lens, a concave groove is arranged in the middle of the light incident surface, and light rays are emitted into the optical lens through the concave groove;
the light-emitting surface comprises a first cambered surface, the first cambered surface is positioned at the middle position of the optical lens, and the first cambered surface is a concave surface;
the light emergent surface of the diffusion lens is an arc surface, the concave groove of the optical lens faces the diffusion lens, light rays passing through the arc surface of the diffusion lens are converged, a converged focus is positioned between the diffusion lens and the optical lens, and the converged focus is arranged close to the diffusion lens;
the diffusion lens and the optical lens are of a cylinder structure, and the optical axis of the diffusion lens coincides with the optical axis of the optical lens;
the diffusion lens is of a cylindrical structure, the side face of the diffusion lens of the cylindrical structure faces the optical lens, and the optical axis of the optical lens is orthogonal to the axis of the diffusion lens.
2. The optical lens assembly of claim 1, wherein the light-emitting surface further comprises a second cambered surface and a third cambered surface, the second cambered surface and the third cambered surface are respectively positioned at two sides of the first cambered surface and are connected with the first cambered surface, and the second cambered surface and the third cambered surface are raised surfaces.
3. The optical lens assembly of claim 1, wherein the second cambered surface and the third cambered surface are symmetrically arranged on the optical axis of the optical lens.
4. The optical lens assembly of claim 1, wherein the slope of the first curved surface decreases gradually from the optical axis position to the edge position, and the slopes of the second curved surface and the third curved surface increase gradually from the optical axis position to the edge position.
5. The optical lens assembly of any one of claims 1-4, wherein the concave groove comprises a first wall surface and a second wall surface, the first wall surface being disposed proximate to the second arcuate surface, the second wall surface being disposed proximate to the third arcuate surface.
6. The optical lens assembly of claim 5 wherein the first wall and the second wall extend gradually toward the optical axis of the optical lens in the direction of propagation of light.
7. The optical lens assembly of claim 1 wherein the diffusing lens is integrally formed with the optical lens.
8. The optical lens assembly of claim 7, wherein the optical lens assembly comprises a first collimating lens and a second collimating lens, the first collimating lens and the second collimating lens are arranged on one side of the light entering direction of the diffusion lens, and the light emitting surface of the first collimating lens and the light emitting surface of the second collimating lens are protruded towards the light propagation direction.
9. A projection optical system comprising an infrared laser source and the optical lens set according to any one of claims 1 to 8, the infrared laser source emitting infrared laser light that is directed to the optical lens set.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110606628.6A CN113419299B (en) | 2021-05-31 | 2021-05-31 | Optical lens, optical lens group and projection optical system |
| PCT/CN2021/133835 WO2022252520A1 (en) | 2021-05-31 | 2021-11-29 | Optical lens, optical lens group and projection optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110606628.6A CN113419299B (en) | 2021-05-31 | 2021-05-31 | Optical lens, optical lens group and projection optical system |
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| Publication Number | Publication Date |
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| CN113419299A CN113419299A (en) | 2021-09-21 |
| CN113419299B true CN113419299B (en) | 2023-09-22 |
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| CN202110606628.6A Active CN113419299B (en) | 2021-05-31 | 2021-05-31 | Optical lens, optical lens group and projection optical system |
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| CN (1) | CN113419299B (en) |
| WO (1) | WO2022252520A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113419299B (en) * | 2021-05-31 | 2023-09-22 | 歌尔光学科技有限公司 | Optical lens, optical lens group and projection optical system |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN113419299A (en) | 2021-09-21 |
| WO2022252520A1 (en) | 2022-12-08 |
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