CN109031625A - The high-definition monitoring camera lens of five megapixels of large aperture day and night - Google Patents
The high-definition monitoring camera lens of five megapixels of large aperture day and night Download PDFInfo
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- CN109031625A CN109031625A CN201811116064.2A CN201811116064A CN109031625A CN 109031625 A CN109031625 A CN 109031625A CN 201811116064 A CN201811116064 A CN 201811116064A CN 109031625 A CN109031625 A CN 109031625A
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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
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical 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
- G02B13/0055—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
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/0025—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical correction, e.g. distorsion, aberration
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Abstract
The invention discloses a kind of high-definition monitoring camera lenses of five megapixels of large aperture day and night, are disposed with the first lens, the second lens, the third lens, the 4th lens, the 5th lens, the 6th lens, the 7th lens, the 8th lens, the 9th lens in order from object side.The high-definition monitoring camera lens of five mega pixels of large aperture day and night of the invention is successively negative, is negative, positive, is negative, is negative, positive using focal power, just, positive and negative 9 groups totally 11 lensed configurations, 5th lens and the 7th lens are balsaming lens, pass through reasonable distribution focal power, it is not only compact-sized, and correct color difference and spherical aberration, and the curvature of field has further been corrected by the 8th lens and the 9th lens, greatly promote image quality, even if being still able to satisfy high definition demand at large aperture.
Description
Technical field
The present invention relates to optical image technology fields, and in particular to the high definition of five megapixels of large aperture day and night
Monitoring camera.
Background technique
Closed-circuit control TV (abbreviation CCTV) system is as a kind of security technology, in star hotel, office building, bank, political affairs
The places such as mansion organ increasingly play its important function, including present intelligent residential district also using CCTV system as security and
One important means of estate management.
With safety monitoring market in recent years it is rapid emerge, the optimization of Digital Signal Processing and network transfer speeds is promoted, to peace
The quality requirements of anti-monitoring camera greatly improve, from common monitoring demand to the identification of high definition.From day can only be monitored on daytime
Night will monitor.
In order to allow CCTV technology to play preferably effect, in each cctv surveillance engineering, the correct selection of camera lens
All be for economic indicator and technical performance it is highly important, need day and night continuous monitoring if it is fixed scene, then day and night two
The high-definition fixed-focus camera lens of five mega pixels is only selection.The reaction shot speed is fast, and image quality is stablized, high definition
Image quality provides details more abundant.However common fixed focus monitoring camera lens under visible light conditions on daytime primarily directed to designing
, the smaller confocal problem for not accounting for visible light and near infrared light of clear aperature, therefore only it is being equipped with human eye not at night
When visible infrared light, then dark images image blur, is unable to satisfy night monitoring requirement；When conventional camera lens generally calculates not
Consider near infrared band, the brightness of nighttime imaging, and then the bore of eyeglass are improved simply by the light passing amount for increasing camera lens
Larger, this will lead to the color difference of system, off-axis aberration is difficult to correct, and high-aperture lenses image quality is not good enough to be had become camera lens and set
One difficult point of meter, therefore, how to design it is a kind of can day and night and imaging clearly fixed focus monitoring camera lens it is very necessary.
Summary of the invention
The purpose of the present invention is to provide a kind of high-definition monitoring camera lens of five megapixels of large aperture day and night, solutions
Near infrared band is not considered when certainly conventional camera lens generally calculates, and improves nighttime imaging simply by the light passing amount for increasing camera lens
Brightness, and then the bore of eyeglass is also larger, and the color difference of system, off-axis aberration is easy to cause to be difficult to correct, large aperture mirror
The imperfect problem of head portrait matter.
In order to solve the above technical problems, the invention adopts the following technical scheme:
A kind of high-definition monitoring camera lens of five megapixels of large aperture day and night, from object side in order successively
It is provided with the first lens, the second lens, the third lens, the 4th lens, the 5th lens, the 6th lens, the 7th lens, the 8th thoroughly
Mirror, the 9th lens；
First lens are the meniscus spherical lenses with negative focal power；
Second lens are the meniscus spherical lenses with negative focal power；
The third lens are the meniscus spherical lenses with positive focal power；
4th lens are the concave-concave spherical lenses with negative focal power；
5th lens are that concave-concave spherical lens by one with negative focal power and one have positive focal power
Biconvex spherical lens composition the balsaming lens with negative focal power；
6th lens are the biconvex spherical lenses with positive focal power；
7th lens are that have positive light focus with the meniscus spherical lens of positive focal power and one by one
The balsaming lens with positive focal power of the biconvex spherical lens composition of degree；
8th lens are the biconvex spherical lenses with positive focal power；
9th lens are the concave-concave spherical lenses with negative focal power.
Preferably, aperture member is arranged on the 7th lens, it is close that the aperture member is located at the 7th lens
On the mirror surface of 6th lens.
Preferably, the 4th concave lens surface and the 5th concave lens surface are opposite and adjacent.
Preferably, first lens meet following condition: Nd≤1.55, Vd >=63, wherein Nd indicates first
The d optical index of lens material, Vd indicate the d light Abbe constant of the first lens material.
Preferably, the third lens meet following condition: 1.85 >=Nd >=1.7,30 >=Vd >=20, wherein Nd table
Show that the d optical index of the third lens material, Vd indicate the d light Abbe constant of the third lens material.
Preferably, the 4th lens meet following condition: Nd >=1.65, Vd≤35, wherein Nd indicates that the 4th is saturating
The d optical index of mirror material, Vd indicate the d light Abbe constant of the 4th lens material.
Preferably, the 6th lens meet following condition: Nd >=1.65, Vd≤50, wherein Nd indicates that the 6th is saturating
The d optical index of mirror material, Vd indicate the d light Abbe constant of the 6th lens material.
Preferably, between first lens and the second lens, between the second lens and the third lens, the 4th lens with
Between between 5th lens, between the 5th lens and the 6th lens, between the 6th lens and the 7th lens, the 7th lens and the 8th
Between lens, pass through spacer ring close-fitting between the 8th lens and the 9th lens.
Compared with prior art, the beneficial effects of the present invention are:
The high-definition monitoring camera lens of five mega pixels of large aperture day and night of the invention is successively negative using focal power,
9 groups negative, positive, negative, negative, positive, just, positive and negative totally 11 lensed configurations, the 5th lens and the 7th lens are balsaming lens, are led to
Reasonable distribution focal power is crossed, it is not only compact-sized, but also correct color difference and spherical aberration, and pass through the 8th lens and the
Nine lens have further corrected the curvature of field, therefore the lens construction greatly promotes image quality, even if still at large aperture
It is able to satisfy high definition demand.
For the present invention in optical design, spectral region is ensuring field angle in 486nm-900nm, clear aperature F#=1.4
Under conditions of, wave aberration is corrected so that system realize it is day and night confocal, i.e., in spectral region 486nm-900nm
It is confocal；Selecting specification simultaneously is the low-light (level) COMS of 6.5 μm of 2560 × 2160@, real under the floor light for not having to near-infrared lamp
The imaging image quality for five mega pixels day and night observed is showed.
Optical lens in the present invention all uses the glass of spherical surface, common material, few impurity, pursue monitoring range,
On the basis of imaging definition, high-resolution, reach more efficient technique and lower cost；Meanwhile even if in low-light (level)
Under environment or night environment, image can also be made to reach high-quality, i.e. five mega pixels；It can be widely applied to various places, be prison
Control the main product of imaging system.
Detailed description of the invention
Fig. 1 is lens distribution schematic diagram of the invention.
Fig. 2 is system point range figure of the invention.
Fig. 3 is MTF (modulation transfer function) curve graph of the invention.
Fig. 4 is astigmatism and distortion curve of the invention.
Fig. 5 is tolerance curve graph of the invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
For one embodiment of optical lens of the present invention, as shown in Figure 1, being used in the safety monitoring of outdoor medium and long distance
System.The camera lens is disposed in order from an object side: the first lens 1, the second lens 2, the third lens 3, the 4th lens 4,
5th lens 5, the 6th lens 6, the 7th lens 7, the 8th lens 8, the 9th lens 9, imaging surface IMA.And by object side, will be each
A mirror surface number consecutively, the mirror surface of the first eyeglass 1 are r1, r2, and the mirror surface of the second eyeglass 2 is r3, r4, the mirror surface of third eyeglass 3
For r5, r6, the mirror surface of the 4th eyeglass 4 is r7, r8, and the mirror surface of the 5th eyeglass 5 is r9, r10, r11, and the mirror surface of the 6th eyeglass 6 is
R12, r13, the mirror surface of the 7th eyeglass 7 are r14, r15, r16, and the mirror surface of the 8th eyeglass 8 is r17, r18, the mirror surface of the 9th eyeglass 9
For r19, r20.
First lens 1 are the meniscus spherical lenses with negative focal power；
Second lens 2 are the meniscus spherical lenses with negative focal power；
The third lens 3 are the meniscus spherical lenses with positive focal power；
4th lens 4 are the concave-concave spherical lenses with negative focal power；
5th lens 5 are the concave-concave spherical lens and a pair with positive focal power by one with negative focal power
The balsaming lens with negative focal power of protruding spherical lens composition；
6th lens 6 are the biconvex spherical lenses with positive focal power；
7th lens 7 are that have positive focal power with the meniscus spherical lens of positive focal power and one by one
The balsaming lens with positive focal power of biconvex spherical lens composition；
Diaphragm, the aperture member are arranged on the first face of the 7th lens, that is, the mirror surface r14 of the 7th lens is arranged in
On；
8th lens 8 are the biconvex spherical lenses with positive focal power；
9th lens 9 are the concave-concave spherical lenses with negative focal power.
The high-definition monitoring camera lens of five mega pixels of the large aperture day and night in the present embodiment is followed successively by using focal power
9 groups negative, negative, positive, negative, negative, positive, just, positive and negative totally 11 lensed configurations, the 5th lens and the 7th lens are balsaming lens,
It is not only compact-sized by reasonable distribution focal power, but also correct color difference and spherical aberration, and by the 8th lens and
9th lens have further corrected the curvature of field, therefore the lens construction greatly promotes image quality, though at large aperture according to
So it is able to satisfy high definition demand.
Optical lens in the present embodiment all uses the glass of spherical surface, common material, few impurity, monitors model pursuing
It encloses, on the basis of imaging definition, high-resolution, reaches more efficient technique and lower cost；Meanwhile even if in low-light (level)
Environment or night environment under, so that image is reached high-quality, i.e. five mega pixels.
Further, 4 concave surface r8 of the 4th lens and 5 concave surface r9 of the 5th lens are opposite and adjacent.Concave surface it is opposite and it is adjacent should
Kind optical texture form is mainly used to eliminate or reduce the coma (a kind of in aberration) in optical system.
Further, diaphragm, which is located at aperture member, is arranged on the first face of the 7th lens, is conducive to correct large aperture
Zonal aberration；8th lens 8 and the 9th lens 9 have certain thickness, for correcting the curvature of field.
It is as follows for the more preferable embodiment of the present embodiment:
First lens 1 meet following condition: Nd≤1.55, and Vd >=63, wherein Nd indicates 1 material of the first lens
D optical index, Vd indicate 1 material of the first lens d light Abbe constant.
The third lens 3 meet following condition: 1.85 >=Nd >=1.7, and 30 >=Vd >=20, wherein Nd indicates third
The d optical index of 3 material of lens, Vd indicate the d light Abbe constant of 3 material of the third lens.
4th lens 4 meet following condition: Nd >=1.65, and Vd≤35, wherein Nd indicates 4 material of the 4th lens
D optical index, Vd indicate 4 material of the 4th lens d light Abbe constant.
6th lens 6 meet following condition: Nd >=1.65, and Vd≤50, wherein Nd indicates 6 material of the 6th lens
D optical index, Vd indicate 6 material of the 6th lens d light Abbe constant.
First lens and the third lens are meniscus lens, have the function of compressing light correction color difference；4th lens are
Double concave type lens for increasing the angle of divergence of convergence light, while can also be used to reduce spherical aberration and color difference；6th lens are double
Convex type lens can significantly reduce spherical aberration, while can also improve coma and distortion.Such as the refractive index and Abbe of said lens
In constant no longer range, then optical system can be made to be unable to reach satisfied picture quality.
Between first lens and the second lens, between the second lens and the third lens, the 4th lens and the 5th lens
Between, between the 5th lens and the 6th lens, between the 6th lens and the 7th lens, between the 7th lens and the 8th lens,
Pass through spacer ring close-fitting between eight lens and the 9th lens.It can make to reach optical system when assembling camera lens by spacer ring close-fitting
System tolerance, so that assembly method is simple, while may also reach up the effect of design.
In the present embodiment, EFL (whole focal length value), the F# (f-number) of the optical lens, FOV (field angle), TTL
The preferred parameter value of (camera lens overall length), WL (wavelength band) is as follows:
EFL=36mm, F#=1.4, FOV=37 °, TTL=140mm, WL 486nm-900nm；
The value of corresponding each element is as follows:
| Mirror surface serial number | Radius of curvature | Center thickness | Refractive index Nd | Abbe constant Vd |
| r1 | 52.72 | 7 | Nd≤1.55 | Vd≥63 |
| r2 | 35.81 | 15 | ||
| r3 | 52.84 | 3 | Nd≤1.55 | Vd≥63 |
| r4 | 35.48 | 8.85 | ||
| r5 | 33.19 | 9.23 | 1.85≥Nd≥1.7 | 30≥Vd≥20 |
| r6 | 432.5 | 12.7 | ||
| r7 | -125.6 | 3 | Nd≥1.65 | Vd≤50 |
| r8 | 27.8 | 5.8 | ||
| r9 | -29.72 | 3 | 1.85≥Nd≥1.7 | 30≥Vd≥20 |
| r10 | 29.72 | 7.5 | Nd≥1.65 | Vd≤50 |
| r11 | -39.17 | 0.24 | ||
| r12 | 85.9 | 4.2 | Nd≥1.65 | Vd≤50 |
| r13 | -61.38 | 0.4 | ||
| r14 | 59.4 | 3 | 1.85≥Nd≥1.7 | 30≥Vd≥20 |
| r15 | 17.865 | 10 | Nd≥1.65 | Vd≤50 |
| r16 | -937 | 15.53 | ||
| r17 | 43.41 | 12 | 1.85≥Nd≥1.7 | 30≥Vd≥20 |
| r18 | -44.77 | 1.6 | ||
| r19 | -34.6 | 12 | Nd≤1.55 | Vd≥63 |
| r20 | 43.55 | 6.7 |
Fig. 2 to Fig. 5 is the optical correlation performance map of the present embodiment, and wherein Fig. 2 is the point range figure of system, and unit is micron (μ
m).Fig. 3 is MTF (modulation transfer function) curve graph, represents the comprehensive solution an of optical system as horizontal.Fig. 4 be astigmatism and
Distortion curve is indicated that unit is (mm) by the wavelength of common F, D, C three coloured light, and distortion curve indicates different visual fields
Distortion sizes values in the case of angle, unit %.Fig. 5 is tolerance curve graph, and the tolerance of an optical system determines that system fills
The complexity matched.As seen from the figure, which is corrected to a preferable level for various aberrations and tolerance.
Show that camera lens of the invention is 1 × 10 by experiment-2Under the illumination conditions of LUX, 200 meters of people can be told,
500 meters of vehicle.
" one embodiment ", " another embodiment ", " embodiment ", " preferred embodiment " spoken of in the present specification
Deng, refer to combine the embodiment description specific features, structure or feature include the application generality description at least
In one embodiment.It is not centainly to refer to the same embodiment that statement of the same race, which occur, in multiple places in the description.Further
For, when describing a specific features, structure or feature in conjunction with any embodiment, what is advocated is to combine other embodiments
To realize that this feature, structure or feature are also fallen within the scope of the present invention.
Although reference be made herein to invention has been described for multiple explanatory embodiments of the invention, however, it is to be understood that
Those skilled in the art can be designed that a lot of other modification and implementations, these modifications and implementations will fall in this Shen
It please be within disclosed scope and spirit.More specifically, disclose in the application, drawings and claims in the range of, can
With the building block and/or a variety of variations and modifications of layout progress to theme combination layout.In addition to building block and/or layout
Outside the modification and improvement of progress, to those skilled in the art, other purposes also be will be apparent.
Claims (8)
1. a kind of high-definition monitoring camera lens of five megapixels of large aperture day and night, it is characterised in that: from object side
Be disposed in order the first lens (1), the second lens (2), the third lens (3), the 4th lens (4), the 5th lens (5),
6th lens (6), the 7th lens (7), the 8th lens (8), the 9th lens (9)；
First lens (1) are the meniscus spherical lenses with negative focal power；
Second lens (2) are the meniscus spherical lenses with negative focal power；
The third lens (3) are the meniscus spherical lenses with positive focal power；
4th lens (4) are the concave-concave spherical lenses with negative focal power；
5th lens (5) are that concave-concave spherical lens by one with negative focal power and one have positive focal power
The balsaming lens with negative focal power of biconvex spherical lens composition；
6th lens (6) are the biconvex spherical lenses with positive focal power；
7th lens (7) are that have positive focal power with the meniscus spherical lens of positive focal power and one by one
Biconvex spherical lens composition the balsaming lens with positive focal power；
8th lens (8) are the biconvex spherical lenses with positive focal power；
9th lens (9) are the concave-concave spherical lenses with negative focal power.
2. the high-definition monitoring camera lens of five megapixels of large aperture day and night according to claim 1, feature exist
In: aperture member is set on the 7th lens (7), and the aperture member is located at the 7th lens (7) close to the 6th lens
(6) on mirror surface.
3. the high-definition monitoring camera lens of five megapixels of large aperture day and night according to claim 1, feature exist
In: the 4th lens (4) concave surface and the 5th lens (5) concave surface are opposite and adjacent.
4. the high-definition monitoring camera lens of five megapixels of large aperture day and night according to claim 1, feature exist
In: first lens (1) meet following condition: Nd≤1.55, and Vd >=63, wherein Nd indicates the first lens (1) material
D optical index, Vd indicate the first lens (1) material d light Abbe constant.
5. the high-definition monitoring camera lens of five megapixels of large aperture day and night according to claim 1, feature exist
In: the third lens (3) meet following condition: 1.85 >=Nd >=1.7, and 30 >=Vd >=20, wherein Nd indicates the third lens
(3) the d optical index of material, Vd indicate the d light Abbe constant of the third lens (3) material.
6. the high-definition monitoring camera lens of five megapixels of large aperture day and night according to claim 1, feature exist
In: the 4th lens (4) meet following condition: Nd >=1.65, and Vd≤35, wherein Nd indicates the d of the 4th lens (4) material
Optical index, Vd indicate the d light Abbe constant of the 4th lens (4) material.
7. the high-definition monitoring camera lens of five megapixels of large aperture day and night according to claim 1, feature exist
In: the 6th lens (6) meet following condition: Nd >=1.65, and Vd≤50, wherein Nd indicates the d of the 6th lens (6) material
Optical index, Vd indicate the d light Abbe constant of the 6th lens (6) material.
8. the high-definition monitoring camera lens of five megapixels of large aperture day and night according to claim 1, feature exist
In: between first lens (1) and the second lens (2), between the second lens (2) and the third lens (3), the 4th lens (4)
Between the 5th lens (5), between the 5th lens (5) and the 6th lens (6), between the 6th lens (6) and the 7th lens (7),
Between 7th lens (7) and the 8th lens (8), pass through spacer ring close-fitting between the 8th lens (8) and the 9th lens (9).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811116064.2A CN109031625B (en) | 2018-09-25 | 2018-09-25 | Large-aperture day and night dual-purpose five-million-pixel-level high-definition monitoring lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811116064.2A CN109031625B (en) | 2018-09-25 | 2018-09-25 | Large-aperture day and night dual-purpose five-million-pixel-level high-definition monitoring lens |
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| CN109031625A true CN109031625A (en) | 2018-12-18 |
| CN109031625B CN109031625B (en) | 2020-10-02 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02256011A (en) * | 1988-12-08 | 1990-10-16 | Nikon Corp | Zoom lens system |
| JPH07159689A (en) * | 1993-12-09 | 1995-06-23 | Olympus Optical Co Ltd | Optical system for amphibious camera |
| JP2011175161A (en) * | 2010-02-25 | 2011-09-08 | Tamron Co Ltd | Zoom lens |
| CN104238086A (en) * | 2013-06-17 | 2014-12-24 | 富士胶片株式会社 | Imaging lens and imaging apparatus |
-
2018
- 2018-09-25 CN CN201811116064.2A patent/CN109031625B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02256011A (en) * | 1988-12-08 | 1990-10-16 | Nikon Corp | Zoom lens system |
| JPH07159689A (en) * | 1993-12-09 | 1995-06-23 | Olympus Optical Co Ltd | Optical system for amphibious camera |
| JP2011175161A (en) * | 2010-02-25 | 2011-09-08 | Tamron Co Ltd | Zoom lens |
| CN104238086A (en) * | 2013-06-17 | 2014-12-24 | 富士胶片株式会社 | Imaging lens and imaging apparatus |
Non-Patent Citations (1)
| Title |
|---|
| 张继艳等: "宽光谱日夜两用鱼眼监控镜头的设计", 《激光与红外》 * |
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