CN212060718U - Large-light-transmission high-resolution optical imaging lens - Google Patents
Large-light-transmission high-resolution optical imaging lens Download PDFInfo
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Abstract
The utility model relates to a camera lens technical field. The utility model discloses an optical imaging lens with large light transmission and high resolution, which comprises a first lens to a seventh lens from an object side to an image side along an optical axis in sequence; the first lens element has positive refractive index and a convex object-side surface; the second lens, the fifth lens and the sixth lens are all convex lenses with positive refractive index; the third lens and the fourth lens are both concave lenses with negative refraction; the seventh lens element has a negative refractive index and a concave object-side surface; the second lens and the third lens are mutually glued. The utility model has the advantages of short total length, high resolution, large light transmission, high imaging quality and no coke loss at high and low temperature.
Description
Technical Field
The utility model belongs to the technical field of the camera lens, specifically relate to an optical imaging camera lens of big light through high resolution.
Background
With the continuous progress of scientific technology and the continuous development of society, in recent years, optical imaging lenses are also rapidly developed, and the optical imaging lenses are widely applied to various fields such as smart phones, tablet computers, video conferences, vehicle-mounted monitoring, security monitoring, machine vision and the like, so that the requirements on the optical imaging lenses are higher and higher.
In a machine vision system, the performance of an optical imaging lens is critical, and the feasibility and reliability of the whole system are affected. However, the optical imaging lens applied to the machine vision system at present has many defects, such as no thermalization is not considered during design, and the optical imaging lens is easy to lose focus under the high-temperature and low-temperature working environments; the method has poor control on the transfer function and low resolution and cannot meet the requirement of an industrial camera with high pixels; the light passing is generally small, the light inlet quantity is low in a low-light environment, and the shot picture is dark; in order to meet the requirements of high resolution, more and more lenses, longer optical total length and the like, the increasing requirements of a machine vision system cannot be met, and the improvement is urgently needed.
Disclosure of Invention
An object of the utility model is to provide a big through-light high resolution's optical imaging lens is used for solving the technical problem that above-mentioned exists.
In order to achieve the above object, the utility model adopts the following technical scheme: an optical imaging lens with large light transmission and high resolution sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens from an object side to an image side along an optical axis; the first lens element to the seventh lens element each include an object-side surface facing the object side and passing the imaging light and an image-side surface facing the image side and passing the imaging light;
the first lens element has positive refractive index, and the object-side surface of the first lens element is convex;
the second lens element with positive refractive index has a convex object-side surface and a convex image-side surface;
the third lens element with negative refractive index has a concave object-side surface and a concave image-side surface;
the fourth lens element with negative refractive index has a concave object-side surface and a concave image-side surface;
the fifth lens element with positive refractive index has a convex object-side surface and a convex image-side surface;
the sixth lens element with positive refractive index has a convex object-side surface and a convex image-side surface;
the seventh lens element has a negative refractive index, and the object-side surface of the seventh lens element is concave;
the second lens and the third lens are mutually glued;
the optical imaging lens has only the first lens to the seventh lens.
Further, the fourth lens and the fifth lens are cemented with each other.
Furthermore, the lens further comprises a diaphragm, and the diaphragm is arranged between the third lens and the fourth lens.
Further, the optical imaging lens further satisfies: and the BFL/TTL is more than 0.2, wherein the BFL is the optical back focus of the optical imaging lens, and the TTL is the distance between the object side surface of the first lens and the imaging surface on the optical axis.
Further, the optical imaging lens further satisfies: TTL/IMH is less than 3.5, wherein TTL is the distance between the object side surface of the first lens and the imaging surface on the optical axis, and IMH is the image surface height of the optical imaging lens.
Further, the optical imaging lens further satisfies: 0.8< | f4/f5 | <1.2, wherein f4 is the focal length of the fourth lens element, and f5 is the focal length of the fifth lens element.
Further, the optical imaging lens further satisfies: 0.8< | f6/f7 | <1.2, wherein f6 is the focal length of the sixth lens element, and f7 is the focal length of the seventh lens element.
Further, the optical imaging lens further satisfies: vd2-vd3 > 25, where vd2 is the Abbe number of the second lens and vd3 is the Abbe number of the third lens.
Further, the temperature coefficient of refractive index dn2/dt of the second lens is negative, wherein n2 is the refractive index of the second lens, and t is the temperature.
Further, the temperature coefficient of refractive index dn3/dt of the third lens is positive, and dn3/dt > 8 × 10E-6/DEG C is satisfied, wherein n3 is the refractive index of the third lens, and t is temperature.
The utility model has the advantages of:
the utility model adopts seven lenses, and has high resolution ratio by correspondingly designing each lens; the image surface is larger; the distortion is small; focusing at normal temperature, and not losing focus at high and low temperature; the light transmission is large, more light input quantity can be obtained, the picture is bright, and the low-light effect is good; short optical total length, simple structure and easy batch production.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention;
FIG. 2 is a graph of the MTF of the visible light 435 and 650nm according to the first embodiment of the present invention;
fig. 3 is a schematic view of curvature of field and distortion according to the first embodiment of the present invention;
fig. 4 is a schematic view of a chromatic aberration curve according to a first embodiment of the present invention;
fig. 5 is a schematic structural diagram of a second embodiment of the present invention;
FIG. 6 is a graph of the MTF of visible light 435-;
fig. 7 is a schematic view of curvature of field and distortion according to the second embodiment of the present invention;
fig. 8 is a schematic view of a color difference curve according to a second embodiment of the present invention;
fig. 9 is a schematic structural diagram of a third embodiment of the present invention;
FIG. 10 is the MTF graph of visible light 435-;
fig. 11 is a schematic view of curvature of field and distortion in a third embodiment of the present invention;
fig. 12 is a schematic view of a color difference curve according to a third embodiment of the present invention;
fig. 13 is a schematic structural diagram of a fourth embodiment of the present invention;
FIG. 14 is the MTF graph of visible light 435-;
fig. 15 is a graphical illustration of curvature of field and distortion for a fourth embodiment of the present invention;
fig. 16 is a schematic diagram of a color difference curve according to a fourth embodiment of the present invention.
Detailed Description
To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.
The present invention will now be further described with reference to the accompanying drawings and detailed description.
The term "a lens element having positive refractive index (or negative refractive index)" means that the paraxial refractive index of the lens element calculated by Gaussian optics theory is positive (or negative). The term "object-side (or image-side) of a lens" is defined as the specific range of imaging light rays passing through the lens surface. The determination of the surface shape of the lens can be performed by the judgment method of a person skilled in the art, i.e., by the sign of the curvature radius (abbreviated as R value). The R value may be commonly used in optical design software, such as Zemax or CodeV. The R value is also commonly found in lens data sheets (lens data sheets) of optical design software. When the R value is positive, the object side is judged to be a convex surface; and when the R value is negative, judging that the object side surface is a concave surface. On the contrary, regarding the image side surface, when the R value is positive, the image side surface is judged to be a concave surface; when the R value is negative, the image side surface is judged to be convex.
The utility model discloses an optical imaging lens with large light transmission and high resolution, which comprises a first lens to a seventh lens from an object side to an image side along an optical axis in sequence; the first lens element to the seventh lens element each include an object-side surface facing the object side and passing the image light, and an image-side surface facing the image side and passing the image light.
The first lens element has positive refractive index, and the object-side surface of the first lens element is convex.
The second lens element with positive refractive index has a convex object-side surface and a convex image-side surface.
The third lens element with negative refractive index has a concave object-side surface and a concave image-side surface.
The fourth lens element with negative refractive index has a concave object-side surface and a concave image-side surface.
The fifth lens element with positive refractive power has a convex object-side surface and a convex image-side surface.
The sixth lens element with positive refractive power has a convex object-side surface and a convex image-side surface.
The seventh lens element has a negative refractive index, and the object-side surface of the seventh lens element is concave.
The second lens and the third lens are mutually glued; the optical imaging lens has only the first lens to the seventh lens.
The utility model adopts seven lenses, and has high resolution ratio by correspondingly designing each lens; the image surface is larger; the distortion is small; focusing at normal temperature, and not losing focus at high and low temperature; the light transmission is large, more light input quantity can be obtained, the picture is bright, and the low-light effect is good; short optical total length, simple structure and easy batch production.
Preferably, the fourth lens and the fifth lens are mutually glued, so that the optical total length of the optical imaging lens is further shortened, and chromatic aberration is optimized.
More preferably, the optical system further comprises a diaphragm, the diaphragm is arranged between the third lens and the fourth lens, and a cemented lens is respectively arranged in front of and behind the diaphragm, so that the symmetrical form is favorable for optimizing distortion.
Preferably, the optical imaging lens further satisfies: BFL/TTL is more than 0.2, wherein BFL is optical back focus of the optical imaging lens, TTL is distance between object side surface of the first lens and the imaging surface on the optical axis, optical total length of the optical imaging lens is further shortened, and system miniaturization is realized.
Preferably, the optical imaging lens further satisfies: TTL/IMH is less than 3.5, wherein TTL is the distance between the object side surface of the first lens and the imaging surface on the optical axis, IMH is the image surface height of the optical imaging lens, the optical total length of the optical imaging lens is further shortened, and a large image surface is realized.
Preferably, the optical imaging lens further satisfies: 0.8< | f4/f5 | <1.2, wherein f4 is the focal length of the fourth lens element, and f5 is the focal length of the fifth lens element, thereby further optimizing the temperature drift.
Preferably, the optical imaging lens further satisfies: 0.8< | f6/f7 | <1.2, wherein f6 is the focal length of the sixth lens element, and f7 is the focal length of the seventh lens element, thereby further optimizing the temperature drift.
Preferably, the optical imaging lens further satisfies: vd2-vd3 > 25, wherein vd2 is the abbe number of the second lens, and vd3 is the abbe number of the third lens, further optimizing chromatic aberration.
Preferably, the temperature coefficient of refractive index dn2/dt of the second lens is negative, where n2 is the refractive index of the second lens, t is the temperature, the refractive index of the second lens decreases with increasing temperature, the power of the lens is positive, and the equilibrium temperature drift.
Preferably, the temperature coefficient of refractive index dn3/dt of the third lens is positive, and dn3/dt > 8 × 10E-6/deg.c is satisfied, where n3 is the refractive index of the third lens, t is temperature, the optical power of the third lens is negative, the refractive index increases with increasing temperature, and the increase is faster, so as to better balance temperature drift.
The optical imaging lens with large light transmission and high resolution of the present invention will be described in detail with specific embodiments.
Example one
As shown in fig. 1, the optical imaging lens with large light transmission and high resolution includes, in order along an optical axis I, a first lens 1, a second lens 2, a third lens 3, a stop 8, a fourth lens 4, a fifth lens 5, a sixth lens 6, a seventh lens 7, a protective sheet 9, and an image plane 100 from an object side a1 to an image side a 2; the first lens element 1 to the seventh lens element 7 each include an object-side surface facing the object side a1 and passing the image light, and an image-side surface facing the image side a2 and passing the image light.
The first lens element 1 has positive refractive power, the object-side surface 11 of the first lens element 1 is convex, and the image-side surface 12 of the first lens element 1 is concave, although in other embodiments, the image-side surface 12 of the first lens element 1 can be flat or convex.
The second lens element 2 has a positive refractive index, and an object-side surface 21 of the second lens element 2 is convex and an image-side surface 22 of the second lens element 2 is convex.
The third lens element 3 has a negative refractive index, and an object-side surface 31 of the third lens element 3 is concave and an image-side surface 32 of the third lens element 3 is concave.
The fourth lens element 4 has a negative refractive index, and an object-side surface 41 of the fourth lens element 4 is concave and an image-side surface 42 of the fourth lens element 4 is concave.
The fifth lens element 5 has a positive refractive index, and an object-side surface 51 of the fifth lens element 5 is convex and an image-side surface 52 of the fifth lens element 5 is convex.
The sixth lens element 6 has a positive refractive index, and an object-side surface 61 of the sixth lens element 6 is convex and an image-side surface 62 of the sixth lens element 6 is convex.
The seventh lens element 7 has negative refractive power, the object-side surface 71 of the seventh lens element 7 is concave, and the image-side surface 72 of the seventh lens element 7 is planar, although the image-side surface 72 of the seventh lens element 7 can be concave or convex in other embodiments.
The second lens 2 and the third lens 3 are cemented with each other, and the fourth lens 4 and the fifth lens 5 are cemented with each other.
In this embodiment, the temperature coefficient of refractive index dn2/dt of the second lens element 2 is negative; the temperature coefficient of refractive index dn3/dt of the third lens 3 is positive and satisfies dn3/dt > 8 × 10E-6/deg.c, and the third lens 3 can be made of H-ZLAF53B material, but is not limited thereto.
In this embodiment, the first lens 1 to the seventh lens 7 are made of a glass material, but the present invention is not limited thereto, and in other embodiments, a material such as plastic may be used.
In other embodiments, the diaphragm 8 may be disposed at other suitable positions.
The detailed optical data of this embodiment are shown in Table 1-1.
Table 1-1 detailed optical data for example one
Please refer to table 5 for the values of the conditional expressions related to this embodiment.
The MTF transfer function curve chart of the specific embodiment is shown in detail in FIG. 2, and it can be seen that the resolution is high, and when the MTF transfer function curve chart is used, the spatial frequency can reach 300lp/mm, and the image quality requirement of more than 20M can be met; as for the field curvature and distortion diagram, please refer to (a) and (B) of fig. 3, it can be seen that the field curvature and distortion are small, and the imaging quality is good; the color difference curve chart is shown in detail in fig. 4, and it can be seen that the color difference is small and the color reducibility is good.
The temperature compensation is considered in design, when the device is used in a temperature range of-40 ℃ to 70 ℃, the device is matched with a camera, the back focal offset is small, the device can be focused at normal temperature, the device can not be defocused at high and low temperatures, and the clear picture can be ensured.
In this embodiment, the focal length f of the optical imaging lens is 25.5 mm; the field angle FOV is 24 °; f-number FNO 1.8; the height IMH of the image plane is 11.5mm, and the sensor can support 2/3'; the distance TTL between the object-side surface 11 of the first lens element 1 and the image plane 100 on the optical axis I is 37.6 mm.
Example two
As shown in fig. 5, the lens elements of this embodiment have the same surface roughness and refractive index as those of the first embodiment, and only the optical parameters such as the curvature radius of the surface of each lens element and the lens thickness are different.
The detailed optical data of this embodiment is shown in Table 2-1.
TABLE 2-1 detailed optical data for example two
Please refer to table 5 for the values of the conditional expressions related to this embodiment.
The MTF transfer function curve chart of the specific embodiment is shown in detail in FIG. 6, and it can be seen that the resolution is high, and when the MTF transfer function curve chart is used, the spatial frequency can reach 300lp/mm, and the image quality requirement of more than 20M can be met; as for the field curvature and distortion diagram, please refer to (a) and (B) of fig. 7, it can be seen that the field curvature and distortion are small, and the imaging quality is good; the color difference curve chart is shown in detail in fig. 8, and it can be seen that the color difference is small and the color reducibility is good.
The temperature compensation is considered in design, when the device is used in a temperature range of-40 ℃ to 70 ℃, the device is matched with a camera, the back focal offset is small, the device can be focused at normal temperature, the device can not be defocused at high and low temperatures, and the clear picture can be ensured.
In this embodiment, the focal length f of the optical imaging lens is 25.8 mm; the field angle FOV is 24 °; f-number FNO 1.8; the height IMH of the image plane is 11.6mm, and the sensor can support 2/3'; the distance TTL between the object-side surface 11 of the first lens element 1 and the image plane 100 on the optical axis I is 38.0 mm.
EXAMPLE III
As shown in fig. 9, the surface-type convexo-concave shapes and the refractive indexes of the lenses of the present embodiment and the first embodiment are substantially the same, only the image-side surface 72 of the seventh lens element 7 is a concave surface, and the optical parameters such as the curvature radius of the lens surface and the lens thickness are different.
The detailed optical data of this embodiment is shown in Table 3-1.
TABLE 3-1 detailed optical data for EXAMPLE III
Please refer to table 5 for the values of the conditional expressions related to this embodiment.
The MTF transfer function curve chart of the specific embodiment is shown in detail in FIG. 10, and it can be seen that the resolution is high, and when the MTF transfer function curve chart is used, the spatial frequency can reach 300lp/mm, and the image quality requirement of more than 20M can be met; referring to fig. 11 (a) and (B), it can be seen that the field curvature and distortion are small, and the imaging quality is good; the color difference graph is shown in detail in fig. 12, and it can be seen that the color difference is small and the color reducibility is good.
The temperature compensation is considered in design, when the device is used in a temperature range of-40 ℃ to 70 ℃, the device is matched with a camera, the back focal offset is small, the device can be focused at normal temperature, the device can not be defocused at high and low temperatures, and the clear picture can be ensured.
In this embodiment, the focal length f of the optical imaging lens is 25.6 mm; the field angle FOV is 24 °; f-number FNO 1.8; the height IMH of the image plane is 11.5mm, and the sensor can support 2/3'; the distance TTL between the object-side surface 11 of the first lens element 1 and the image plane 100 on the optical axis I is 39.9 mm.
Example four
As shown in fig. 13, the surface convexoconcave and the refractive index of each lens element of the present embodiment are substantially the same as those of the first embodiment, only the image-side surface 12 of the first lens element 1 is a flat surface, and the optical parameters such as the curvature radius of the surface of each lens element and the thickness of the lens element are different.
The detailed optical data of this embodiment is shown in Table 4-1.
TABLE 4-1 detailed optical data for example four
Please refer to table 5 for the values of the conditional expressions related to this embodiment.
The MTF transfer function graph of the present embodiment is detailed in fig. 14, and it can be seen that the resolution is high, and when the MTF transfer function graph is used, the spatial frequency is up to 300lp/mm, and the image quality requirement above 20M is met; as for the field curvature and distortion images, see (a) and (B) of fig. 15, it can be seen that the field curvature and distortion are small, and the imaging quality is good; the color difference curve chart is shown in detail in fig. 16, and it can be seen that the color difference is small and the color reducibility is good.
The temperature compensation is considered in design, when the device is used in a temperature range of-40 ℃ to 70 ℃, the device is matched with a camera, the back focal offset is small, the device can be focused at normal temperature, the device can not be defocused at high and low temperatures, and the clear picture can be ensured.
In this embodiment, the focal length f of the optical imaging lens is 25.6 mm; the field angle FOV is 24 °; f-number FNO 1.8; the height IMH of the image plane is 11.8mm, and the sensor can support 2/3'; the distance TTL between the object-side surface 11 of the first lens element 1 and the image plane 100 on the optical axis I is 38.7 mm.
Table 5 values of relevant important parameters of four embodiments of the present invention
| First embodiment | Second embodiment | Third embodiment | Fourth embodiment | |
| IMH | 11.5 | 11.6 | 11.5 | 11.8 |
| TTL | 37.6 | 38.0 | 39.9 | 38.7 |
| BFL | 10.27 | 10.23 | 10.13 | 10.4 |
| BFL/TTL | 0.27 | 0.27 | 0.25 | 0.26 |
| TTL/IMH | 3.27 | 3.28 | 3.47 | 3.28 |
| f4 | -9.4 | -9.2 | -10.4 | -9.4 |
| f5 | 8.5 | 8.5 | 9.4 | 8.7 |
| f6 | 21.4 | 21.0 | 14.7 | 21.6 |
| f7 | -21.9 | -21.8 | -15.5 | -21.3 |
| ∣f4/f5∣ | 1.11 | 1.08 | 1.11 | 1.08 |
| ∣f6/f7∣ | 0.98 | 0.96 | 0.95 | 1.01 |
| vd2-vd3 | 31.39 | 28.23 | 31.39 | 28.23 |
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. An optical imaging lens with large light transmission and high resolution is characterized in that: the lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens in sequence from the object side to the image side along an optical axis; the first lens element to the seventh lens element each include an object-side surface facing the object side and passing the imaging light and an image-side surface facing the image side and passing the imaging light;
the first lens element has positive refractive index, and the object-side surface of the first lens element is convex;
the second lens element with positive refractive index has a convex object-side surface and a convex image-side surface;
the third lens element with negative refractive index has a concave object-side surface and a concave image-side surface;
the fourth lens element with negative refractive index has a concave object-side surface and a concave image-side surface;
the fifth lens element with positive refractive index has a convex object-side surface and a convex image-side surface;
the sixth lens element with positive refractive index has a convex object-side surface and a convex image-side surface;
the seventh lens element has a negative refractive index, and the object-side surface of the seventh lens element is concave;
the second lens and the third lens are mutually glued;
the optical imaging lens has only the first lens to the seventh lens.
2. The large-pass high-resolution optical imaging lens according to claim 1, characterized in that: the fourth lens and the fifth lens are mutually glued.
3. The large-pass high-resolution optical imaging lens according to claim 2, characterized in that: the diaphragm is arranged between the third lens and the fourth lens.
4. The large-pass high-resolution optical imaging lens according to claim 1, further satisfying: and the BFL/TTL is more than 0.2, wherein the BFL is the optical back focus of the optical imaging lens, and the TTL is the distance between the object side surface of the first lens and the imaging surface on the optical axis.
5. The large-pass high-resolution optical imaging lens according to claim 1, further satisfying: TTL/IMH is less than 3.5, wherein TTL is the distance between the object side surface of the first lens and the imaging surface on the optical axis, and IMH is the image surface height of the optical imaging lens.
6. The large-pass high-resolution optical imaging lens according to claim 1, further satisfying: 0.8< | f4/f5 | <1.2, wherein f4 is the focal length of the fourth lens element, and f5 is the focal length of the fifth lens element.
7. The large-pass high-resolution optical imaging lens according to claim 1, further satisfying: 0.8< | f6/f7 | <1.2, wherein f6 is the focal length of the sixth lens element, and f7 is the focal length of the seventh lens element.
8. The large-pass high-resolution optical imaging lens according to claim 1, further satisfying: vd2-vd3 > 25, where vd2 is the Abbe number of the second lens and vd3 is the Abbe number of the third lens.
9. The large-pass high-resolution optical imaging lens according to claim 1, characterized in that: the temperature coefficient of refractive index dn2/dt of the second lens is negative, wherein n2 is the refractive index of the second lens, and t is the temperature.
10. The large-pass high-resolution optical imaging lens according to claim 1, characterized in that: the temperature coefficient of refractive index dn3/dt of the third lens is positive and satisfies dn3/dt > 8 x 10E-6/DEG C, wherein n3 is the refractive index of the third lens, and t is temperature.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112630940A (en) * | 2020-12-30 | 2021-04-09 | 厦门力鼎光电股份有限公司 | Optical imaging lens with large image surface |
| CN112748544A (en) * | 2021-01-29 | 2021-05-04 | 浙江舜宇光学有限公司 | Optical imaging system |
| CN113568141A (en) * | 2021-07-16 | 2021-10-29 | Oppo广东移动通信有限公司 | Lens, projection optical machine and near-to-eye display equipment |
| CN116107055A (en) * | 2022-09-23 | 2023-05-12 | 浙江大华技术股份有限公司 | High-performance optical lens and high-precision laser radar |
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2020
- 2020-06-03 CN CN202020996557.6U patent/CN212060718U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112630940A (en) * | 2020-12-30 | 2021-04-09 | 厦门力鼎光电股份有限公司 | Optical imaging lens with large image surface |
| CN112748544A (en) * | 2021-01-29 | 2021-05-04 | 浙江舜宇光学有限公司 | Optical imaging system |
| CN112748544B (en) * | 2021-01-29 | 2022-05-03 | 浙江舜宇光学有限公司 | Optical imaging system |
| CN113568141A (en) * | 2021-07-16 | 2021-10-29 | Oppo广东移动通信有限公司 | Lens, projection optical machine and near-to-eye display equipment |
| CN116107055A (en) * | 2022-09-23 | 2023-05-12 | 浙江大华技术股份有限公司 | High-performance optical lens and high-precision laser radar |
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