CN202433590U - High-resolution monitoring lens capable of using in the day and at night - Google Patents
High-resolution monitoring lens capable of using in the day and at night Download PDFInfo
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- CN202433590U CN202433590U CN2011203857390U CN201120385739U CN202433590U CN 202433590 U CN202433590 U CN 202433590U CN 2011203857390 U CN2011203857390 U CN 2011203857390U CN 201120385739 U CN201120385739 U CN 201120385739U CN 202433590 U CN202433590 U CN 202433590U
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Abstract
The utility model relates to a high-resolution monitoring lens capable of using in the day and at night. The high-resolution monitoring lens capable of using in the day and at night includes a meniscus first lens element having negative focal power and protruding towards an object side; a biconcave or meniscus second lens element having negative focal power; a biconcave third lens element having positive focal power; a diaphragm arranged behind the third lens element; a biconcave fourth lens element having positive focal power; a lens assembly formed by jointing a fifth lens element and a sixth lens element and having positive focal power. The first lens element, the second lens element, the third lens element, the diaphragm, the fourth lens element, and the lens assembly composed of the fifth lens element and the sixth lens element are arranged successively from the side facing towards an object. The fifth lens element having positive focal power is close to the fourth lens element. The sixth lens element having negative focal power is behind the fifth lens element. The high-resolution monitoring lens capable of using in the day and at night provided by the utility model overcomes shortcomings of the prior art and has a compact structure, large field angle, and high imaging quality. And by using the high-resolution monitoring lens capable of using in the day and at night provided by the utility model, no focal plane drift of visible light and infrared light occurs and the production technique requirements are low.
Description
[technical field]
The present invention relates to a kind of day and night type high definition safety monitoring lens system, be particularly suitable for safety monitoring camera and the drive recorder image system objective body kept watch on under the night low-light (level).
[background technology]
Along with the rapid emergence in safety monitoring market in this year, digital handle and the optimization of network transfer speeds promotes, the quality requirements of safety monitoring camera lens is improved the discriminating from common supervision demand to high definition greatly.Under the details in a play not acted out on stage, but told through dialogues environment of low-light (level), adopt the near infrared floor light to require the clear bright and sharp of picture equally.
The safety monitoring camera lens is general at present adopts 4 to 8 eyeglasses to form; But this wide-angle safety monitoring Lens is bigger; Resolution can not satisfy the needs of the above CCD of mega pixel, and image quality is smudgy especially under the low-light (level) environment can not satisfy customer requirement small size and high performance requirement.Therefore, adopt the plastic aspherical element technology, with weight reduction, cost with reduce deflection, but its logical optical property a little less than, Tool and Die Technology is strict, influenced greatly by ambient temperature, can't satisfy to keep perfect imaging definition.
[summary of the invention]
The present invention seeks to overcome deficiency of the prior art and a kind of compact conformation is provided, field angle is big, image quality is high, the focal plane drift of visible light and near infrared light, day and night type high resolving power watching lens that manufacturing technique requirent is low.
In order to solve the technical matters of above-mentioned existence, the present invention adopts following technical proposal:
A kind of day, night dual-purpose type high resolving power watching lens, it is characterized in that beginning to be provided with successively from a side towards thing:
Have negative focal power and protruding first lens element 1 that is falcate towards object space;
Has the 3rd lenticular lens element 3 of being of positive focal power;
Be provided with aperture member 4 in the 3rd lens element 3 back;
Has the 4th lenticular lens element 5 of being of positive focal power;
Engage the lens subassembly of forming by the 5th lens element 6 and the 6th lens element 7 with positive light coke; The 5th lens element 6 that wherein has positive light coke is near the 4th lens element 5, and the 6th lens element 7 with negative power is in the 5th lens element 6 back.
Dual-purpose type high resolving power watching lens is characterized in that with the aperture member aforesaid a kind of day, night being that the boundary is divided into forward and backward two groups to camera lens, wherein before the set of contact lenses combined focal length use f
fExpression, back set of contact lenses combined focal length is used f
bExpression, then two groups of combined focal length ratios meet the following conditions :-2≤f
f/ f
b≤-0.6.
Aforesaid a kind of day, night dual-purpose type high resolving power watching lens, set of contact lenses combined focal length f before it is characterized in that
fF meets the following conditions with this camera lens effective focal length :-3≤f
f/ f≤-1.8.
Aforesaid a kind of day, night, dual-purpose type high resolving power watching lens is characterized in that back set of contact lenses combined focal length f
bF meets the following conditions with this camera lens effective focal length: 1≤f
b/ f≤2.6.
Aforesaid a kind of day, night dual-purpose type high resolving power watching lens; The back work distance that it is characterized in that said camera lens meets the following conditions from d and camera lens effective focal length f: 1.8≤d/f≤3; Wherein d is BFL, and BFL is the distance of the 5th lens element picture side side outermost point to imaging surface of said wide-angle safety monitoring camera lens.
Aforesaid a kind of day, night, dual-purpose type high resolving power watching lens it is characterized in that said aperture member 4 between the 3rd lens element 3 and the 4th lens element 5, and aperture member 4 was near the 4th lens element 5 one sides.
Aforesaid a kind of day, night, dual-purpose type high resolving power watching lens is characterized in that said the 3rd lens abbe number Vd less than 24, and said the 4th index of refraction in lens Nd is greater than 1.8.
Aforesaid a kind of day, night, dual-purpose type high resolving power watching lens is characterized in that said the 3rd lens element 3 and the 4th lens element 5 are that thick lens and center of lens thickness t and lens focus f satisfy following relation condition: 1≤t/f≤2.
Aforesaid a kind of day, night dual-purpose type high resolving power watching lens, the focal power that it is characterized in that said lens subassembly is a positive light coke, the convex surface on this lens subassembly composition surface is side towards picture side; This lens construction f-number F#≤2.0, this lens construction field angle FOV>=120 °, first lens element 1 is the convex surface that is used for control system distortion size towards the r1 face of object plane.
Aforesaid a kind of day, night dual-purpose type high resolving power watching lens, it is characterized in that said first, second, third and fourth, the spectral transmittance of five, six lens elements is to visible light F, d, C and near infrared spectrum all have good permeability; Spectral transmittance is to visible light F, and d, C and near infrared spectrum carry out aberration correction; Realize that visible light and near infrared light wave band focus on same focal plane; Wherein F is that optical wavelength is the visible light of 486nm, and d is that optical wavelength is the visible light of 588nm, and C is that optical wavelength is the visible light of 685nm; And the optical wavelength of near infrared light is 830nm or 850nm or 870nm.
The present invention compared with prior art has following advantage:
The invention solves the problems referred to above; It comprises six lens elements and diaphragm, by the thing side to being as side: have negative power and convex surface and form towards first lens element of object space, second lens element, the 3rd lens element, the lens subassembly that has the 3rd lens element of positive light coke and have a positive light coke with positive light coke with negative power.Aperture member is between the 3rd lens element and the 4th lens element and near the 4th lens element one side.
Through this configuration; Just eyeglass quantity that can enough minimums reaches gratifying optical characteristics, than wide visual field angle, bigger f-number and less portrait distortion; Realized visible light and near infrared while aberration correction are realized mega pixel high definition image quality imaging requirements.
[description of drawings]
Fig. 1 is a structural representation of the present invention, (object space is in left-most position, is in right-most position as the side).
Fig. 2 is the axial chromatic aberration curve map of visible light part of the present invention.
Fig. 3 is the axial chromatic aberration curve map of infrared light part of the present invention.
Fig. 4 is the chromatic longitudiinal aberration curve map of visible light part of the present invention.
Fig. 5 is the chromatic longitudiinal aberration curve map of infrared light part of the present invention.
Fig. 6 is the astigmatism and the distortion curve figure of visible light part of the present invention.
Fig. 7 is the astigmatism and the distortion curve figure of infrared light part of the present invention.
Fig. 8 is the MTF curve map of visible light part of the present invention.
Fig. 9 is the MTF curve map of infrared light part of the present invention.
[embodiment]
Describe the present invention below in conjunction with accompanying drawing:
As shown in the figure, a kind of day, night dual-purpose type high resolving power watching lens, begin to be provided with successively from a side towards thing:
Have negative focal power and protruding first lens element 1 that is falcate towards object space.Second lens element 2 that is concave-concave or falcate with negative focal power.Has the 3rd lenticular lens element 3 of being of positive focal power.Be provided with aperture member 4 in the 3rd lens element 3 back.Has the 4th lenticular lens element 5 of being of positive focal power.
Engage the lens subassembly of forming by the 5th lens element 6 and the 6th lens element 7 with positive light coke; The 5th lens element 6 that wherein has positive light coke is near the 4th lens element 5, and the 6th lens element 7 with negative power is in the 5th lens element 6 back.In addition, also include infrared fileter 8 and imaging surface 9.
Specifically, first lens element 1, it has negative focal power, is that the two sides all is a sphere, and is convex surface towards object plane r1 face, is the glass lens element of concave surface towards image planes r2 face.
The 3rd lens element 3, it has positive focal power, is that the two sides all is the convex surface sphere, and is convex surface towards object plane r5 face, is the glass lens element of convex surface towards image planes r6 face.
The 4th lens element 5, it has positive focal power, is that the two sides all is a convex surface, and is convex surface towards object plane r8 face, is the glass lens element of convex surface towards image planes r9 face.
The 5th lens element 6, it has positive focal power, is the two sides convex surface, and is convex surface towards object plane r10 face, is the spherical lens elements of concave surface towards image planes r11 face.
The 6th lens element 7; It has negative focal power; Be that the two sides all is the falcate sphere; And towards object plane r11 face is concave surface, is the glass lens element of convex surface towards image planes r12 face, and the 5th lens element and the 6th passes through element and closes towards the face that connects as square side through convex surface and carry out the joint lens combination that bonding composition has positive light coke.
With aperture member 4 is that the boundary is divided into forward and backward two groups to camera lens, and promptly the side near thing is preceding set of contact lenses, is the back set of contact lenses near a side of picture.Wherein preceding set of contact lenses combined focal length is used f
fExpression, back set of contact lenses combined focal length is used f
bExpression, then two groups of combined focal length ratios meet the following conditions :-2≤f
f/ f
b≤-0.6.
In addition, preceding set of contact lenses combined focal length f
fF meets the following conditions with this camera lens effective focal length :-3≤f
f/ f≤-1.8.
In addition, back set of contact lenses combined focal length f
bF meets the following conditions with this camera lens effective focal length: 1≤f
b/ f≤2.6.
The back work distance of said camera lens meets the following conditions from d and camera lens effective focal length f: 1.8≤d/f≤3, and wherein d is BFL, BFL is the distance of the 5th lens element picture side side outermost point to imaging surface of said wide-angle safety monitoring camera lens.
Said aperture member 4 is between the 3rd lens element 3 and the 4th lens element 5, and aperture member 4 is near the 4th lens element 5 one sides.Said the 3rd lens abbe number Vd is less than 24, and said the 4th index of refraction in lens Nd is greater than 1.8.
Said the 3rd lens element 3 and the 4th lens element 5 satisfy following relation condition: 1≤t/f≤2 for thick lens and center of lens thickness t and lens focus f.
The focal power of said lens subassembly is a positive light coke, and the convex surface on this lens subassembly composition surface is side towards picture side; This lens construction f-number F#≤2.0, this lens construction field angle FOV>=120 °, first lens element 1 is the convex surface that is used for control system distortion size towards the r1 face of object plane.
Said first, second, third and fourth, the spectral transmittance of five, six lens elements is to visible light F, d, C and near infrared spectrum all have good permeability.Spectral transmittance is to visible light F, and d, C and near infrared spectrum carry out aberration correction, realizes that visible light and near infrared light wave band focus on same focal plane.Wherein F is that optical wavelength is the visible light of 486nm, and d is that optical wavelength is the visible light of 588nm, and C is that optical wavelength is the visible light of 685nm; And the optical wavelength of near infrared light is 830nm or 850nm or 870nm.
Fig. 2 to Fig. 9 should be in the optical performance curve figure of case study on implementation, wherein for the present invention:
Fig. 2 is that visible light section axial chromatic curve figure also can be the spherical aberration curve map, and by F, d, CF=0.486um commonly used, d=0.588um, the wavelength of C=0.656um three coloured light represent that unit is millimeter mm.
Fig. 3 is that infrared light section axial chromatic curve figure also can be the spherical aberration curve map, and by near-infrared light waves W1=0.83um commonly used, W2=0.85um, the wavelength of W3=0.87um three coloured light represent that unit is millimeter mm.
Fig. 4 is a visible light part chromatic longitudiinal aberration curve, is represented by the wavelength of F commonly used, d, C three coloured light, and unit is micron um.
Fig. 5 is an infrared light chromatic longitudiinal aberration curve, is represented by the wavelength of near infrared three coloured light commonly used, and unit is micron um.
Fig. 6 is visible light part astigmatism and distortion curve figure, representes that by the wavelength of F commonly used, d, C three coloured light unit is mm, and distortion curve figure representes the distortion sizes values under the different field angle situation, and unit is %.
Fig. 7 is infrared light part astigmatism and distortion curve figure, representes that by the wavelength of near infrared three coloured light commonly used unit is mm, and distortion curve figure representes the distortion sizes values under the different field angle situation, and unit is %.
Fig. 8 is a visible light part MTF curve map, has represented the picture level of comprehensively separating of an optical system.Can know that by figure this optical lens is with various aberration corrections to a level preferably.
Fig. 9 is an infrared light part MTF curve map, has represented the picture level of comprehensively separating of an optical system.Can know that by figure this optical lens is with various aberration corrections to a level preferably.
In case study on implementation of the present invention, the whole focal length value of this optical lens is EFL, and f-number is FNO, and field angle is FOV; Camera lens length overall TTL, and begin by the object space side, with each minute surface number consecutively; The minute surface of first lens element is r1, r2, and the minute surface of second lens element is r3, r4, and the minute surface of prismatic glasses element is r5, r6; The diaphragm face is r7, and the minute surface of the 4th lens element is r8, r9, and the minute surface of the 5th lens element is r10, r11; The minute surface of the 6th lens element is r11, r12, and the minute surface that passes through infrared fileter 8 is r13, r14, and is the spherical glass structure.
Preferred parameter value table one of the present invention:
EFL＝1.0mm，FNO＝2.06，FOV＝121°，TTL＝7.86mm
Claims (10)
- Day, night dual-purpose type high resolving power watching lens, it is characterized in that beginning to be provided with successively from a side towards thing:Have negative focal power and protruding first lens element (1) that is falcate towards object space;Second lens element (2) that is concave-concave or falcate with negative focal power;Has lenticular the 3rd lens element (3) of being of positive focal power;Be provided with aperture member (4) in the 3rd lens element (3) back;Has lenticular the 4th lens element (5) of being of positive focal power;Engage the lens subassembly of forming by the 5th lens element (6) and the 6th lens element (7) with positive light coke; The 5th lens element (6) that wherein has positive light coke is near the 4th lens element (5), and the 6th lens element (7) with negative power at the 5th lens element (6) at the back.
- 2. dual-purpose type high resolving power watching lens is characterized in that with the aperture member a kind of day, night according to claim 1 being that the boundary is divided into forward and backward two groups to camera lens, wherein before the set of contact lenses combined focal length use f fExpression, back set of contact lenses combined focal length is used f bExpression, then two groups of combined focal length ratios meet the following conditions :-2≤f f/ f b≤-0.6.
- 3. a kind of day, night according to claim 2 dual-purpose type high resolving power watching lens, set of contact lenses combined focal length f before it is characterized in that fF meets the following conditions with this camera lens effective focal length :-3≤f f/ f≤-1.8.
- 4. a kind of day, night according to claim 2, dual-purpose type high resolving power watching lens is characterized in that back set of contact lenses combined focal length f bF meets the following conditions with this camera lens effective focal length: 1≤f b/ f≤2.6.
- According to claim 2 or 3 or 4 described a kind of day, night dual-purpose type high resolving power watching lens; The back work distance that it is characterized in that said camera lens meets the following conditions from d and camera lens effective focal length f: 1.8≤d/f≤3; Wherein d is BFL, and BFL is the distance of the 5th lens element picture side side outermost point to imaging surface of said wide-angle safety monitoring camera lens.
- According to claim 2 or 3 or 4 described a kind of day, night dual-purpose type high resolving power watching lens; It is characterized in that said aperture member (4) is positioned between the 3rd lens element (3) and the 4th lens element (5), and aperture member (4) is near the 4th lens element (5) one sides.
- According to claim 2 or 3 or 4 described a kind of day, night dual-purpose type high resolving power watching lens, it is characterized in that said the 3rd lens abbe number Vd less than 24, said the 4th index of refraction in lens Nd is greater than 1.8.
- According to claim 2 or 3 or 4 described a kind of day, night dual-purpose type high resolving power watching lens, it is characterized in that said the 3rd lens element (3) and the 4th lens element (5) are that thick lens and center of lens thickness t and lens focus f satisfy following relation condition: 1≤t/f≤2.
- According to claim 2 or 3 or 4 described a kind of day, night dual-purpose type high resolving power watching lens, the focal power that it is characterized in that said lens subassembly is a positive light coke, the convex surface on this lens subassembly composition surface is side towards picture side; This lens construction f-number F#≤2.0, this lens construction field angle FOV>=120 °, first lens element (1) is the convex surface that is used for control system distortion size towards the r1 face of object plane.
- According to claim 2 or 3 or 4 described a kind of day, night dual-purpose type high resolving power watching lens; It is characterized in that said first, second, third and fourth, the spectral transmittance of five, six lens elements is to visible light F; D, C and near infrared spectrum all have good permeability; Spectral transmittance is to visible light F, and d, C and near infrared spectrum carry out aberration correction; Realize that visible light and near infrared light wave band focus on same focal plane; Wherein F is that optical wavelength is the visible light of 486nm, and d is that optical wavelength is the visible light of 588nm, and C is that optical wavelength is the visible light of 685nm; And the optical wavelength of near infrared light is 830nm or 850nm or 870nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203857390U CN202433590U (en) | 2011-10-12 | 2011-10-12 | High-resolution monitoring lens capable of using in the day and at night |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203857390U CN202433590U (en) | 2011-10-12 | 2011-10-12 | High-resolution monitoring lens capable of using in the day and at night |
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| Publication Number | Publication Date |
|---|---|
| CN202433590U true CN202433590U (en) | 2012-09-12 |
Family
ID=46783026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203857390U Expired - Lifetime CN202433590U (en) | 2011-10-12 | 2011-10-12 | High-resolution monitoring lens capable of using in the day and at night |
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| CN (1) | CN202433590U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323657A (en) * | 2011-10-12 | 2012-01-18 | 舜宇光学(中山)有限公司 | Monitoring lens |
| CN104330873A (en) * | 2014-11-29 | 2015-02-04 | 福建福光数码科技有限公司 | Day and night high-resolution fish-eye lens |
| CN105988215A (en) * | 2015-02-15 | 2016-10-05 | 宁波舜宇光电信息有限公司 | Multispectral module set imaging system, manufacturing method thereof and application of multispectral module set imaging system |
| CN106950679A (en) * | 2016-01-07 | 2017-07-14 | 富士胶片株式会社 | Imaging len and camera device |
| WO2019052200A1 (en) * | 2017-09-14 | 2019-03-21 | 浙江舜宇光学有限公司 | Optical imaging camera |
| CN110908094A (en) * | 2019-12-24 | 2020-03-24 | 协益电子（苏州）有限公司 | Miniaturized day-night dual-purpose wide-angle lens |
| WO2021184212A1 (en) * | 2020-03-17 | 2021-09-23 | 天津欧菲光电有限公司 | Optical lens, imaging module, electronic device, and driving device |
-
2011
- 2011-10-12 CN CN2011203857390U patent/CN202433590U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323657A (en) * | 2011-10-12 | 2012-01-18 | 舜宇光学(中山)有限公司 | Monitoring lens |
| CN104330873A (en) * | 2014-11-29 | 2015-02-04 | 福建福光数码科技有限公司 | Day and night high-resolution fish-eye lens |
| CN104330873B (en) * | 2014-11-29 | 2016-05-25 | 福建福光股份有限公司 | High resolution day and night fish eye lens |
| CN105988215A (en) * | 2015-02-15 | 2016-10-05 | 宁波舜宇光电信息有限公司 | Multispectral module set imaging system, manufacturing method thereof and application of multispectral module set imaging system |
| CN106950679A (en) * | 2016-01-07 | 2017-07-14 | 富士胶片株式会社 | Imaging len and camera device |
| CN106950679B (en) * | 2016-01-07 | 2020-10-16 | 天津欧菲光电有限公司 | Imaging lens and imaging device |
| WO2019052200A1 (en) * | 2017-09-14 | 2019-03-21 | 浙江舜宇光学有限公司 | Optical imaging camera |
| US11269159B2 (en) | 2017-09-14 | 2022-03-08 | Zhejiang Sunny Optical Co., Ltd. | Optical imaging lens assembly |
| CN110908094A (en) * | 2019-12-24 | 2020-03-24 | 协益电子（苏州）有限公司 | Miniaturized day-night dual-purpose wide-angle lens |
| CN110908094B (en) * | 2019-12-24 | 2023-11-24 | 协益电子（苏州）有限公司 | Miniaturized day night dual-purpose wide-angle lens |
| WO2021184212A1 (en) * | 2020-03-17 | 2021-09-23 | 天津欧菲光电有限公司 | Optical lens, imaging module, electronic device, and driving device |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120912 |
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| CX01 | Expiry of patent term |