CN206057670U - A kind of non-brake method double-view field imaging lens - Google Patents
A kind of non-brake method double-view field imaging lens Download PDFInfo
- Publication number
- CN206057670U CN206057670U CN201621022077.XU CN201621022077U CN206057670U CN 206057670 U CN206057670 U CN 206057670U CN 201621022077 U CN201621022077 U CN 201621022077U CN 206057670 U CN206057670 U CN 206057670U
- Authority
- CN
- China
- Prior art keywords
- lens
- group
- focal length
- view field
- field imaging
- 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 discloses a kind of non-brake method double-view field imaging lens, focal length reaches more than 250mm, realizes that visual field switches using switching lens set mode.Camera lens includes four groups of lens, respectively front fixed group, switching zoom group, rear fixed group and focusing group altogether.Before described, fixed group is maintained static.The switching zoom group cuts out the zoom for realizing camera lens, and when switching zoom group is cut, camera lens is in short focus state, and when switching zoom group cuts out, camera lens is in focal length state.After described, fixed group is maintained static.The focusing group moves axially to realize the focusing to far and near target along optical axis.This utility model only just realizes suitching type double-view field zoom with five germanium material lens, and simultaneity factor image quality is good, and visual field switching time is short.
Description
Technical field
This utility model is related to a kind of uncooled IRFPAs camera lens, more particularly to a kind of focal length suitching type double-view field thermal imaging
Camera lens.
Background technology
Uncooled IRFPAs video camera is affected less due to cheap cost and by weather, its penetrate haze ability compared with
By force, widely use in each field such as the army and the people.As operating distance requires to be continuously increased, telephoto lens is also by each field
Pay attention to, become uncooled IRFPAs development trend.However, tight shot is single due to visual field, it is impossible to take into account target on a large scale and search
Rope and focal length object observing details, range of application is restricted, while having highlighted the important function of double-view field camera lens.
Non-brake method double-view field imaging lens disclosed in prior art generally axially mobile lens come realize visual field switch,
And focal length end focal length is general shorter.The change light bar infrared double-view-field optical lens of Patent No. 201210339814.9 are practical new
In type patent, along optical axis movement, the lens set of two eyeglasses composition realizes that visual field switches, and longest focal length is 180mm.Patent No.
201420073363.3 a kind of small size non-brake method dual field-of-view infrared optical system utility model patent in, using single eyeglass edge
Optical axis movement realizes that visual field switches, and longest focal length is 120mm.Relative to eyeglass suitching type double-view field camera lens, move mode on axle
Visual field switching time is long, and axle upward stability is poor, easily causes optical axis deviation and target is lost.
Utility model content
For above-mentioned deficiency, this utility model provides a kind of suitching type non-brake method double-view field imaging lens, the camera lens
With technological merits such as visual field switching time short, focal length length.All eyeglasses adopt germanium material, camera lens to use a high order aspheric
Face surface and a binary diffraction surface, realize visual field switching by switching the incision of zoom group and cutting out, reduce visual field and cut
Change the time, it is ensured that the real-time of target following.
This utility model is achieved by the following technical solution：A kind of non-brake method double-view field imaging lens, thermal imaging
Camera lens is made up of five lens, is followed successively by the first lens, the second lens, the 3rd lens, the 4th lens and from the object side to image side
Five lens；Five lens fixed group before being divided into according to function, switches zoom group, fixes group and focusing group afterwards；Front fixed group is the
One lens, switching zoom group are made up of the second lens and the 3rd lens, and fixed group is the 4th lens afterwards, and focusing group is the 5th saturating
Mirror.
Five lens are all germanium material lens.
First lens are meniscus lens, and lens centre is fixed on the straight line of optical axis place and immovable；
Second lens are biconcave lenss, and the 3rd lens are biconvex lens, switch zoom group and cut perpendicular to optical axis
Go out to realize visual field handoff functionality；
4th lens are diverging meniscus lenses, and lens centre is fixed on the straight line of optical axis place and immovable；
5th lens are biconvex lens, are realized to far and near target focusing function along optical axis movement.
The first described lens are positive meniscus lens of a piece of convex surface to thing side；The second described lens are that concave-concave is negative saturating
Mirror, the 3rd lens are biconvex positive lens；The 4th described lens are negative meniscus lens of a piece of convex surface to thing side；Described
Five lens are biconvex positive lens.
The diameter of first lens meets following condition with longest focal length：
1.0<D1/ft<1.2,
ft>250mm,
Wherein, D1Represent the diameter of the first lens, ftRepresent that the non-brake method double-view field imaging lens are in focal length state
When focal length.
The front fixed group, switching zoom group meet following condition with the focal length of rear fixed group：
f1/ft>1.4,
0<f2/ft<0.4,
-1.2<f3/ft<- 0.8,
Wherein, f1The focal length of fixed group, f before representing2Represent the focal length of switching zoom group, f3The focal length of fixed group after expression,
ftRepresent the non-brake method double-view field imaging lens be in focal length state when focal length.
It is short focus state when the Shot change zoom group is cut, is focal length state when cutting out.
The switching zoom group with latter fixed group at least respectively select surface to be aspheric surface, while at least in one
Binary diffraction face is processed on individual non-spherical surface.
Aperture diaphragm is set towards thing side surface at latter fixed group.
Coating hard carbon films of first lens towards thing side.
This utility model compared with prior art, has the advantage that and beneficial effect：This utility model is by upper first
The selection and arrangement of lens, the second lens, the 3rd lens, the 4th lens and the 5th lens, realizes focal length uncooled IRFPAs
Visual field switching, shorten two visual field switching times, it is ensured that the real-time of target following.Focal length end focal length reaches simultaneously
More than 250mm so that uncooled IRFPAs video camera operating distance is farther, further expanded the effect of double-view field camera lens away from
From.Camera lens of the present utility model all using germanium material lens, is not used relatively costly material, it is ensured that the economy of system
Property.
Description of the drawings
Fig. 1 is camera lens sectional view of the present utility model；
Fig. 2 be this utility model focal length be in short focus when modulation transfer function (MTF) figure；
Fig. 3 be this utility model focal length be in focal length when modulation transfer function (MTF) figure.
In figure, group before 1-, is fixed, 2- switching zoom groups fix group after 3-, 4- focusing groups, 5- optical axises, the first lens of 11-,
The second lens of 21-, the 3rd lens of 22-, the 4th lens of 31-, the 5th lens of 41-, the 3rd lens front surfaces of S5-, the 4th lens of S7-
Front surface.
Specific embodiment
Clearly to illustrate the technical characterstic of this programme, below by specific embodiment, this programme is illustrated.
Embodiment 1
As shown in Figure of description Fig. 1, this utility model provides a kind of non-brake method double-view field imaging lens, from thing side
It is followed successively by successively comprising four groups of lens to image side, respectively front fixed group 1, switching zoom group 2 fix group 3, focusing group 4 afterwards.
Front fixed group is the first lens 11 comprising a piece of positive meniscus lens convex surface facing thing side, in positive meniscus lens lens
The heart is fixed on 5 place straight line of optical axis and immovable.Used due to often exposed in atmosphere, to prevent the first lens
11 are subject to dust, rainwater and artificial scraping, 11 front surface coating hard carbon films of the first lens.
Switching zoom group 2 is successively comprising a piece of biconcave lenss i.e. the second lens 21 and a piece of biconvex lens i.e. the 3rd lens
22.Camera lens carries out visual field switching with cutting out by switching the incision of zoom group 2.When switching zoom group 2 and cutting, camera lens is in short
Coke-like state, when switching zoom group 2 cuts out, camera lens is in focal length state.Quickly cutting for two visual fields can be realized by this kind of structure
Change, ensure the real-time for tracking.
Fixed group 3 includes a piece of diverging meniscus lenses convex surface facing thing side i.e. the 4th lens 31 afterwards, and diverging meniscus lenses 31 are saturating
Mirror center is fixed on 5 place straight line of optical axis and immovable.
Focusing group 4 is the 5th lens 41 comprising a piece of biconvex lens.4 lens of focusing group can carry out axial shifting along optical axis 5
It is dynamic, it is possible to achieve focusing of the camera lens to far and near target.The movement of 4 lens of focusing group can use motor control, with low in energy consumption, knot
The advantages of structure is compact.
In the present embodiment, the diaphragm of suitching type non-brake method double-view field imaging lens is arranged on the 4th lens 31 towards thing side
Surface is with filtering interfering veiling glare.
In the present embodiment, all lens are germanium material using material, only using five eyeglasses, except the first lens 11 are leaned on
The nearly thing side surface equal coating infrared anti-reflection film of outer remaining surface so that the low processing cost of camera lens, lens transmission efficiency are higher.
In the present embodiment, the diameter of the first lens of double-view field camera lens 11 meets following condition with longest focal length：
1.0<D1/ft<1.2,
ft>250mm
Wherein, D1Represent the diameter of the first lens 11, ftRepresent that the non-brake method double-view field imaging lens are in long coke-like
Focal length during state.
Front fixed group 2, switching zoom group 2 meet following condition with the focal length of rear fixed group 3：
f1/ft>1.4,
0<f2/ft<0.4,
-1.2<f3/ft<- 0.8,
Wherein, f1The focal length of fixed group 1, f before representing2Represent the focal length of switching zoom group 2, f3Jiao of fixed group 3 after expression
Away from ftRepresent the non-brake method double-view field imaging lens be in focal length state when focal length.
In the present embodiment, the 3rd lens front surface S5 and the 4th lens front surface S7 select aspheric surface.Simultaneously the
Binary diffraction face is superimposed on four lens front surface S7.Non-spherical lens has the advantages that to improve the aberrations such as spherical aberration, enables to regard
Open country becomes much larger and true.After using non-spherical lens, the aberration occurred when imaging can be eliminated as much as possible, so as to
Improve image quality.
Generally aspheric surface shape expression formula is：
Z represents the position in 5 direction of optical axis, and r represents the height in the vertical direction of relative optical axis 5, and c represents radius of curvature, k
Represent circular cone coefficient, α4、α6、α8... represent asphericity coefficients.
The application of binary diffraction face can obtain good imaging effect with the aberration of corrective lens.The table of binary diffraction face
Up to formula it is：
C=M (C1R2+C2R4)
M=1 is diffraction time, C1、C2For diffraction coefficient.
This utility model is made a more detailed description referring to table below.
The service band of the camera lens in this programme is 8-12 μm, and short focus focal length is 70mm, and focal length focal length is 270mm.
Wherein, optical component parameter table of the table 1 for the present embodiment, table 2 are aspherical surface data, and table 3 is diffraction surfaces coefficient.
Table 1：Optical component parameter table
Table 2：Aspherical surface data
Table 3：Diffraction surfaces coefficient
Modulation transmission letter when Figure of description Fig. 2 and Fig. 3 are this utility model specific embodiment short focus and focal length state
Number MTF figures, and its transverse axis is per millimeter of demand pairs (line pair per millimeter), the longitudinal axis is contrast numerical value.
It can be seen that in 20lp/mm, short focus or the transmission function of focal length have all reached more than 50%, it is obtained
The image of higher quality, this utility model non-brake method double-view field imaging lens have preferable optical effect.
Can be seen that this utility model realizes focal length uncooled IRFPAs using eyeglass switching mode from above-mentioned data
Visual field switching, and be obtained in that clearly image.Five lens are only used, and all adopts germanium material, there is no expensive material
The use of material, reduces the cost of camera lens.Suitching type double-view field camera lens so that visual field switching time is than move mode on axle more
It is short, advantageously in the tracking of target.Camera lens most focal length reaches more than 250mm so that uncooled IRFPAs video camera possesses more
Remote operating distance.
Certainly, the design parameter in above table is merely an illustrative, and the parameter of each lens is not limited to by above-mentioned each number
Value shown by value embodiment, can reach similar technique effect using other values.Meanwhile, described above is simultaneously
Non- is the restriction to utility model, and this utility model is also not limited to the example above, those skilled in the art
Change, remodeling, addition or the replacement made in essential scope of the present utility model, should also belong to protection of the present utility model
Scope.
Claims (9)
1. a kind of non-brake method double-view field imaging lens, it is characterised in that imaging lens are made up of five lens, from thing side to
Image side is followed successively by the first lens, the second lens, the 3rd lens, the 4th lens and the 5th lens；Five lens are divided into according to function
First fixed group, switch zoom group, fix group and focusing group afterwards；Front fixed group is the first lens, and switching zoom group is by the second lens
Constitute with the 3rd lens, fixed group is the 4th lens afterwards, and focusing group is the 5th lens.
2. a kind of non-brake method double-view field imaging lens according to claim 1, it is characterised in that five lens are all germanium
Material lenticular.
3. a kind of non-brake method double-view field imaging lens according to claim 1, it is characterised in that first lens are
Meniscus lens, lens centre are fixed on the straight line of optical axis place and immovable；
Second lens are biconcave lenss, and the 3rd lens are biconvex lens, switch zoom group and cut out reality perpendicular to optical axis
Existing visual field handoff functionality；
4th lens are diverging meniscus lenses, and lens centre is fixed on the straight line of optical axis place and immovable；
5th lens are biconvex lens, are realized to far and near target focusing function along optical axis movement.
4. a kind of non-brake method double-view field imaging lens according to claim 3, it is characterised in that the first described lens
For positive meniscus lens from a piece of convex surface to thing side；The second described lens are double-concave negative lens, and the 3rd lens are biconvex positive lens；
The 4th described lens are negative meniscus lens of a piece of convex surface to thing side；The 5th described lens are biconvex positive lens.
5. a kind of non-brake method double-view field imaging lens according to claim 1, it is characterised in that first lens
Diameter meets following condition with longest focal length：
1.0<D1/ft<1.2,
ft>250mm,
Wherein, D1Represent the diameter of the first lens, ftRepresent the non-brake method double-view field imaging lens be in focal length state when
Focal length.
6. a kind of non-brake method double-view field imaging lens according to claim 1, it is characterised in that fixed group before described,
Switching zoom group meets following condition with the focal length of rear fixed group：
f1/ft>1.4,
0<f2/ft<0.4,
-1.2<f3/ft<- 0.8,
Wherein, f1The focal length of fixed group, f before representing2Represent the focal length of switching zoom group, f3The focal length of fixed group, f after expressiontTable
Show the non-brake method double-view field imaging lens be in focal length state when focal length.
7. a kind of non-brake method double-view field imaging lens according to claim 1, it is characterised in that the switching zoom group
With latter fixed group at least respectively select surface to be aspheric surface, while processing binary on a non-spherical surface at least in
Diffraction surfaces.
8. a kind of non-brake method double-view field imaging lens according to claim 1, it is characterised in that at latter fixed group towards thing
Side surface arranges aperture diaphragm.
9. a kind of non-brake method double-view field imaging lens according to claim 1, it is characterised in that the first lens are towards thing
The surface of side arranges hard carbon films, and in addition to surface of first lens towards thing side, other lenses surface arranges infrared anti-reflection film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621022077.XU CN206057670U (en) | 2016-08-30 | 2016-08-30 | A kind of non-brake method double-view field imaging lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621022077.XU CN206057670U (en) | 2016-08-30 | 2016-08-30 | A kind of non-brake method double-view field imaging lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206057670U true CN206057670U (en) | 2017-03-29 |
Family
ID=58374252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621022077.XU Active CN206057670U (en) | 2016-08-30 | 2016-08-30 | A kind of non-brake method double-view field imaging lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206057670U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106125278A (en) * | 2016-08-30 | 2016-11-16 | 北京和普威视科技股份有限公司 | A kind of non-brake method double-view field imaging lens |
| CN110731750A (en) * | 2019-09-26 | 2020-01-31 | 浙江大学 | intelligent vision detection device and detection method |
| CN111736327A (en) * | 2020-05-13 | 2020-10-02 | 福建福光天瞳光学有限公司 | Light and small uncooled long-wave infrared double-view-field lens and imaging method thereof |
-
2016
- 2016-08-30 CN CN201621022077.XU patent/CN206057670U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106125278A (en) * | 2016-08-30 | 2016-11-16 | 北京和普威视科技股份有限公司 | A kind of non-brake method double-view field imaging lens |
| CN110731750A (en) * | 2019-09-26 | 2020-01-31 | 浙江大学 | intelligent vision detection device and detection method |
| CN111736327A (en) * | 2020-05-13 | 2020-10-02 | 福建福光天瞳光学有限公司 | Light and small uncooled long-wave infrared double-view-field lens and imaging method thereof |
| CN111736327B (en) * | 2020-05-13 | 2024-03-01 | 福建福光天瞳光学有限公司 | Light and small uncooled long-wave infrared double-view-field lens and imaging method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101135770B (en) | Zoom lens | |
| CN203981958U (en) | A kind of large zoom ratio medium wave infrared continuous zoom lens | |
| CN206057670U (en) | A kind of non-brake method double-view field imaging lens | |
| CN108254907B (en) | Zoom lens | |
| CN110764237B (en) | Lens | |
| CN106125278B (en) | A kind of non-brake method double-view field imaging lens | |
| CN112612129B (en) | Miniaturized medium-wave infrared refrigeration continuous zoom lens and optical system | |
| CN101950067B (en) | Long-wavelength infrared continuous zoom lens | |
| CN106908940A (en) | The method of zoom lens, imaging device and manufacture zoom lens | |
| CN106842527A (en) | A kind of zoom lens | |
| CN204422855U (en) | A kind of continuous vari-focus non-brake method focal length imaging lens | |
| CN110749987B (en) | Lens | |
| CN205809398U (en) | A kind of large aperture long wave double-view field infrared optical lens | |
| CN205263386U (en) | Long -focus long wave infrared continuous zoom lens | |
| CN201852990U (en) | Long-wave infrared continuous zoom lens | |
| CN107193113B (en) | For shooting the overall movement focusing bugeye lens of spherical screen stereoscopic film | |
| CN103901592B (en) | A kind of infrared continuous zoom lens | |
| JP2019040020A (en) | Zoom lens and imaging device | |
| CN208672900U (en) | A kind of medium wave refrigeration infrared continuous zoom lens | |
| CN103901589A (en) | Zoom lens | |
| JPS6035649B2 (en) | Optically corrected zoom lens | |
| CN110646927A (en) | Super wide angle super large light ring optical lens | |
| CN216133244U (en) | High-zoom-ratio long-wave infrared continuous zoom lens | |
| CN211627923U (en) | Super wide angle super large light ring optical lens | |
| CN204439920U (en) | A kind of wide-angle zoom object lens of constant aperture |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 101111 608, building 2, Changyuan Tiandi building, No. 18, Suzhou street, Haidian District, Beijing Patentee after: Shandong hepuwei optoelectronics Co.,Ltd. Address before: 101111 608, building 2, Changyuan Tiandi building, No. 18, Suzhou street, Haidian District, Beijing Patentee before: HOPE WISH PHOTOELECTRONICS TECHNOLOGY Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP03 | Change of name, title or address |
Address after: 250000 room 524-7, floor 5, building 2, Jinan Supercomputing Center Science Park, No. 28666 jingshidong Road, Jinan area, China (Shandong) pilot Free Trade Zone, Jinan City, Shandong Province Patentee after: Hopewell optoelectronics Co.,Ltd. Address before: 101111 608, building 2, Changyuan Tiandi building, No. 18, Suzhou street, Haidian District, Beijing Patentee before: Shandong hepuwei optoelectronics Co.,Ltd. |
|
| CP03 | Change of name, title or address |