CN209167657U - A kind of undistorted glass modeling camera lens of fixed-focus - Google Patents
A kind of undistorted glass modeling camera lens of fixed-focus Download PDFInfo
- Publication number
- CN209167657U CN209167657U CN201821881110.3U CN201821881110U CN209167657U CN 209167657 U CN209167657 U CN 209167657U CN 201821881110 U CN201821881110 U CN 201821881110U CN 209167657 U CN209167657 U CN 209167657U
- Authority
- CN
- China
- Prior art keywords
- lens
- focal length
- undistorted
- fixed
- glass
- 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.)
- Active
Links
Landscapes
- Lenses (AREA)
Abstract
The utility model relates to optical image technology fields more particularly to a kind of undistorted glass of fixed-focus to mould camera lens.The camera lens includes the third lens of the first lens of the negative focal length set gradually along object side to image side, the second lens of negative focal length, positive focal length, 4th lens of positive focal length, the 5th lens of negative focal length, positive focal length the 6th lens, first, second lens towards image side be on one side concave surface, the third lens are biconvex lens, 4th lens are biconvex lens, 5th lens are that meniscus lens is convex surface towards image side on one side, and the 6th lens are biconvex lens.The utility model is undistorted, and this patent field angle reaches 100 degree, and TV distorts less than 1%；It is at low cost, number of lenses is reduced using plastic aspherical element and reduces unit price；Environment resistant temperature change capabilities are strong, and glass lens technique for temperature compensation is used in design, and temperature camera lens in -30 DEG C to+70 DEG C variations does not need to re-focuse it is ensured that imaging clearly.
Description
Technical field
The utility model relates to optical image technology fields more particularly to a kind of undistorted glass of fixed-focus to mould camera lens.
Background technique
In recent years for monitoring purposes, unmanned plane field or vehicle-mounted purposes camera system to wide-angle, high-resolution, small
Distort trend development, and at present although the wide-angle lens of main product can satisfy requirement high-definition, but anamorphose is tight
Weight, surrounding pictures information content is poor, needs the later period to make further image procossing, or complicated more lens combinations is needed to correct system
System distortion is unsatisfactory for monitoring or automotive field miniaturization, lightweight requirements.The invention proposes a kind of new optical system, knots
Structure is compact, and while meeting client's wide-angle, real scene shooting picture is not deformed, and meets in monitoring or automotive field environment temperature
Variation requires.
Existing patent: a kind of small aberration optical lens of large aperture, application number: 201711386462.1 applyings date:
2017.12.20, including being arranged successively the front lens group, aperture member, rear lens group of setting from object space to imaging side and filtering
Piece.Front lens group includes the first lens, the second lens, the third lens and the 4th lens, and rear lens group includes the 5th lens, the 6th
Lens and the 7th lens.First lens, the third lens and the 7th lens are non-spherical lens, the 5th lens and the 6th lens group
Synthesize the balsaming lens with positive light coke.The above-mentioned small aberration optical lens of large aperture pass through setting the first lens, the third lens
It is non-spherical lens with the 7th lens, the volume of camera lens can be efficiently reduced, to keep the structure of camera lens more compact, has
Camera lens is small in size, optical distortion is small, imaging picture is substantially without deformation, the advantage that imaging image quality is high and imaging picture color is accurate.
The shortcomings that prior art:
1, field angle is less than normal, can coverage it is smaller；
2, at high cost, number of lenses is more, is cut to glass and Glass aspheric eyeglass, and unit price is expensive；
3, assembling consistency is poor, and the more dimensional discrepancys of glass lens manufacturing procedure are big, and consistency is poor, are unfavorable for producing in batches；
4, environmental suitability is poor, can become empty there is a phenomenon where focal shift image under extreme environment.
Utility model content
In order to solve the above-mentioned technical problem, the utility model provides a kind of undistorted glass modeling camera lens of fixed-focus.
The technical solution that the utility model is taken to achieve the above object are as follows:
A kind of fixed-focus is undistorted glass moulds camera lens, the camera lens include the first saturating of the negative focal length set gradually along object side to image side
The third lens of mirror, the second lens of negative focal length, positive focal length, the 5th lens, the positive focal length of the 4th lens of positive focal length, negative focal length
The 6th lens, the first, second lens are concave surface towards image side on one side, and the third lens are biconvex lens, and the 4th lens are biconvex
Lens, the 5th lens are that meniscus lens is convex surface towards image side on one side, and the 6th lens are biconvex lens.
As a further improvement, wherein the second lens and the 6th lens are plastic aspheric lens.
As a further improvement, the focal length of second lens is f2, the focal length of the 6th lens is f6, is met
Relational expression: -1.25 < f2/f6 < -0.70.
As a further improvement, the focal length of the 4th lens is f4, the focal length of the 5th lens is f5, meets relationship
Formula: -1.05 < f4/f5 < -0.68
As a further improvement, also including an aperture device, the aperture device is located at the third lens and the 4th lens
Between.
As a further improvement, the 4th lens and the 5th lens are one group of balsaming lens.
As a further improvement, the material folding color rate of second lens is ND2, material dispersion coefficient VD2, the 6th thoroughly
The material folding color rate of mirror is ND6, material dispersion coefficient VD6, meets relational expression: 0.016 < (ND2/VD2)=(ND6/VD6)
<0.035。
As a further improvement, the material folding color rate of the 4th lens is ND4, material dispersion coefficient VD4, meet
Relational expression: 0.019 < ND4/VD4 < 0.026.
The utility model has the beneficial effects that
1. the utility model is undistorted, this patent field angle reaches 100 degree, and TV distorts less than 1%；
2. it is at low cost, number of lenses is reduced using plastic aspherical element and reduces unit price；
3. environment resistant temperature change capabilities are strong, glass lens technique for temperature compensation is used in design, temperature is arrived at -30 DEG C
Camera lens does not need to re-focuse it is ensured that imaging clearly when+70 DEG C of variations.
Detailed description of the invention
Fig. 1 is the lens schematic diagram of the utility model embodiment；
Fig. 2 is first analysis diagram of the utility model embodiment；
Fig. 3 is second analysis diagram of the utility model embodiment；
Fig. 4 is that the Spot of the utility model embodiment schemes；
Fig. 5 is the curvature of field figure of the utility model embodiment；
Fig. 6 is the distortion figure of the utility model embodiment；
Analysis diagram when Fig. 7 is the utility model embodiment low temperature 40 degrees below zero；
Fig. 8 is analysis diagram when the utility model embodiment high temperature is 85 degree above freezing.
Specific embodiment
Specific embodiment of the present utility model is made a detailed explanation with reference to the accompanying drawing.
As shown in Figure 1, a kind of undistorted glass of fixed-focus moulds camera lens, which includes the negative coke set gradually along object side to image side
Away from the first lens E1, the second lens E2 of negative focal length, positive focal length the third lens E3, the 4th lens E4 of positive focal length, negative coke
Away from the 5th lens E5, positive focal length the 6th lens E6, the first, second lens E1, E2 is concave surface towards image side on one side, and third is saturating
Mirror E3 is biconvex lens, and the 4th lens E4 is biconvex lens, and the 5th lens E5 is that meniscus lens is convex surface towards image side on one side, the
Six lens E6 are biconvex lens.
Wherein the second lens E2 and the 6th lens E6 is plastic aspheric lens.
The focal length of the second lens E2 is f2, and the focal length of the 6th lens E6 is f6, meets relational expression :-
1.25<f2/f6<-0.7。
The focal length of 4th lens E4 is f4, and the focal length of the 5th lens E5 is f5, meets relational expression: -1.05 < f4/
f5<-0.68。
It include also an aperture device ST, the aperture device is between the third lens E3 and the 4th lens E4.
The 4th lens E4 and the 5th lens E5 is one group of balsaming lens.
The material folding color rate of the second lens E2 is ND2, and the material of material dispersion coefficient VD2, the 6th lens E6 are rolled over
Color rate is ND6, material dispersion coefficient VD6, meets relational expression: 0.016 < (ND2/VD2)=(ND6/VD6) < 0.035.
The material folding color rate of the 4th lens E4 is ND4, material dispersion coefficient VD4, meets relational expression: 0.019 <
ND4/VD4<0.026。
In the present embodiment, when operating distance is infinity, panorama fish-eye total focal length f=3.2mm, FNO=
2.2, FOV=100 ° of field angle, camera lens TV distortion=0.5%, the parameters of lens group are successively listed in Table 1 below:
Table 1
It can be obtained by table 1
F2/f6=-6.567673/7.721218=-0.8506
F4/f5=4.094863/-5.032167=-0.8137
ND2/VD2=1.535081/55.779665=0.028
ND6/VD6=1.535081/55.779665=0.028
ND4/VD4=1.592824/68.624378=0.023
It is all satisfied requirement
In addition, the surface S3 and S4 of the second lens E2, the surface S10 and S11 of the 6th lens group E6 are non-in the present embodiment
Spherical surface, aspherical correlation values are successively listed in table 2:
In the present embodiment above table, n is refractive index, and R is radius of curvature, and the first lens E6 of lens E1~the 6th is successively
Focal length be f1~f6, panorama fish eye lens provided by embodiment be to provide a kind of undistorted, high-resolution, large aperture,
The strong and inexpensive camera lens of environment resistant temperature change capabilities, to overcome shortcoming in the prior art.
As shown in Figures 2 and 3, wherein MTF (Modulation Transfer when Fig. 2 Fig. 3 is 20 degrees Celsius of embodiment
Function, modulation transfer function) value figure, the mtf value figure is based on parameter in table 1, the product such as resolution ratio that optical lens is most valued
The measurement of matter defines mtf value and is necessarily greater than 0, and less than 1, in the art mtf value closer to 1, illustrates that the performance of camera lens is got over
It is excellent, i.e. high resolution；Its variable is spatial frequency, and spatial frequency is i.e. can show more fewer striplines in the range of a mm
Measurement, unit are indicated with lp/mm；Fixed high frequency (such as 300lp/mm) curve represents resolution of lens characteristic, this curve
Higher, resolution of lens is higher, and ordinate is mtf value.Abscissa can set image field center to the distance of measurement point, camera lens be with
Symmetrical structure centered on optical axis, center to the pixel qualitative change law of all directions be it is identical, due to factors such as aberrations
It influences, certain point is remoter at a distance from image field center in image field, and mtf value is generally in downward trend.Therefore it is arrived with image field center
The distance at image field edge is abscissa, can reflect the imaging quality of lens edge.In addition, in the position for deviateing image field center,
The mtf value as measured by sinusoidal grating of the lines with lines radially along a tangential direction is different.It will be parallel to
The MTF curve that the lines of diameter generate is known as sagitta of arc curve, is designated as S (Sagittal), and the lines for being parallel to tangent line are generated
MTF curve be known as meridian curve, be designated as T (Meridional).In this way, which MTF curve generally has two, i.e. S curve and T
Curve, in Fig. 2, Fig. 3, MTF change curve when having multiple groups using the distance of image field center to image field edge as abscissa reflects this
Lens system has compared with high resolution, and up to ten million pixel, the more current mainstream optical system of optical property, which has, greatly to be promoted.
Fig. 4 is the corresponding point range figure of optical lens, and mass center radius and geometric radius are as shown in Figure 4, it can be achieved that good
Image quality.
The corresponding curvature of field figure of lens system visible light part is made of five curve T and five curve S；Wherein, five songs
Line T respectively indicates the corresponding meridional beam (Tangential of five kinds of wavelength (470nm, 510nm, 555nm, 610nm and 650nm)
Rays aberration), five curve S respectively indicate the corresponding arc of three kinds of wavelength (470nm, 510nm, 555nm, 610nm and 650nm)
Swear the aberration of light beam (Sagittial Rays), meridianal curvature of field value and Sagittal field curvature value are smaller, illustrate that image quality is better.Such as figure
Shown in 5, meridianal curvature of field value control within the scope of -0.02~0.05mm, Sagittal field curvature value control -0.02~0.05mm range with
It is interior.
The corresponding distortion figure of lens system visible light part, for curve closer to y-axis, aberration rate is smaller in figure.Such as Fig. 6 institute
Show, wherein the control of optical distortion rate is within 0%~2% range.
Undistorted camera lens is widely used in indoor and outdoor, and daily 24 hours 365 days 1 year in running order, locating for camera lens
Variation of ambient temperature it is huge.The typical operating temperature requirements of camera lens are -30 DEG C~80 DEG C, and camera lens must assure that be reached in this temperature difference
It is still clear with 20 DEG C (room temperature) to be imaged in the range of to more than 110 degrees Celsius, without re-focusing.By
It can be affected by temperature and change in the refractive index of eyeglass material, lens dimension, lens barrel material, microscope base material can be with temperature
Variation and expand with heat and contract with cold, these factors are burnt after causing common monitoring camera to will appear different imagings under high and low temperature environment
(rear cut-off distance), the referred to as temperature drift of lens imaging.Fig. 7 and Fig. 8 is referred to together, finds out that operating temperature is at -40 DEG C by Fig. 7 Fig. 8
~85 DEG C, the present embodiment camera lens still ensure that be imaged without re-focusing it is still clear with 20 DEG C (room temperature)
It is clear.
Claims (8)
1. a kind of undistorted glass of fixed-focus moulds camera lens, it is characterised in that: the camera lens includes the negative coke set gradually along object side to image side
Away from the first lens (E1), the second lens (E2) of negative focal length, positive focal length the third lens (E3), the 4th lens of positive focal length
(E4), the 6th lens (E6) of the 5th lens (E5) of negative focal length, positive focal length, the first, second lens (E1, E2) are towards image side one
Face is concave surface, and the third lens (E3) are biconvex lens, and the 4th lens (E4) are biconvex lens, and the 5th lens (E5) are meniscus lens
It is on one side convex surface towards image side, the 6th lens (E6) are biconvex lens.
2. a kind of fixed-focus according to claim 1 is undistorted, glass moulds camera lens, it is characterised in that: wherein the second lens (E2) and
6th lens (E6) are plastic aspheric lens.
3. the undistorted glass of a kind of fixed-focus according to claim 1 moulds camera lens, it is characterised in that: second lens (E2)
Focal length be f2, the focal lengths of the 6th lens (E6) is f6, meets relational expression: -1.25 < f2/f6 < -0.70.
4. the undistorted glass of a kind of fixed-focus according to claim 1 moulds camera lens, it is characterised in that: the focal length of the 4th lens (E4)
Focal length for f4, the 5th lens (E5) is f5, meets relational expression: -1.05 < f4/f5 < -0.68.
5. the undistorted glass of a kind of fixed-focus according to claim 1 moulds camera lens, it is characterised in that: also include an aperture device
(ST), the aperture device is located between the third lens (E3) and the 4th lens (E4).
6. a kind of fixed-focus according to claim 1 is undistorted, glass moulds camera lens, it is characterised in that: the 4th lens (E4) and
5th lens (E5) are one group of balsaming lens.
7. the undistorted glass of a kind of fixed-focus according to claim 1 moulds camera lens, it is characterised in that: second lens (E2)
It is ND2 that material, which rolls over color rate, and the material folding color rate of material dispersion coefficient VD2, the 6th lens (E6) are ND6, material dispersion coefficient
For VD6, meet relational expression: 0.016 < (ND2/VD2)=(ND6/VD6) < 0.035.
8. the undistorted glass of a kind of fixed-focus according to claim 1 moulds camera lens, it is characterised in that: the 4th lens (E4)
It is ND4 that material, which rolls over color rate, and material dispersion coefficient VD4 meets relational expression: 0.019 < ND4/VD4 < 0.026.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821881110.3U CN209167657U (en) | 2018-11-15 | 2018-11-15 | A kind of undistorted glass modeling camera lens of fixed-focus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821881110.3U CN209167657U (en) | 2018-11-15 | 2018-11-15 | A kind of undistorted glass modeling camera lens of fixed-focus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209167657U true CN209167657U (en) | 2019-07-26 |
Family
ID=67338240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821881110.3U Active CN209167657U (en) | 2018-11-15 | 2018-11-15 | A kind of undistorted glass modeling camera lens of fixed-focus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209167657U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109324395A (en) * | 2018-11-15 | 2019-02-12 | 江西特莱斯光学有限公司 | A kind of undistorted glass modeling camera lens of fixed-focus |
| CN110412733A (en) * | 2019-06-29 | 2019-11-05 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
-
2018
- 2018-11-15 CN CN201821881110.3U patent/CN209167657U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109324395A (en) * | 2018-11-15 | 2019-02-12 | 江西特莱斯光学有限公司 | A kind of undistorted glass modeling camera lens of fixed-focus |
| CN110412733A (en) * | 2019-06-29 | 2019-11-05 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
| CN110412733B (en) * | 2019-06-29 | 2021-09-17 | 瑞声光学解决方案私人有限公司 | Image pickup optical lens |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104718484B (en) | Eyepiece optical system, Optical devices, and the method for manufacture eyepiece optical system | |
| CN107632369B (en) | Fixed-focus lens and camera equipment | |
| CN100576010C (en) | Zoom lens, image pick-up device and personal digital assistant | |
| CN110646919B (en) | Fisheye lens | |
| CN108318995B (en) | Lens system and lens | |
| CN110133828A (en) | Tight shot | |
| CN109324395A (en) | A kind of undistorted glass modeling camera lens of fixed-focus | |
| CN108663783B (en) | Large-aperture low-cost panoramic fisheye lens | |
| WO2021027287A1 (en) | Large-aperture lens and terminal device | |
| CN111323895A (en) | Lens and manufacturing method thereof | |
| CN209167650U (en) | A kind of ultra high-definition telephoto lens | |
| CN209167657U (en) | A kind of undistorted glass modeling camera lens of fixed-focus | |
| CN115933117A (en) | Day and night confocal lens and imaging device | |
| CN111103672B (en) | Optical lens | |
| CN208737082U (en) | A kind of large aperture low cost panorama fish eye lens | |
| CN209417405U (en) | A kind of undistorted camera lens of large aperture near-infrared | |
| CN209167653U (en) | A kind of ultra-thin fish eye lens | |
| CN115248496B (en) | High-definition optical lens and high-performance laser radar | |
| CN116880040A (en) | Infrared confocal optical lens and imaging device | |
| CN109116525B (en) | Athermal fisheye high-definition optical lens | |
| CN109633861A (en) | A kind of large aperture telephoto lens | |
| CN108363190B (en) | Lens system and lens | |
| CN110333591A (en) | A kind of 0.95mm vehicle-mounted high-definition looks around optical system and its imaging method | |
| CN109613686A (en) | A kind of ultra-thin wide-angle lens of no thermalization | |
| CN209417401U (en) | A kind of large aperture telephoto lens |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |