CN109061841B - 4K fish-eye lens - Google Patents
4K fish-eye lens Download PDFInfo
- Publication number
- CN109061841B CN109061841B CN201811226481.2A CN201811226481A CN109061841B CN 109061841 B CN109061841 B CN 109061841B CN 201811226481 A CN201811226481 A CN 201811226481A CN 109061841 B CN109061841 B CN 109061841B
- Authority
- CN
- China
- Prior art keywords
- lens
- equal
- less
- refractive index
- abbe number
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000003287 optical effect Effects 0.000 claims abstract description 24
- 239000011521 glass Substances 0.000 claims abstract description 18
- 230000005499 meniscus Effects 0.000 claims abstract description 5
- 238000003384 imaging method Methods 0.000 description 4
- 230000004075 alteration Effects 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The invention discloses a 4K fish-eye lens. The fisheye lens includes: the optical lenses sequentially arranged from the object space to the image space in the lens barrel are as follows: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, a diaphragm, an eighth lens, a ninth lens, a tenth lens, an eleventh lens, and a filter; the first, second, eighth and tenth lenses are meniscus glass lenses having negative optical power, the third and sixth lenses are biconcave glass lenses having negative optical power, and the fourth, fifth, seventh, ninth and eleventh lenses are biconvex glass lenses having positive optical power; the convex surfaces of the first lens, the second lens, the eighth lens and the tenth lens face to the object side, and the concave surfaces face to the image side. The fisheye lens can improve definition and is suitable for processing and production.
Description
Technical Field
The invention relates to the field of security monitoring, in particular to a 4K extremely clear fisheye lens.
Background
In recent years, with the rising of 4K and 8K resolutions in the security field, the requirements of the market on security monitoring lenses are higher and higher, the pixels are higher, the image quality is better, the size requirements are short, the aperture is larger, and the like. The fisheye lens with the angle of view larger than 180 degrees is widely applied to various panoramic monitoring occasions, such as parking lots, because of the large observation angle range and no dead angle. The pixels of the common fisheye lens are mostly between 200 ten thousand and 500 ten thousand pixels, and the 4K requirement cannot be met. Some fish-eye lenses which can meet the requirement of 4K extremely clear are sensitive in the aspect of coaxiality due to more component numbers, and are not beneficial to mass production; or an aspherical lens is adopted, so that the processing difficulty of the lens is high.
Disclosure of Invention
The invention aims to provide a 4K fish-eye lens which can improve definition and is suitable for processing and production.
In order to achieve the above object, the present invention provides the following solutions:
a 4K fisheye lens, the fisheye lens comprising: the optical lenses sequentially arranged from the object space to the image space in the lens barrel are as follows: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, a diaphragm, an eighth lens, a ninth lens, a tenth lens, an eleventh lens, and a filter; the first, second, eighth and tenth lenses are meniscus glass lenses having negative optical power, the third and sixth lenses are biconcave glass lenses having negative optical power, and the fourth, fifth, seventh, ninth and eleventh lenses are biconvex glass lenses having positive optical power; the convex surfaces of the first lens, the second lens, the eighth lens and the tenth lens face to the object side, and the concave surfaces face to the image side.
Optionally, the third lens and the fourth lens are glued together; the sixth lens and the seventh lens are glued together; the eighth lens and the ninth lens are glued together; the tenth lens and the eleventh lens are glued together.
Optionally, the filter adopts an infrared cut filter or blue glass.
Optionally, the refractive index nd1 of the first lens is more than or equal to 1.90, and the Abbe number Vd1 is less than or equal to 40; the refractive index nd2 of the second lens is more than or equal to 1.80, and the Abbe number Vd2 is less than or equal to 45; the refractive index nd8 of the eighth lens is less than or equal to 1.65, and the Abbe number Vd8 is more than or equal to 55; the refractive index nd10 of the tenth lens is more than or equal to 1.75, and the Abbe number Vd10 is less than or equal to 40.
Optionally, the refractive index nd3 of the third lens is more than or equal to 1.80, and the Abbe number Vd3 is less than or equal to 45; the refractive index nd6 of the sixth lens is more than or equal to 1.85, and the Abbe number Vd6 is less than or equal to 45.
Optionally, the concave surfaces of the third lens and the sixth lens face the object side and the image side.
Optionally, the refractive index nd4 of the fourth lens is more than or equal to 1.70, and the Abbe number Vd4 is less than or equal to 30; the refractive index nd5 of the fifth lens is more than or equal to 1.80, and the Abbe number Vd5 is less than or equal to 45; the refractive index nd7 of the seventh lens is less than or equal to 1.65, and the Abbe number Vd7 is less than or equal to 50; the refractive index nd9 of the ninth lens is less than or equal to 1.55, and the Abbe number Vd9 is more than or equal to 65; the refractive index nd11 of the eleventh lens is less than or equal to 1.55, and the Abbe number Vd11 is more than or equal to 65.
Optionally, the convex surfaces of the fourth lens, the fifth lens, the seventh lens, the ninth lens and the eleventh lens face the object side and the image side.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects: the invention provides a 4K fisheye lens, which comprises: the optical lenses sequentially arranged from the object space to the image space in the lens barrel are as follows: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, a diaphragm, an eighth lens, a ninth lens, a tenth lens, an eleventh lens, and a filter; the first, second, eighth and tenth lenses are meniscus glass lenses having negative optical power, the third and sixth lenses are biconcave glass lenses having negative optical power, and the fourth, fifth, seventh, ninth and eleventh lenses are biconvex glass lenses having positive optical power; the convex surfaces of the first lens, the second lens, the eighth lens and the tenth lens face to the object side, and the concave surfaces face to the image side. The angle of view of the fisheye lens can reach 185 degrees, the imaging circle can reach phi 5.335mm, the aperture value can reach 2.0, the visible light resolution can reach 1200 ten thousand pixels, the requirement of 4K extremely clear is completely met, and the fisheye lens has wide market prospect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a 4K fisheye lens device of the invention;
FIG. 2 is a dot column diagram of the present invention at 436-656nm visible light.
FIG. 3 is a graph of MTF at 436-656nm for visible light in accordance with the present invention.
FIG. 4 is a graph of field curvature and distortion at 436-656nm for visible light in accordance with the present invention.
FIG. 5 is a graph of relative illuminance at 436-656nm for visible light according to the invention.
FIG. 6 is a graph of the defocus MTF at 436-656nm for visible light of the present invention.
FIG. 7 is a graph of the color difference of magnification at 436-656nm for visible light according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. 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.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
Fig. 1 is a schematic view of a 4K fisheye lens device of the invention. As shown in fig. 1, a 4K fisheye lens, the fisheye lens comprises: the optical lenses sequentially arranged from the object space to the image space in the lens barrel are as follows: a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, a sixth lens 6, a seventh lens 7, a stop 8, an eighth lens 9, a ninth lens 10, a tenth lens 11, an eleventh lens 12, and a filter 13; the first, second, eighth and tenth lenses 1, 2, 9, 11 are meniscus glass lenses having negative optical power, the third and sixth lenses 3, 6 are biconcave glass lenses having negative optical power, and the fourth, fifth, seventh, ninth, and eleventh lenses 4, 5, 7, 10, 12 are biconcave glass lenses having positive optical power; the convex surfaces of the first lens 1, the second lens 2, the eighth lens 9 and the tenth lens 11 face the object side, and the concave surfaces face the image side.
The third lens 3 and the fourth lens 4 are glued together to form a glued lens with negative focal power, and the glued surface is plated with an antireflection film. The sixth lens 6 and the seventh lens 7 are glued together to form a glued lens with negative focal power. The eighth lens 9 and the ninth lens 10 are glued together to form a glued lens with positive focal power. The tenth lens and the eleventh lens are glued together to form a glued lens with positive focal power. The refractive index nd10 of the tenth lens 11 and the refractive index nd11 of the eleventh lens 12 are in a range of nd10-nd11 being more than or equal to 0.25, and the Abbe number Vd10 of the tenth lens 11 and the Abbe number Vd11 of the eleventh lens 12 are in a range of Vd11-Vd10 being more than or equal to 30.
The filter adopts an infrared cut-off filter or blue glass, the spectral reflectivity of a visible light wave band is low, and other wave bands are cut off.
The refractive index nd1 of the first lens is more than or equal to 1.90, and the Abbe number Vd1 is less than or equal to 40; the refractive index nd2 of the second lens is more than or equal to 1.80, and the Abbe number Vd2 is less than or equal to 45; the refractive index nd8 of the eighth lens is less than or equal to 1.65, and the Abbe number Vd8 is more than or equal to 55; the refractive index nd10 of the tenth lens is more than or equal to 1.75, and the Abbe number Vd10 is less than or equal to 40.
The refractive index nd3 of the third lens is more than or equal to 1.80, and the Abbe number Vd3 is less than or equal to 45; the refractive index nd6 of the sixth lens is more than or equal to 1.85, and the Abbe number Vd6 is less than or equal to 45. The concave surfaces of the third lens and the sixth lens face to the object side and the image side.
The refractive index nd4 of the fourth lens is more than or equal to 1.70, and the Abbe number Vd4 is less than or equal to 30; the refractive index nd5 of the fifth lens is more than or equal to 1.80, and the Abbe number Vd5 is less than or equal to 45; the refractive index nd7 of the seventh lens is less than or equal to 1.65, and the Abbe number Vd7 is less than or equal to 50; the refractive index nd9 of the ninth lens is less than or equal to 1.55, and the Abbe number Vd9 is more than or equal to 65; the refractive index nd11 of the eleventh lens is less than or equal to 1.55, and the Abbe number Vd11 is more than or equal to 65. Convex surfaces of the fourth lens, the fifth lens, the seventh lens, the ninth lens and the eleventh lens face to an object side and an image side.
Fig. 2 to 7 are graphs showing optical performance of the present invention applied to an embodiment, in which:
FIG. 2 is a plot of the points at 436nm-656nm for visible light according to the present invention, wherein the wavelengths are taken as g light (436 nm), F light (486 nm), e light (546 nm), d light (588 nm) and C light (656 nm) at a weight ratio of 3:7:10:8:3. As can be seen from fig. 2, the diffuse spots in each view field are concentrated and distributed uniformly. Meanwhile, the phenomenon that the diffuse spots are separated up and down along with the wavelength under a certain visual field does not occur, which indicates that the purple fringing is better eliminated.
FIG. 3 is a graph showing MTF at 436nm-656nm for visible light in accordance with the present invention. The MTF graph represents the comprehensive resolution level of an optical system, and as can be seen from FIG. 3, the full-field MTF value at 350lp/mm is more than or equal to 0.2, the imaging is clear, and the requirement of 4K is met. In addition, the MTF of the optical lens at each wavelength also performs very well.
FIG. 4 is a graph showing field curvature and distortion at 436nm-656nm for visible light in accordance with the present invention. The distortion graph shows the magnitude of F-Theta distortion in% for different angles of view. As can be seen from FIG. 4, the F-Theta distortion has an absolute value of 0.5% or less.
FIG. 5 is a graph showing the relative illuminance at 436nm-656nm for the visible light of the present invention. As can be seen from fig. 5, the curve is smoothly dropped, the relative illuminance value at the maximum field is > 0.7, and the imaged picture is bright.
FIG. 6 is a graph of the defocus MTF of the present invention at 436nm-656nm with a spatial frequency of 200lp/mm and a defocus range of-0.03 mm to 0.03mm. The map may reflect the extent of curvature of field correction. When a system has a field curvature, the center and the periphery cannot be synchronous and clear as a result, namely, the center of the field of view is adjusted to be the clearest, but the edges are not clear enough; the edges of the field of view need to be made clear by reducing the sharpness of the center of the field of view by recalling. As can be seen from fig. 6, the curvature of field corrects better.
FIG. 7 is a graph showing the chromatic aberration of magnification at 436nm to 656nm of visible light according to the present invention, from which the degree of chromatic aberration of magnification correction can be known in combination with the size of the pixel particles. As can be seen from FIG. 7, the chromatic aberration of magnification at 436nm wavelength is less than 2 pixels in size, and the purple fringing is eliminated.
In the embodiment of the present invention, the overall focal length of the optical lens is EFL, the aperture is FNO, the field angle is FOV, the total lens length TTL, the image plane chief ray incident angle CRA, and the object side starts to number each mirror in sequence, the mirrors of the first lens 1 are R1 and R2, the mirrors of the second lens 2 are R3 and R4, the mirrors of the third lens 3 are R5 and R6, the mirrors of the fourth lens 4 are R6 and R7, the mirrors of the fifth lens 5 are R8 and R9, the mirrors of the sixth lens 6 are R10 and R11, the mirrors of the seventh lens 7 are R11 and R12, the diaphragm 8, the mirrors of the eighth lens 9 are R13 and R14, the mirrors of the ninth lens 10 are R14 and R15, the mirrors of the tenth lens 11 are R16 and R17, the mirrors of the eleventh lens 12 are R17 and R18, and the filter 13.
Preferred parameter values of the invention (Table one):
efl=1.661mm, fno=2.0, fov=185°, imaging circle diameter=Φ5.335mm, ttl=44.15 mm, cra No. 13.47 °, photosensitive imaging chip is IMX226 of SONY, unit: mm.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to assist in understanding the methods of the present invention and the core ideas thereof; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (8)
1. A 4K fisheye lens, wherein the fisheye lens comprises: the optical lenses sequentially arranged from the object space to the image space in the lens barrel are as follows: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, a diaphragm, an eighth lens, a ninth lens, a tenth lens, an eleventh lens, and a filter; the first, second, eighth and tenth lenses are meniscus glass lenses having negative optical power, the third and sixth lenses are biconcave glass lenses having negative optical power, and the fourth, fifth, seventh, ninth and eleventh lenses are biconvex glass lenses having positive optical power; the convex surfaces of the first lens, the second lens, the eighth lens and the tenth lens face to the object space, and the concave surfaces face to the image space;
and the third lens and the fourth lens are glued together to form a glued lens with negative focal power, and the glued surface is plated with an antireflection film.
2. The 4K fisheye lens of claim 1 wherein the sixth lens and seventh lens are cemented together; the eighth lens and the ninth lens are glued together; the tenth lens and the eleventh lens are glued together.
3. The 4K fisheye lens of claim 1 wherein the filter is an infrared cut filter or blue glass.
4. The 4K fisheye lens of claim 1 wherein the refractive index nd1 of the first lens is greater than or equal to 1.90 and abbe number Vd1 is less than or equal to 40; the refractive index nd2 of the second lens is more than or equal to 1.80, and the Abbe number Vd2 is less than or equal to 45; the refractive index nd8 of the eighth lens is less than or equal to 1.65, and the Abbe number Vd8 is more than or equal to 55; the refractive index nd10 of the tenth lens is more than or equal to 1.75, and the Abbe number Vd10 is less than or equal to 40.
5. The 4K fisheye lens of claim 1 wherein the refractive index nd3 of the third lens is greater than or equal to 1.80 and the abbe number Vd3 is less than or equal to 45; the refractive index nd6 of the sixth lens is more than or equal to 1.85, and the Abbe number Vd6 is less than or equal to 45.
6. The 4K fisheye lens of claim 1 wherein the concave surfaces of the third lens and the sixth lens face the object side and the image side.
7. The 4K fisheye lens of claim 1 wherein the fourth lens has a refractive index nd4 of 1.70 or more and an abbe number Vd4 of 30 or less; the refractive index nd5 of the fifth lens is more than or equal to 1.80, and the Abbe number Vd5 is less than or equal to 45; the refractive index nd7 of the seventh lens is less than or equal to 1.65, and the Abbe number Vd7 is less than or equal to 50; the refractive index nd9 of the ninth lens is less than or equal to 1.55, and the Abbe number Vd9 is more than or equal to 65; the refractive index nd11 of the eleventh lens is less than or equal to 1.55, and the Abbe number Vd11 is more than or equal to 65.
8. The 4K fisheye lens of claim 1 wherein the convex surfaces of the fourth lens, the fifth lens, the seventh lens, the ninth lens, and the eleventh lens face the object side and the image side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811226481.2A CN109061841B (en) | 2018-10-22 | 2018-10-22 | 4K fish-eye lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811226481.2A CN109061841B (en) | 2018-10-22 | 2018-10-22 | 4K fish-eye lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109061841A CN109061841A (en) | 2018-12-21 |
| CN109061841B true CN109061841B (en) | 2024-02-06 |
Family
ID=64765166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811226481.2A Active CN109061841B (en) | 2018-10-22 | 2018-10-22 | 4K fish-eye lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109061841B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110221418B (en) * | 2019-07-16 | 2023-11-28 | 厦门爱劳德光电有限公司 | Front-mounted automatic focusing lens for scanning of liquid lens assembly |
| CN110941086B (en) * | 2019-12-19 | 2021-12-28 | 福建福光股份有限公司 | Ultra-short low-distortion shimmer imaging optical system |
| CN112014959B (en) * | 2020-09-22 | 2024-11-26 | 上海理工大学 | A 270-degree fisheye lens system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104007535A (en) * | 2014-06-10 | 2014-08-27 | 舜宇光学(中山)有限公司 | Novel ultra wide angle lens |
| CN106094171A (en) * | 2016-08-08 | 2016-11-09 | 上海大学 | A kind of ultra-large vision field and the fish eye lens of object lens of large relative aperture |
| CN108333730A (en) * | 2018-04-12 | 2018-07-27 | 厦门爱劳德光电有限公司 | A kind of high definition ultra-wide angle day and night confocal camera lens |
| CN208818915U (en) * | 2018-10-22 | 2019-05-03 | 厦门爱劳德光电有限公司 | A kind of 4K fish eye lens |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160187625A1 (en) * | 2014-12-30 | 2016-06-30 | Sheng-Feng Lin | Vis-infrared correctiv fisheye lens system for extreme temperatures |
-
2018
- 2018-10-22 CN CN201811226481.2A patent/CN109061841B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104007535A (en) * | 2014-06-10 | 2014-08-27 | 舜宇光学(中山)有限公司 | Novel ultra wide angle lens |
| CN106094171A (en) * | 2016-08-08 | 2016-11-09 | 上海大学 | A kind of ultra-large vision field and the fish eye lens of object lens of large relative aperture |
| CN108333730A (en) * | 2018-04-12 | 2018-07-27 | 厦门爱劳德光电有限公司 | A kind of high definition ultra-wide angle day and night confocal camera lens |
| CN208818915U (en) * | 2018-10-22 | 2019-05-03 | 厦门爱劳德光电有限公司 | A kind of 4K fish eye lens |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109061841A (en) | 2018-12-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108333730B (en) | High-definition ultra-wide angle day and night confocal lens | |
| TWI689748B (en) | Imaging lens assembly, image capturing unit and electronic device | |
| CN108388004B (en) | A kind of starlight grade high definition day and night confocal optics camera lens | |
| CN106772935B (en) | Lens system and fixed-focus lens | |
| CN107861229B (en) | High definition wide angle unmanned aerial vehicle camera lens | |
| CN208477193U (en) | A kind of high definition ultra-wide angle day and night confocal camera lens | |
| CN109061841B (en) | 4K fish-eye lens | |
| CN108681052B (en) | High-resolution, large-image-plane, small-volume and infrared confocal zoom optical system | |
| CN104459948B (en) | High-image-quality wide-angle optical lens | |
| WO2021027287A1 (en) | Large-aperture lens and terminal device | |
| CN214669836U (en) | A high-resolution glass-plastic hybrid fisheye lens | |
| CN111474689A (en) | Wide-angle lens and panoramic camera system | |
| CN213987004U (en) | Be applied to fisheye camera lens of VR panorama concatenation | |
| CN208818915U (en) | A kind of 4K fish eye lens | |
| CN110441894B (en) | Zoom lens | |
| CN221200082U (en) | 8K ultra-wide angle fixed focus optical system | |
| CN221056743U (en) | 4K large target surface ultra-wide angle fixed focus optical system | |
| CN212433497U (en) | Small-size fisheye optical system with ultra-wide angle, ultra-high pixel and low chromatic aberration and camera module | |
| CN111880292B (en) | Small-volume fisheye camera module with ultra-wide angle, ultra-high pixel and low chromatic aberration | |
| CN111781713B (en) | Ultra-wide-angle ultra-high pixel low-chromatic aberration small-volume fisheye optical system | |
| CN107621689B (en) | Miniaturized fish-eye optical system | |
| CN105137575B (en) | High-low temperature infrared confocal, large-aperture and small-volume optical system | |
| CN208421383U (en) | Ultra-wide-angle high-pixel fisheye optical system and its application camera module | |
| CN216526490U (en) | A high-definition miniaturized day and night confocal lens | |
| CN114063257B (en) | A wide-angle and large aperture adiabatic fixed-focus security lens |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |