CN114967052A - Fixed focus video monitoring lens - Google Patents
Fixed focus video monitoring lens Download PDFInfo
- Publication number
- CN114967052A CN114967052A CN202210372903.7A CN202210372903A CN114967052A CN 114967052 A CN114967052 A CN 114967052A CN 202210372903 A CN202210372903 A CN 202210372903A CN 114967052 A CN114967052 A CN 114967052A
- Authority
- CN
- China
- Prior art keywords
- lens
- video monitoring
- light
- thickness
- fixed
- 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.)
- Granted
Links
- 238000012544 monitoring process Methods 0.000 title claims abstract description 53
- 230000003287 optical effect Effects 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims description 13
- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000003384 imaging method Methods 0.000 abstract description 32
- 238000005286 illumination Methods 0.000 abstract description 13
- 239000013589 supplement Substances 0.000 abstract description 6
- 239000005304 optical glass Substances 0.000 abstract 2
- 238000003333 near-infrared imaging Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000011521 glass Substances 0.000 description 4
- 230000004075 alteration Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 2
- 230000006399 behavior Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035807 sensation Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
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
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
-
- 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
- G02B13/005—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having spherical lenses only
-
- 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
- G02B13/008—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras designed for infrared light
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/14—Optical objectives specially designed for the purposes specified below for use with infrared or ultraviolet radiation
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Lenses (AREA)
Abstract
The invention provides a fixed-focus video monitoring lens, which comprises 6 optical glass lenses, wherein the optical glass lenses are sequentially negative, positive, negative and positive focal powers along the incident direction of light; the focal length of the lens is 14mm, the image F number is 2.2, the field angle is 32 degrees, and the total optical length of the system is 32.2 mm; the lens works in a visible near-infrared band, the working wavelength range is 400 nm-1000 nm, clear imaging of a wide band can be realized, and a near-infrared lamp can be used for light supplement at night or in a low-illumination environment to ensure imaging quality; the object distance of the lens is set to be 2.5m, and the lens is mainly used for video monitoring of the conditions of doorways such as brand exclusive shops and the like; the lens comprises 6 lenses, wherein 2 lenses form 1 cemented lens, and all the lenses are spherical; the lens has the advantages of wide-band imaging, high-quality imaging, miniaturization and the like.
Description
Technical Field
The invention relates to the technical field of optical design, in particular to a fixed-focus video monitoring lens.
Background
The video monitoring lens is an important component forming a safety precaution system and has important application value. With the introduction of the concept of smart cities, the fields of smart transportation, public safety, visual management and the like are rapidly developed. The application of video monitoring in the field of public security is divided into multiple aspects, for example, video data acquired through a video monitoring lens can be used for investigation and evidence collection, and illegal behaviors are revealed through comparative analysis of time, geography, space and the like. The video data acquired by the public security platform is stored in the video big data platform, the face retrieval function can be realized through the stored face database, and the face analysis and comparison can be efficiently carried out. The definition of the video data directly affects whether the whole system can normally operate, and the quality of the video data is mainly determined by a video monitoring lens.
At present, the requirement of brand monopoly stores on the video monitoring at the door is higher and higher, and the brand monopoly stores can analyze the video data at the door of the monopoly stores in a reasonable and legal manner, so that the brand monopoly stores can be guided to provide more personalized services for consumers. General video monitoring camera lens work is in the visible light wave band, can only guarantee the formation of image quality through the mode of light filling at night or when illumination is insufficient, but adopts the visible light filling to cause dazzling sensation to the consumer easily, influences the consumer and gets into shop and experience.
At present, video monitoring is not rare by adopting a near-infrared lens, and the near-infrared lens adopts infrared ray imaging, so that good imaging quality can be ensured. The main advantage of near-infrared imaging is that a near-infrared lamp can be used for light supplement when the illumination intensity is insufficient, the imaging quality is guaranteed, and the near-infrared imaging system is harmless and non-dazzling to human eyes. The visible near-infrared fixed-focus video monitoring lens is designed by combining visible light imaging and near-infrared imaging, video monitoring is carried out through visible light when illumination is sufficient, light is supplemented through an infrared lamp when illumination is insufficient, and video monitoring is achieved through infrared light imaging.
Disclosure of Invention
The embodiment of the invention provides a fixed-focus video monitoring lens, which has a working wavelength range of 400-1000 nm, adopts visible light to carry out video monitoring when the illumination condition is good, carries out light supplement through a near-infrared lamp when the illumination condition is not good, and then carries out video monitoring through near-infrared light. The lens is designed by 6 spherical lenses, and the processing difficulty and the cost are lower. When the lens is designed, all aberrations are corrected and balanced, and the final lens has the advantages of wide-band imaging, high-quality imaging, miniaturization and the like.
The embodiment of the invention provides a fixed-focus video monitoring lens which comprises a first negative lens, a first positive lens, a second negative lens, a second positive lens, a third positive lens and a third negative lens which are coaxially arranged in sequence along the incident direction of light; the material of the first negative lens is HZF1A _ CDGM, 14.0mm < light-passing aperture <15.0mm, 4.0mm < thickness <5.0 mm; the material of the first positive lens is NLAF2_ SCHOTT, 6.0mm < light-passing aperture <7.0mm, 3.5mm < thickness <4.5 mm; the material of the second negative lens is ZF5_ CDGM, 5.0mm < the light-passing aperture <6.0mm, 1.0mm < the thickness <2.0 mm; the material of the second positive lens is SLAL56_ OHARA, 6.5mm < light-passing aperture <7.5mm, 3.5mm < thickness <4.5 mm; the third positive lens is made of NLAF2_ SCHOTT, the light transmission aperture is 7.5mm <8.5mm, the thickness is 2.5mm <3.5 mm; the third negative lens is made of SF4_ SCHOTT, the light transmission aperture is 7.5mm <8.5mm, and the thickness is 3.0mm <4.0 mm.
Optionally, the clear aperture of the first negative lens is 14.2mm, and the thickness of the first negative lens is 4.5 mm; the light-transmitting aperture of the first positive lens is 9.1mm, and the thickness of the first positive lens is 4.0 mm; the clear aperture of the second negative lens is 5.4mm, and the thickness of the second negative lens is 1.5 mm; the light-transmitting aperture of the second positive lens is 7.3mm, and the thickness of the second positive lens is 4.3 mm; the light-transmitting aperture of the third positive lens is 8.1mm, and the thickness of the third positive lens is 2.9 mm; the light-transmitting aperture of the third negative lens is 8.1mm, and the thickness of the third negative lens is 3.5 mm.
Optionally, the second negative lens and the second positive lens constitute one cemented lens.
Optionally, the distance between the center of the light exit surface of the third negative lens and the image plane is 6 mm.
Optionally, the optical outline dimension of the fixed-focus video monitoring lens is phi 14.2 × 32.2 mm.
Optionally, the focal length of the system of the fixed-focus video monitoring lens is 14mm, and the F number is 2.2.
Optionally, the working wavelength range of the fixed-focus video monitoring lens is 400 nm-1000 nm.
Optionally, the fixed focus video monitors the full field of view of the lens at 32 °.
According to the technical scheme, the embodiment of the invention has the following advantages:
1. the fixed focus video monitoring lens has the working wave band range of 400 nm-1000 nm and has the advantage of visible near-infrared broadband imaging. Visible light imaging and near-infrared imaging are combined, video monitoring is achieved through visible light imaging when illumination is sufficient, a near-infrared lamp is adopted for light supplement when illumination is insufficient, and video monitoring is achieved mainly through near-infrared light wave imaging.
2. The fixed-focus video monitoring lens has the object distance of 2.5m, and meets the use requirement of the gate video monitoring of the brand exclusive shops. The lens adopts spherical glass lenses, so that the processing difficulty and cost are reduced, all types of aberrations are corrected and balanced during design, and the imaging quality of the lens is good. The focal length of the lens is 14mm, the F number is 2.2, the field angle is 32 degrees, the optical total length of the lens is 32.2mm, and the lens has the advantages of high imaging quality, miniaturization and the like.
Drawings
Fig. 1 is a light path structure diagram of a fixed focus video monitoring lens according to the present invention.
Fig. 2 is a dot-column diagram of the fixed-focus video surveillance lens of the present invention.
Fig. 3 is an optical modulation transfer function of the fixed focus video monitoring lens of the present invention.
Reference numerals: 1-a first negative lens; 2-a first positive lens; STO-diaphragm; 3-a second negative lens; 4-a second positive lens; 5-a third positive lens; 6-third negative lens; IMA-the image plane.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.
Referring to fig. 1, which is a diagram of an optical path structure of the present invention, the fixed focus video monitoring lens includes 6 glass lenses arranged in a negative, positive, and negative manner, and all the lenses are spherical, so as to reduce the processing difficulty and cost and ensure good imaging quality. The 6 glass lenses comprise a first negative lens 1, a first positive lens 2, a second negative lens 3, a second positive lens 4, a third positive lens 5 and a third negative lens 6 which are coaxially arranged in sequence along the incident direction of light; the material of the first negative lens 1 is HZF1A _ CDGM, 14.0mm < light-passing aperture <15.0mm, 4.0mm < thickness <5.0 mm; the material of the first positive lens 2 is NLAF2_ SCHOTT, 6.0mm < light-passing aperture <7.0mm, 3.5mm < thickness <4.5 mm; the material of the second negative lens 3 is ZF5_ CDGM, 5.0mm < the light-passing aperture <6.0mm, 1.0mm < the thickness <2.0 mm; the material of the second positive lens 4 is SLAL56_ OHARA, 6.5mm < light-passing aperture <7.5mm, 3.5mm < thickness <4.5 mm; the third positive lens 5 is made of NLAF2_ SCHOTT, the light transmission aperture is 7.5mm <8.5mm, the thickness is 2.5mm <3.5 mm; the third negative lens 6 is made of SF4_ SCHOTT, the light transmission aperture is 7.5mm <8.5mm, and the thickness is 3.0mm <4.0 mm.
In one embodiment, the clear aperture of the first negative lens 1 is 14.2mm, and the thickness is 4.5 mm; the light-transmitting aperture of the first positive lens 2 is 9.1mm, and the thickness of the first positive lens is 4.0 mm; the light-transmitting aperture of the second negative lens 3 is 5.4mm, and the thickness of the second negative lens is 1.5 mm; the light-transmitting aperture of the second positive lens 4 is 7.3mm, and the thickness of the second positive lens is 4.3 mm; the light-transmitting aperture of the third positive lens 5 is 8.1mm, and the thickness of the third positive lens is 2.9 mm; the light-transmitting caliber of the third negative lens 6 is 8.1mm, and the thickness of the third negative lens is 3.5 mm. Therefore, the focal length of the system of the fixed-focus video monitoring lens is 14mm, the F number is 2.2, the full field angle is 32 degrees, the external dimension is phi 14.2 multiplied by 32.2mm, and the lens has the advantages of wide-band imaging, high-quality imaging, miniaturization and the like.
In one embodiment, the second negative lens 3 and the second positive lens 4 form a cemented lens, and the optical materials of the two lenses are matched to realize good correction of chromatic aberration of the lens.
In one embodiment, the fixed-focus video monitoring lens has a working wavelength range of 400 nm-1000 nm and has the advantage of visible near-infrared broadband imaging. The visible light imaging and the near-infrared imaging are combined, video monitoring is achieved through visible light imaging when the illumination is sufficient, a near-infrared lamp is adopted for light supplement when the illumination is insufficient, and video monitoring is achieved mainly through near-infrared light wave imaging.
In the embodiment of the invention, the object distance of the fixed-focus video monitoring lens is 2.5m, so that the use requirement of the video monitoring at the gate of the brand exclusive shop is met
Referring to fig. 2, which is a dot-sequence diagram of the fixed-focus video surveillance lens of the present invention, it can be seen from the diagram that the imaging speckle RMS corresponding to each field angle is smaller than 12 μm, which indicates that the imaging quality of the lens is good.
Referring to fig. 3, it can be seen that MTF of each field is higher than 0.2 in the spatial frequency range within 120cycles/mm for the optical modulation transfer function MTF of the fixed-focus video monitoring lens of the present invention, which meets the design requirement of the video monitoring lens.
Hereinafter, lens data of the fixed focus video surveillance lens is shown. Table 1 shows the relevant optical parameters of each glass lens in the fixed focus video surveillance lens.
TABLE 1
The fixed-focus video monitoring lens has the focal length of 14mm, the F number of 2.2, the field angle of 32 degrees and the total optical length of 32.2 mm. The fixed-focus video monitoring lens works in a visible near-infrared band, has a wavelength range of 400 nm-1000 nm, and has the advantage of wide-band imaging. The visible light imaging and the near-infrared imaging are combined, video monitoring is achieved through visible light imaging when the illumination is sufficient, a near-infrared lamp is adopted for light supplement when the illumination is insufficient, and video monitoring is achieved mainly through near-infrared light wave imaging. The lens has the advantages of wide-band imaging, high-quality imaging, miniaturization and the like.
The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.
Claims (8)
1. The utility model provides a tight focus video monitoring camera lens which characterized in that: the lens comprises a first negative lens, a first positive lens, a second negative lens, a second positive lens, a third positive lens and a third negative lens which are coaxially arranged in sequence along the incident direction of light;
the material of the first negative lens is HZF1A _ CDGM, 14.0mm < light-passing aperture <15.0mm, 4.0mm < thickness <5.0 mm;
the material of the first positive lens is NLAF2_ SCHOTT, 6.0mm < light-passing aperture <7.0mm, 3.5mm < thickness <4.5 mm;
the material of the second negative lens is ZF5_ CDGM, 5.0mm < the light-passing aperture <6.0mm, 1.0mm < the thickness <2.0 mm;
the material of the second positive lens is SLAL56_ OHARA, 6.5mm < light-passing aperture <7.5mm, 3.5mm < thickness <4.5 mm;
the third positive lens is made of NLAF2_ SCHOTT, the light transmission aperture is 7.5mm <8.5mm, the thickness is 2.5mm <3.5 mm;
the third negative lens is made of SF4_ SCHOTT, the light transmission aperture is 7.5mm <8.5mm, and the thickness is 3.0mm <4.0 mm.
2. The fixed-focus video monitoring lens according to claim 1, characterized in that:
the clear aperture of the first negative lens is 14.2mm, and the thickness of the first negative lens is 4.5 mm;
the light-transmitting aperture of the first positive lens is 9.1mm, and the thickness of the first positive lens is 4.0 mm;
the light-transmitting aperture of the second negative lens is 5.4mm, and the thickness of the second negative lens is 1.5 mm;
the light-transmitting aperture of the second positive lens is 7.3mm, and the thickness of the second positive lens is 4.3 mm;
the light-transmitting aperture of the third positive lens is 8.1mm, and the thickness of the third positive lens is 2.9 mm;
the light-transmitting aperture of the third negative lens is 8.1mm, and the thickness of the third negative lens is 3.5 mm.
3. The fixed-focus video monitoring lens according to claim 1, characterized in that: the second negative lens and the second positive lens constitute a cemented lens.
4. The fixed-focus video monitoring lens according to claim 1, characterized in that: and the distance between the center of the light emergent surface of the third negative lens and the image surface is 6 mm.
5. The fixed-focus video monitoring lens according to claim 1, characterized in that: the optical external dimension of the fixed-focus video monitoring lens is phi 14.2 multiplied by 32.2 mm.
6. The fixed-focus video monitoring lens according to claim 1, characterized in that: the focal length of the system of the fixed-focus video monitoring lens is 14mm, and the F number is 2.2.
7. The fixed-focus video monitoring lens according to claim 1, characterized in that: the working wavelength range of the fixed-focus video monitoring lens is 400 nm-1000 nm.
8. The fixed-focus video monitoring lens according to claim 1, characterized in that: the full field of view of the fixed focus video surveillance lens is 32.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210372903.7A CN114967052B (en) | 2022-04-11 | 2022-04-11 | Fixed-focus video monitoring lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210372903.7A CN114967052B (en) | 2022-04-11 | 2022-04-11 | Fixed-focus video monitoring lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114967052A true CN114967052A (en) | 2022-08-30 |
| CN114967052B CN114967052B (en) | 2023-09-15 |
Family
ID=82978070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210372903.7A Active CN114967052B (en) | 2022-04-11 | 2022-04-11 | Fixed-focus video monitoring lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114967052B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201273961Y (en) * | 2008-03-10 | 2009-07-15 | 富士能株式会社 | Image taking lens and image taking apparatus |
| CN103345043A (en) * | 2013-06-26 | 2013-10-09 | 东莞市宇瞳光学科技有限公司 | Day and night dual-purpose focusing monitoring camera |
| US20150177494A1 (en) * | 2013-12-25 | 2015-06-25 | Fujifilm Corporation | Imaging lens and imaging apparatus |
| CN107843974A (en) * | 2017-11-29 | 2018-03-27 | 中国科学院西安光学精密机械研究所 | A kind of strong optical system of environmental suitability |
| CN108508571A (en) * | 2017-02-28 | 2018-09-07 | 宁波舜宇车载光学技术有限公司 | Imaging system lens group |
| CN110333592A (en) * | 2019-07-23 | 2019-10-15 | 福建福光天瞳光学有限公司 | A kind of small size optical system and its imaging method |
| WO2020107759A1 (en) * | 2018-11-28 | 2020-06-04 | 宁波舜宇车载光学技术有限公司 | Optical lens and imaging device |
| CN112014946A (en) * | 2019-05-31 | 2020-12-01 | 宁波舜宇车载光学技术有限公司 | Optical lens and imaging apparatus |
| CN113741013A (en) * | 2021-09-17 | 2021-12-03 | 青岛理工大学 | Telescope lens of visible light imaging spectrometer |
-
2022
- 2022-04-11 CN CN202210372903.7A patent/CN114967052B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201273961Y (en) * | 2008-03-10 | 2009-07-15 | 富士能株式会社 | Image taking lens and image taking apparatus |
| CN103345043A (en) * | 2013-06-26 | 2013-10-09 | 东莞市宇瞳光学科技有限公司 | Day and night dual-purpose focusing monitoring camera |
| US20150177494A1 (en) * | 2013-12-25 | 2015-06-25 | Fujifilm Corporation | Imaging lens and imaging apparatus |
| CN108508571A (en) * | 2017-02-28 | 2018-09-07 | 宁波舜宇车载光学技术有限公司 | Imaging system lens group |
| CN107843974A (en) * | 2017-11-29 | 2018-03-27 | 中国科学院西安光学精密机械研究所 | A kind of strong optical system of environmental suitability |
| WO2020107759A1 (en) * | 2018-11-28 | 2020-06-04 | 宁波舜宇车载光学技术有限公司 | Optical lens and imaging device |
| CN112014946A (en) * | 2019-05-31 | 2020-12-01 | 宁波舜宇车载光学技术有限公司 | Optical lens and imaging apparatus |
| CN110333592A (en) * | 2019-07-23 | 2019-10-15 | 福建福光天瞳光学有限公司 | A kind of small size optical system and its imaging method |
| CN113741013A (en) * | 2021-09-17 | 2021-12-03 | 青岛理工大学 | Telescope lens of visible light imaging spectrometer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114967052B (en) | 2023-09-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6538201B2 (en) | Wide-angle lens for shooting | |
| TWI601994B (en) | Imaging optical lens assembly, image capturing apparatus and electronic device | |
| TWI607238B (en) | Optical imaging system, imaging apparatus and electronic device | |
| TWI472825B (en) | Image capturing lens system, imaging device and mobile terminal | |
| KR20160108080A (en) | Photographing lens system and photographing apparatus having the same | |
| TWI564612B (en) | Imaging optical system, image capturing apparatus and electronic device | |
| CN102177468A (en) | Three-mirror panoramic camera | |
| US11307390B2 (en) | Optical lens | |
| US20130242411A1 (en) | Photographic lens optical system | |
| CN111061046B (en) | Infrared optical imaging lens and imaging device | |
| CN105807402B (en) | A kind of near-infrared optical lens group | |
| CN209356747U (en) | A kind of big target surface wide-angle lens optical system | |
| KR20140003129A (en) | Fast lens for near infrared ray | |
| US20220099926A1 (en) | 9 Million Pixel Black Light Full-color Lens | |
| KR100463133B1 (en) | Wide-angle lens | |
| CN110850552B (en) | Optical imaging lens and imaging apparatus | |
| CN114967052A (en) | Fixed focus video monitoring lens | |
| CN108267840A (en) | Optical imaging system | |
| CN112630944B (en) | Optical lens and imaging apparatus | |
| KR101773815B1 (en) | Super wide small optical system for short object distance | |
| KR20120071797A (en) | A super wide angle camera lens for surveillance | |
| CN110286475A (en) | A kind of ultra-wide angle projection objective being applicable in the mini Room | |
| CN114967051B (en) | Face recognition lens | |
| CN211554456U (en) | Lens group, camera lens, camera module and electronic equipment | |
| CN117492185B (en) | Optical imaging lens, camera module and terminal equipment |
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 |