CN107894650B - High-resolution day-night confocal large-image-plane optical system - Google Patents
High-resolution day-night confocal large-image-plane optical system Download PDFInfo
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- CN107894650B CN107894650B CN201711225055.2A CN201711225055A CN107894650B CN 107894650 B CN107894650 B CN 107894650B CN 201711225055 A CN201711225055 A CN 201711225055A CN 107894650 B CN107894650 B CN 107894650B
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- 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
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- 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
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/006—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element at least one element being a compound optical element, e.g. cemented elements
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- 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
Abstract
The application discloses a high-resolution day-night confocal large-image-plane optical system, which is sequentially provided with a front lens group, a diaphragm, a rear lens group, an optical filter and a phase-forming surface from left to right along the light incidence direction, wherein the front lens group consists of a first lens, a second lens and a third lens group, and the rear lens group consists of a fourth lens, a fifth lens and a sixth lens; the first, second and fourth lenses have negative optical power; the third, fifth, and sixth lenses have positive optical powers. The high-resolution day-night confocal large-image-plane optical system can achieve the purposes that the optical focal length is 6mm, the aperture F#1.6 is realized, the image plane meets 1/1.8', the total optical length is 23.5mm, and the pixel is 5 million grades; meanwhile, the optical lens of the system has good processing manufacturability; the product cost can be effectively reduced; the system can be widely applied to various fields such as security protection, intelligent home, unmanned operation, industrial imaging and the like.
Description
Technical Field
The present disclosure relates to optical systems, and more particularly to a high resolution day-night confocal large image plane optical system.
Background
Along with the rapid development of modern technology, integrated systems of the integrated system are increasingly developed in the fields of security protection, intelligent home, unmanned driving, industrial imaging and the like in the aspects of high precision, rapid response and the like; an integral system is an imaging system, however, the imaging system has higher and higher requirements on pixels, the CCD/CMOS image surface is bigger and bigger, and the like; the image surface of the current fixed focus lens in the market, especially the M12 trigger interface is generally smaller, such as below 1/2.7'; the products with larger image surfaces are basically less or are very expensive, and the purchasing cost ratio of the products is quite large for mass application.
In view of the above, the invention specially designs a large-image-surface high-pixel optical system, and simultaneously, an infrared confocal function is added in view of all-weather 24 monitoring requirements of the security field.
Disclosure of Invention
The invention aims to provide a high-resolution day-night confocal large-image-plane optical system so as to overcome the defects in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the embodiment of the application discloses a high-resolution day-night confocal large-image-plane optical system, which is sequentially provided with a front lens group, a diaphragm, a rear lens group, an optical filter and a phase-forming surface from left to right along the light incidence direction, wherein the front lens group consists of a first lens, a second lens and a third lens group, and the rear lens group consists of a fourth lens, a fifth lens and a sixth lens; the first, second and fourth lenses have negative optical power; the third, fifth, and sixth lenses have positive optical powers.
Preferably, the first lens and the fourth lens are biconcave lenses, the second lens is a meniscus lens, and the third lens, the fifth lens and the sixth lens are biconvex lenses.
Preferably, the fourth lens and the fifth lens form a group of cemented lens groups through photosensitive adhesive.
Further, the optical power of the cemented lens group is positive.
Preferably, the radii of curvature R1, R2, center thickness D, and optical refractive index Nd of the six lenses satisfy the following conditions:
a first lens: -70-504R 2-60.5-0.7,1.51 Nd-1.55;
a second lens: r1 is more than or equal to 8 and less than or equal to 104, R2 is more than or equal to 60.5, D is more than or equal to 0.7,1.70 and Nd is more than or equal to 1.75;
and a third lens: r1 is more than or equal to 6 and less than or equal to 8-100, R2 is more than or equal to-801.6, D is more than or equal to 1.8,1.80 and Nd is more than or equal to 1.85;
fourth lens: -15-134-60.7-0.9,1.80 Nd-1.85;
a fifth lens: r1 is more than or equal to 4 and less than or equal to 6-8, R2 is more than or equal to-62.5 and D is more than or equal to 2.7,1.61 and Nd is more than or equal to 1.65;
a sixth lens: r1 is more than or equal to 10 and less than or equal to 14-22, R2 is more than or equal to-181.5, D is more than or equal to 1.7,1.76 and Nd is more than or equal to 1.80;
preferably, the optical interval between the first lens and the second lens is 0.7mm, the optical interval between the second lens and the third lens is 1.2mm, the optical interval between the third lens and the diaphragm is 1.7mm, the optical interval between the diaphragm and the fourth lens is 0.4mm, and the optical interval between the fifth lens and the sixth lens is 0.1mm.
Preferably, the third lens is made of ultra-low dispersion optical glass.
Preferably, the filter is an IR-CUT filter, and the imaging surface is CCD/CMOS9.
Compared with the prior art, the high-resolution day-night confocal large-image-plane optical system can achieve the purposes that the optical focal length is 6mm, the aperture F#1.6, the image plane meets 1/1.8', the total optical length is 23.5mm, and the pixel is 5 million grades; meanwhile, the optical lens of the system has good processing manufacturability; the product cost can be effectively reduced; the system can be widely applied to various fields such as security protection, intelligent home, unmanned operation, industrial imaging and the like.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a high resolution day-night confocal large-image-plane optical system according to an embodiment of the invention
FIG. 2 is a schematic diagram of aberration of a high-resolution day-night confocal large-image-plane optical system according to an embodiment of the invention
FIG. 3 is a diagram showing the curvature of field and distortion of a high resolution day-night confocal large-image-plane optical system according to an embodiment of the invention
FIG. 4 is a schematic diagram of the chromatic aberration of the high-resolution day-night confocal large-image-plane optical system according to an embodiment of the invention
Detailed Description
The following detailed description of the technical solutions according to the embodiments of the present invention will be given with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, 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 combination with the high-resolution day-night confocal large-image-plane optical system shown in fig. 1, a front lens group 1, a diaphragm 2, a rear lens group 3, an optical filter 4 and a phase-forming surface 5 are sequentially arranged from left to right along the light incidence direction, wherein the front lens group 1 consists of a first lens 101, a second lens 102 and a third lens 103, and the rear lens group 3 consists of a fourth lens 301, a fifth lens 302 and a sixth lens 303; the first lens 101, the second lens 102, and the fourth lens 301 are negative in optical power; the third lens 103, the fifth lens 302, and the sixth lens 303 are positive in optical power.
Preferably, the first lens 101 and the fourth lens 301 are biconcave lenses, the second lens 102 is a meniscus lens, and the third lens 103, the fifth lens 302, and the sixth lens 303 are biconvex lenses.
Preferably, the fourth lens 301 and the fifth lens 302 form a group of cemented lens groups through photosensitive resin.
Further, the optical power of the cemented lens group is positive.
Preferably, the radii of curvature R1, R2, center thickness D, and optical refractive index Nd of the six lenses satisfy the following conditions:
first lens 101: -70-504R 2-60.5-0.7,1.51 Nd-1.55;
second lens 102: r1 is more than or equal to 8 and less than or equal to 104, R2 is more than or equal to 60.5, D is more than or equal to 0.7,1.70 and Nd is more than or equal to 1.75;
third lens 103: r1 is more than or equal to 6 and less than or equal to 8-100, R2 is more than or equal to-801.6, D is more than or equal to 1.8,1.80 and Nd is more than or equal to 1.85;
fourth lens 301: -15-134-60.7-0.9,1.80 Nd-1.85;
fifth lens 302: r1 is more than or equal to 4 and less than or equal to 6-8, R2 is more than or equal to-62.5 and D is more than or equal to 2.7,1.61 and Nd is more than or equal to 1.65;
sixth lens 303: r1 is more than or equal to 10 and less than or equal to 14-22, R2 is more than or equal to-181.5, D is more than or equal to 1.7,1.76 and Nd is more than or equal to 1.80;
preferably, the optical interval between the first lens 101 and the second lens 102 is 0.7mm, the optical interval between the second lens 102 and the third lens 103 is 1.2mm, the optical interval between the third lens 103 and the diaphragm 2 is 1.7mm, the optical interval between the diaphragm 2 and the fourth lens 301 is 0.4mm, and the optical interval between the fifth lens 302 and the sixth lens 303 is 0.1mm.
Preferably, the third lens 103 is made of ultra-low dispersion optical glass.
In this technical scheme, the third lens 103 is made of ultra-low dispersion optical glass, and can be used to balance the best focal planes of visible light wavelengths 400-700nm and infrared light wavelengths 840-860 nm.
Preferably, the filter 4 is an IR-CUT filter, and the imaging surface 5 is a CCD/CMOS9.
In this solution, the filter 4 is used to compensate for the glass thickness of the IR-CUT switch attached to the camera, and the imaging plane 5 is a CCD/CMOS surface to protect the glass thickness.
Fig. 2, 3 and 4 show aberration diagrams, field curvature diagrams and distortion diagrams and position aberration diagrams of a high-resolution day-night confocal large-image-plane optical system according to an embodiment of the invention
In summary, the high-resolution day-night confocal large-image-plane optical system can realize the purposes that the optical focal length is 6mm, the aperture F#1.6, the image plane meets 1/1.8', the total optical length is 23.5mm, and the pixel is 5 million grades; meanwhile, the optical lens of the system has good processing manufacturability; the product cost can be effectively reduced; the system can be widely applied to various fields such as security protection, intelligent home, unmanned operation, industrial imaging and the like.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is merely exemplary of the application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the application and are intended to be comprehended within the scope of the application.
Claims (4)
1. A high-resolution day-night confocal large-image-plane optical system is characterized in that: the front lens group consists of a first lens, a second lens and a third lens, and the rear lens group consists of a fourth lens, a fifth lens and a sixth lens; the first, second and fourth lenses have negative optical power; the third, fifth and sixth lenses have positive optical power;
the first lens and the fourth lens are biconcave lenses, the second lens is a meniscus lens, and the third lens, the fifth lens and the sixth lens are biconvex lenses;
the radii of curvature of the object side surface and the image side surface of the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are respectively R1 and R2, the optical refractive index N, the Abbe coefficient Vd and the lens thickness D sequentially satisfy:
a first lens: -70-50R 1-, 4-6R 2-, 0.5-0.7,1.51-Nd-1.55;
a second lens: r1 is more than or equal to 8 and less than or equal to 10, R2 is more than or equal to 4 and less than or equal to 6, D is more than or equal to 0.5 and less than or equal to 0.7,1.70 and Nd is more than or equal to 1.75;
and a third lens: r1 is more than or equal to 6 and less than or equal to 8, R2 is more than or equal to-100 and less than or equal to 80,1.6, D is more than or equal to 1.8,1.80 and Nd is more than or equal to 1.85;
fourth lens: -15-13R 1-4-6,0.7-0.9,1.80 Nd-1.85;
a fifth lens: r1 is more than or equal to 4 and less than or equal to 6, R2 is more than or equal to-8 and less than or equal to 6,2.5, D is more than or equal to 2.7,1.61 and Nd is more than or equal to 1.65;
a sixth lens: r1 is more than or equal to 10 and less than or equal to 14, R2 is more than or equal to-22 and less than or equal to-18,1.5, D is more than or equal to 1.7,1.76 and Nd is more than or equal to 1.80;
wherein the unit of the curvature radius of all lenses and the thickness of the lenses is mm:
an optical interval between the first lens and the second lens is 0.7mm, an optical interval between the second lens and the third lens is 1.2mm, an optical interval between the third lens and the diaphragm is 1.7mm, an optical interval between the diaphragm and the fourth lens is 0.4mm, and an optical interval between the fifth lens and the sixth lens is 0.1mm;
the fourth lens and the fifth lens form a group of cemented lens groups through photosensitive adhesive.
2. The high resolution day-night confocal large-image-plane optical system of claim 1, wherein: the focal power of the cemented lens group is positive.
3. The high resolution day-night confocal large-image-plane optical system of claim 1, wherein: the third lens is made of ultra-low dispersion optical glass.
4. The high resolution day-night confocal large-image-plane optical system of claim 1, wherein: the optical filter is an IR-CUT optical filter, and the imaging surface is CCD/CMOS.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711225055.2A CN107894650B (en) | 2017-11-29 | 2017-11-29 | High-resolution day-night confocal large-image-plane optical system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711225055.2A CN107894650B (en) | 2017-11-29 | 2017-11-29 | High-resolution day-night confocal large-image-plane optical system |
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| CN107894650A CN107894650A (en) | 2018-04-10 |
| CN107894650B true CN107894650B (en) | 2023-08-08 |
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| CN114879344B (en) * | 2022-05-23 | 2023-08-22 | 东莞市宇瞳汽车视觉有限公司 | Fixed focus lens |
Citations (4)
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|---|---|---|---|---|
| JP2009258157A (en) * | 2008-04-11 | 2009-11-05 | Nikon Corp | Photographing lens, optical equipment having photographing lens, and imaging method |
| CN202916486U (en) * | 2012-11-08 | 2013-05-01 | 中山联合光电科技有限公司 | Economic optical system with high definition resolution and capable of being used day and night |
| CN103543517A (en) * | 2013-11-11 | 2014-01-29 | 厦门爱劳德光电有限公司 | Wide-angle and high-resolution small optics lens |
| CN105204142A (en) * | 2015-09-18 | 2015-12-30 | 苏州莱能士光电科技有限公司 | High-resolution and ultra-wide field fish-eye lens optical system with day-and-night confocal function |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9638889B2 (en) * | 2014-03-24 | 2017-05-02 | Sintai Optical (Shenzhen) Co., Ltd. | Lens assembly |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009258157A (en) * | 2008-04-11 | 2009-11-05 | Nikon Corp | Photographing lens, optical equipment having photographing lens, and imaging method |
| CN202916486U (en) * | 2012-11-08 | 2013-05-01 | 中山联合光电科技有限公司 | Economic optical system with high definition resolution and capable of being used day and night |
| CN103543517A (en) * | 2013-11-11 | 2014-01-29 | 厦门爱劳德光电有限公司 | Wide-angle and high-resolution small optics lens |
| CN105204142A (en) * | 2015-09-18 | 2015-12-30 | 苏州莱能士光电科技有限公司 | High-resolution and ultra-wide field fish-eye lens optical system with day-and-night confocal function |
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