CN207020387U - One kind focuses safety monitoring camera lens - Google Patents
One kind focuses safety monitoring camera lens Download PDFInfo
- Publication number
- CN207020387U CN207020387U CN201720514220.5U CN201720514220U CN207020387U CN 207020387 U CN207020387 U CN 207020387U CN 201720514220 U CN201720514220 U CN 201720514220U CN 207020387 U CN207020387 U CN 207020387U
- Authority
- CN
- China
- Prior art keywords
- lens
- monitoring camera
- concave
- aspherical
- utility
- 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.)
- Expired - Fee Related
Links
- 238000012544 monitoring process Methods 0.000 title claims abstract description 23
- 239000004568 cement Substances 0.000 claims abstract description 8
- 239000011521 glass Substances 0.000 claims description 8
- 230000003287 optical effect Effects 0.000 claims description 8
- 125000006850 spacer group Chemical group 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 5
- 239000004579 marble Substances 0.000 claims description 2
- 239000000571 coke Substances 0.000 abstract description 4
- 238000003384 imaging method Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 230000035945 sensitivity Effects 0.000 abstract 1
- 230000004075 alteration Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009738 saturating Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Landscapes
- Lenses (AREA)
Abstract
The utility model discloses one kind to focus safety monitoring camera lens, includes the 4th lens of the 3rd lens of the second lens of the first lens of the concave-concave negative power set gradually along light incident direction, biconvex positive light coke, biconvex positive light coke, concave-concave negative power；The camera lens just, just, minus 4 group of 4 slice structure, passes through reasonable distribution focal power so that the focal power of each eyeglass all in reasonable interval, at utmost reduces tolerance sensitivities using bearing；Simultaneously the processing of eyeglass and associated structural component is easier, reduces manufacturing cost；With F2.2 relative apertures, maximum 1/2.7 can be realized " imaging surface, clearly bright picture can be also realized under night low-light (level).Simultaneously, two pieces of plastic cement aspherical lens focal distance ratios are controlled within 2~0.5, and second index of refraction in lens Abbe number ratio between 0.01~0.1, determine that the utility model can bear 30 DEG C~70 DEG C of high and low temperature environment completely, i.e. under 30 DEG C~70 DEG C of high and low temperature environment, it is seen that, infrared not defocus.
Description
Technical field
A kind of security lens are the utility model is related to, safety monitoring camera lens is focused more specifically to one kind.
Background technology
With the fast development of science and technology, people there has also been higher level understanding to security protection, and monitoring camera is absurd fantastic immediately
It is raw.In recent years, monitoring camera has become a big main force of security protection industry, promotes security protection industry constantly to advance and rapid
Development.The species of camera lens becomes increasingly abundant also with the continuous vast of security protection market.Tight shot is except utilizing its high image quality, big
Many advantages, such as aperture, image quality are stable is gone on along in the forward position of safety monitoring camera lens.
While in order to meet camera lens high definition, it is seen that with infrared confocal, not defocus, and eliminate shooting under high/low temperature condition
The purple boundary effect of object edge, often eyeglass number is more and mostly all-glass construction for traditional tight shot, causes lens body
Product and weight are huge, and while wasting manpower and material resources, use is more inconvenient.
Utility model content
The purpose of this utility model is that providing one kind focuses safety monitoring camera lens, uses minimum glass modeling mixing eyeglass knot
Structure, solves the problems, such as the problem of infrared not confocal under the conditions of above tradition tight shot, especially purple boundary, high and low temperature environment.
One kind focuses safety monitoring camera lens, and the first lens are the glass sphere of concave-concave, and the second lens are the glass marble of biconvex
Face, the 3rd lens are aspherical for the plastic cement of biconvex, and the 4th lens are aspherical for the plastic cement of concave-concave, and diaphragm is located at the first lens and the
Between two lens.The focal lengths of four lens of the camera lens, refractive index and the radius of curvature of totally eight curved surfaces meets following bar respectively
Part：
Wherein, " f " is focal length, and " n " is refractive index, and " R " is radius of curvature, and "-" number represents that direction is negative, and subscript represents saturating
The sequence number of mirror.
One kind as described above focuses security lens, first lens and second lens by a spacer ring interval,
And the axial spacing of first lens and diaphragm is 4.95mm, the axially spaced-apart between diaphragm and second lens is
3.65mm；Second lens and the 3rd lens are by a spacer ring interval, and second lens and the 3rd lens
Optical axis at axial spacing be 0.523mm；3rd lens and the 4th lens are by a spacer ring interval, and described the
Three lens are 0.162mm with axial direction spacing at the optical axis of the 4th lens.
One kind as described above focuses safety monitoring camera lens, and small volume is in light weight.The lens of the utility model the 3rd and the 4th
Lens use plastic material.Conventional glass lens volume and weight is all bigger.Lens of the utility model the 3rd and the 4th saturating
Mirror uses plastic material, and plastic lens have the characteristics of volume and weight is small.
A kind of safety monitoring camera lens as described above, the 3rd lens and the 4th lens use aspheric design.Its is aspherical
Shape is satisfied by equation：
In above formula, parameter c is the curvature corresponding to radius, and y is radial coordinate (its unit is identical with length of lens unit),
K is circular cone whose conic coefficient.As k ＜ -1, face shape curve is hyperbola, is parabola during equal to k=-1, during -1 ＜ k ＜ 0
It is circle during k=0 for ellipse, is oblateness during k ＞ 0.α1To α8Represent the coefficient corresponding to each radial coordinate respectively, by with
Upper parameter can accurately set the face molded dimension of both-sided aspherical before and after lens.Its aspherical relevant parameter is listed in the table below：
The surface configuration of aspherical lens is more more complicated than sphere, and curve is bent always to the side of eyeglass from the center of eyeglass
Edge, while various aberrations are effectively reduced, the bore and thickness of further reducing glass.
A kind of visible, infrared confocal safety monitoring camera lens as described above, it is characterised in that in -30 DEG C~70 DEG C of height
Under warm environment, infrared not defocus.The positive and negative focal distance ratio -2 of the utility model plastic cement aspherical lens≤f3/f4≤ -0.5, the second lens
Refractive index Abbe number ratio is 0.01≤nd/vd≤ 0.1, determine that the utility model can bear -30 DEG C~70 DEG C of high/low temperature completely
Environment, i.e., under -30 DEG C~70 DEG C of high and low temperature environment, infrared not defocus.
Brief description of the drawings
Fig. 1 is the assembling figure for each lens that 4 chip of the present utility model focuses safety monitoring camera lens；
Fig. 2 is the optical system diagram that Fig. 14 chips focus each lens of safety monitoring camera lens；
Fig. 3 is defocusing curve figure of the present utility model；
Fig. 4 is MTF figure of the utility model under -30 DEG C of environment of low temperature；
Fig. 5 is MTF figure of the utility model under 20 DEG C of environment of normal temperature；
Fig. 6 is MTF figure of the utility model under 70 DEG C of environment of high temperature.
Embodiment
Further illustrate the technical solution of the utility model below in conjunction with the accompanying drawings and by embodiment.It can manage
Solution, specific embodiment described herein are used only for explaining the utility model, rather than to restriction of the present utility model.Separately
It is outer it should also be noted that, illustrate only the part related to the utility model for the ease of description, in accompanying drawing and not all interior
Hold.
One kind with reference to shown in figure 1 and Fig. 2 focuses safety monitoring camera lens, including pair set gradually along light incident direction
First lens L1 of recessed negative power, the second lens L2 of biconvex positive light coke, the 3rd lens L3, the concave-concave of biconvex positive light coke
4th lens L4 of negative power, the first lens and the second lens are by a spacer ring interval, and the axial direction of the first lens and diaphragm
Spacing is 4.95mm, and the axially spaced-apart between diaphragm and the second lens is 3.65mm；Second lens and the 3rd lens by one every
Circle interval, and the axial spacing at the optical axis of the second lens and the 3rd lens is 0.523mm；3rd lens pass through with the 4th lens
One spacer ring interval, and axial direction spacing is 0.162mm at the optical axis of the 3rd lens and the 4th lens.
In the present embodiment, the optical system being made up of above-mentioned lens set has reached following index：1. focal length f '=
4mm, 2. relative aperture F#=2.2,3. image planes size 1/2.7 ", 4. ω=106 ° of the angle of visual field 2,5. optics overall length 22mm, 6. empty
Optic back focal 5.8mm in gas.
In the present embodiment, -2≤f3/f4≤ -0.5 (the positive and negative focal distance ratio of plastic cement aspherical lens), 0.01≤nd/vd≤
0.1 (the second index of refraction in lens Abbe number ratio) determines that the utility model can bear -30 DEG C~70 DEG C of high and low temperature environment completely,
I.e. under -30 DEG C~70 DEG C of high and low temperature environment, infrared not defocus ensure that.As can be seen from Figure 3 without defocus, Fig. 4, Fig. 5 and figure
6, further prove under -30 DEG C~70 DEG C high and low temperature environments, system is visible with infrared confocal, no defocus phenomenon.
Wherein, portion identification can be found in following explanations in Fig. 3-6.
WAVELENGTH IN um --- wavelength, unit-um
FOCAL SHIFT IN um --- Jiao Yiliang, unit-um
CHROMATIC FOCAL SHIFT --- aberration is burnt to move curve
MAXIMUM FOCAL SHIFT RANGE --- maximum burnt shifting scope
DIFFRACTION LIMITED RANGE --- diffraction limit scope
MODULUS OF THE OTF --- modulation transfer function (MTF) value
SPATIAL FREQUENCY IN CYCLES PER MM --- every millimeter of demand pairs of spatial frequency
POLY CHROMATIC DIFFRACTION MTF --- polychromatic diffractive formula MTF
Preferred embodiment of the present utility model is these are only, it is all in the utility model not to limit the utility model
Spirit and principle within, any modification, equivalent substitution and improvements made etc., should be included in protection model of the present utility model
Within enclosing.
Claims (6)
1. one kind focuses safety monitoring camera lens, it is characterised in that the monitoring camera includes the first lens, the second lens, the 3rd
Lens and the 4th lens, wherein, first lens are the glass sphere of concave-concave, and second lens are the glass marble of biconvex
Face, the 3rd lens are aspherical for the plastic cement of biconvex, and the 4th lens are aspherical for the plastic cement of concave-concave, the diaphragm position of the monitoring camera
Between the first lens and the second lens, wherein, the focal distance ratio of the 3rd lens and the 4th lens is -2≤f3/f4≤-0.5。
2. monitoring camera according to claim 1, it is characterised in that second index of refraction in lens Abbe number ratio is 0.01
≤nd/vd≤0.1。
3. monitoring camera according to claim 1, it is characterised in that first lens pass through one with second lens
Spacer ring interval, and the axial spacing of first lens and diaphragm is 4.95mm, the axial direction between diaphragm and second lens
At intervals of 3.65mm；Second lens and the 3rd lens are by a spacer ring interval, and second lens and described the
Axial spacing at the optical axis of three lens is 0.523mm；3rd lens and the 4th lens by a spacer ring interval, and
3rd lens are 0.162mm with axial direction spacing at the optical axis of the 4th lens.
4. monitoring camera according to claim 1, it is characterised in that first lens, the second lens, the 3rd lens and
The focal lengths of 4th lens, refractive index and the radius of curvature of totally eight curved surfaces meets following condition respectively：
Wherein, " f " is focal length, and " n " is refractive index, and " R " is radius of curvature, and "-" number represents that direction is negative, and subscript represents lens
Sequence number.
5. monitoring camera according to claim 1, it is characterised in that the 3rd lens and the 4th lens use plastic cement material
Material.
6. monitoring camera according to claim 1, it is characterised in that the aspherical shape of the 3rd lens and the 4th lens
Shape is satisfied by equation：
In above formula, parameter c is the curvature corresponding to radius, and y is radial coordinate, and its unit is identical with length of lens unit, and k is circle
Whose conic coefficient is bored, face shape curve be hyperbola as k ＜ -1, is parabola during equal to k=-1, is ellipse during -1 ＜ k ＜ 0
Circle, it is circle during k=0, is oblateness, α during k ＞ 01To α8The coefficient corresponding to each radial coordinate is represented respectively, is joined more than
The face molded dimension of both-sided aspherical, its aspherical relevant parameter are listed in the table below before and after the accurate setting lens of number：
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720514220.5U CN207020387U (en) | 2017-05-10 | 2017-05-10 | One kind focuses safety monitoring camera lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720514220.5U CN207020387U (en) | 2017-05-10 | 2017-05-10 | One kind focuses safety monitoring camera lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207020387U true CN207020387U (en) | 2018-02-16 |
Family
ID=61476417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720514220.5U Expired - Fee Related CN207020387U (en) | 2017-05-10 | 2017-05-10 | One kind focuses safety monitoring camera lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207020387U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108983409A (en) * | 2018-09-11 | 2018-12-11 | 沈阳师范大学 | A kind of microspur eyepiece lens and the photographic device for carrying the microspur eyepiece lens |
| CN110333595A (en) * | 2019-06-24 | 2019-10-15 | 江西联益光学有限公司 | A kind of imaging lens system |
| CN112014944A (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 including the same |
| CN113253431A (en) * | 2021-06-25 | 2021-08-13 | 江西联创电子有限公司 | Infrared confocal lens and imaging device |
-
2017
- 2017-05-10 CN CN201720514220.5U patent/CN207020387U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108983409A (en) * | 2018-09-11 | 2018-12-11 | 沈阳师范大学 | A kind of microspur eyepiece lens and the photographic device for carrying the microspur eyepiece lens |
| CN108983409B (en) * | 2018-09-11 | 2020-09-25 | 沈阳师范大学 | Macro eyepiece lens and camera device carrying same |
| CN112014944A (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 including the same |
| CN112014944B (en) * | 2019-05-31 | 2022-04-12 | 宁波舜宇车载光学技术有限公司 | Optical lens and imaging apparatus including the same |
| CN110333595A (en) * | 2019-06-24 | 2019-10-15 | 江西联益光学有限公司 | A kind of imaging lens system |
| CN113253431A (en) * | 2021-06-25 | 2021-08-13 | 江西联创电子有限公司 | Infrared confocal lens and imaging device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105204140B (en) | A kind of tight shot | |
| CN207020387U (en) | One kind focuses safety monitoring camera lens | |
| CN205679846U (en) | A kind of safety monitoring camera lens | |
| CN105242376B (en) | A kind of imaging lens with temperature compensation function | |
| CN106772946A (en) | Small-sized glass modeling mixing is without thermalization tight shot | |
| TWI688788B (en) | Imaging lens and fabrication method thereof | |
| KR102084342B1 (en) | Eyepiece and Headwear Indicator | |
| CN206515544U (en) | Small-sized super large aperture tight shot | |
| CN109188657A (en) | A kind of black light wide-angle tight shot of super large light passing amount | |
| CN108592867A (en) | Optical signal receives optics microscope group | |
| CN108983396A (en) | A kind of fish eye lens | |
| CN209014799U (en) | A kind of black light wide-angle tight shot of super large light passing amount | |
| CN110174755B (en) | Zoom lens | |
| CN101221278B (en) | Zoom lens | |
| CN110286479B (en) | Zoom lens | |
| CN207380324U (en) | A kind of optical imaging lens and the panorama system comprising the camera lens | |
| CN207380325U (en) | A kind of long focus optical system | |
| CN106772939A (en) | Small-sized super large aperture tight shot | |
| CN108333728A (en) | A kind of high image quality ultra-wide angle mobile lens | |
| CN104459958B (en) | Prime lens used for infrared camera | |
| CN208366323U (en) | Optical signal receives optics microscope group | |
| CN208110148U (en) | A kind of large aperture ultra-wide angle imaging system | |
| CN208818912U (en) | A kind of fish eye lens | |
| CN112285877A (en) | Large-aperture lens | |
| CN206248906U (en) | A kind of unmanned plane camera lens |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20181112 Address after: 334000 197 Fenghuang West Road, Shangrao, Jiangxi Patentee after: Phenix Optical Co.,Ltd. Address before: 200333 Shanghai Putuo District Changshou Road 97 1701, 1702, 1703, 1704 room. Patentee before: Jiangxi Phoenix Optical Technology Co., Ltd. Shanghai branch |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180216 Termination date: 20210510 |