CN106950684A - A kind of integrated infrared double-waveband 20X varifocal optical systems - Google Patents
A kind of integrated infrared double-waveband 20X varifocal optical systems Download PDFInfo
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- CN106950684A CN106950684A CN201710241471.5A CN201710241471A CN106950684A CN 106950684 A CN106950684 A CN 106950684A CN 201710241471 A CN201710241471 A CN 201710241471A CN 106950684 A CN106950684 A CN 106950684A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/16—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
- G02B15/177—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a negative front lens or group of lenses
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Abstract
The invention discloses a kind of integrated infrared double-waveband 20X varifocal optical systems, by along optical axis from left to right set gradually it is public before fixed group, public zoom group, public compensation group, it is public after fixed group, constitute for seven parts of fixed group after the medium-wave infrared focal length compensation group and medium-wave infrared light that reflect medium-wave infrared light and transmit the Amici prism of LONG WAVE INFRARED light, group is fixed after the LONG WAVE INFRARED light that sets on the transmitted light path of Amici prism, set on Amici prism reflected light path.The present invention is during continuous vari-focus, and two waveband correspondence focal length difference is less than its depth of focus, and two waveband target information can be received by same system, and does not need light path switching, solves the problem of current two waveband systems face.
Description
【Technical field】
The invention belongs to optical devices technologies field, and in particular to a kind of integrated infrared double-waveband 20X varifocal optical systems.
【Background technology】
As developing rapidly for infrared thermal imaging technique is increasingly sophisticated with use environment, the spy to varifocal imaging optical system
Survey scope, the detection performance requirement such as synchronism and real-time more and more high.Focused relative to infrared single band, infrared list
Wave band pinpoints zoom and the small zoom ratio varifocal optical system of single band, two waveband even multiband continuous zooming optical system tool
There is bigger advantage, more observation passages can be possessed, be conducive to more quickly finding target in the range of wide detection range,
More fully target information is resulted in, can also realize that the big visual field of short focus is continuously searched for, the accurate object observing of focal length small field of view.
Therefore, infrared multiband continuous zooming optical system has become Development of Infrared Technique and an important directions of application.It is such
System possesses the ability of detection target in the wide investigative range of multiband, and the measured target of different radiation wave bands can be detected simultaneously,
Also the complicated severe working environments such as smog interference, day alternates with night, volcano eruption are adapted to.
The method that current studies in China infrared double-waveband varifocal optical system is used is usually to design two single spoke
This two optical system, is then assembled into same lens barrel by ejected wave section optical system by mechanical structure, and final realization is double
Wave band zoom detects the purpose of target.Such a system is typically observed by using double light path switching, searches for target, faces
Switching time it is long the problem of., can and two systems wider because of zooming range if two single band system zoom ratio is larger
Centre wavelength between difference, cause light path switch after, etching system detection range changes and causes target to be lost when front and rear
Lose, system reliability will be reduced.
【The content of the invention】
It is an object of the invention to solve above-mentioned the problems of the prior art, propose that a kind of integrated infrared double-waveband 20X becomes
Focus optical system, the system is during continuous vari-focus, and two waveband correspondence focal length difference is less than its depth of focus, two waveband target information
It can be received by same system, and not need light path switching, solve the problem of current two waveband systems face.
To reach above-mentioned purpose, the present invention is achieved using following technical scheme:
A kind of integrated infrared double-waveband 20X varifocal optical systems, including the public preceding fixation set gradually along optical axis direction
Group, the public zoom group that can be axially moveable, public compensation group, it is public after fixed group and for reflect LONG WAVE INFRARED light,
Transmit the Amici prism of medium-wave infrared light;It is provided with the reflected light path of Amici prism after medium-wave infrared light and fixes group, reflected light
It is imaged by medium wave non-brake method receiving device;It is provided with the transmitted light path of Amici prism after LONG WAVE INFRARED light and fixes group, transmitted light
It is imaged by LWIR Uncooled receiving device.
The present invention is further improved:
Fixed group includes the first pair of bent moon positive lens set gradually along optical axis direction before public and first pair of bent moon is negative saturating
Mirror, first pair of bent moon negative lens is towards object distance face added with diffractive-aspherical.
First pair of bent moon positive lens is made up of AMTIR1, and first pair of bent moon negative lens is made up of GERMANIUM.
Public zoom group, public compensation group are the second pair of bent moon negative lens, first single recessed set gradually along optical axis direction
Negative lens and first single convex positive lens.
Singly recessed negative lens and first single convex positive lens are made by GERMANIUM for second pair of bent moon negative lens, first.
After medium-wave infrared light fixed group include the second pair of bent moon positive lens set gradually along Amici prism reflected light path and
3rd pair of bent moon positive lens;Wherein, second pair of bent moon positive lens towards the face of object distance added with diffraction surfaces.
Second pair of bent moon positive lens is made up of GERMANIUM, and the 3rd pair of bent moon positive lens are made up of ZNS_BROAD.
After LONG WAVE INFRARED light fixed group include the 4th pair of bent moon positive lens set gradually along Amici prism transmitted light path and
5th pair of bent moon positive lens;Wherein, the 4th pair of bent moon positive lens towards the face of object distance added with diffraction surfaces.
4th pair of bent moon positive lens are made up of GERMANIUM, and the 5th pair of bent moon positive lens are made up of ZNS_BROAD.
Amici prism is made up of GERMANIUM.
Compared with prior art, the invention has the advantages that:
First, the present invention is using the burnt form of Shared aperture co-variation, during continuous vari-focus, with public zoom group and public
Compensation movement between compensation group, it is ensured that image planes are stable, realizes that medium-wave infrared and the co-variation of LONG WAVE INFRARED two waveband Shared aperture are burnt, protects
Hold F numbers and visual field change is consistent, and light path converting need not be carried out and re-searched for, when greatly reducing the reaction of optical system
Between, target not easy to lose;Secondly, two waveband optical system is received in same system during the present invention is used, and complexity is low, volume
Small, compact conformation mitigates cost burden and difficulty of processing, this is for realizing that the densification of system, lightness have important show
Sincere justice;Finally, medium-wave infrared of the present invention focal length difference corresponding with LONG WAVE INFRARED two waveband is controlled within a focal depth range,
Realize medium-wave infrared and LONG WAVE INFRARED two waveband is confocal, and to measured target simultaneous observation, synchronized tracking, synchro measure,
It is easy to the fusion of later image.
【Brief description of the drawings】
Fig. 1 is structural representation of the invention;
Fig. 2 is the schematic diagram of lens of the present invention and lens face.
Wherein, first pair of bent moon positive lens of L1-;First pair of bent moon negative lens of L2-;Second pair of bent moon negative lens of L3-;L4-
First single convex surface negative lens;The single convex positive lens of L5- first;The 3rd pair of bent moon negative lens of L6-;First group of Amici prism of L7-;L8-
Second pair of bent moon positive lens;The 3rd pair of bent moon positive lens of L9-;The 4th pair of bent moon positive lens of L10-;The 5th pair of bent moon of L11- is just saturating
Mirror.
【Embodiment】
The present invention is described in further detail below in conjunction with the accompanying drawings:
The present invention is by the public preceding fixed group from left to right set gradually along optical axis, public zoom group, public compensation group, public affairs
Group is fixed after altogether, for reflecting medium-wave infrared light and transmiting the transmitted light path of the Amici prism of LONG WAVE INFRARED light, Amici prism
The medium-wave infrared focal length compensation group and medium wave for group is fixed after the LONG WAVE INFRARED light of setting, setting on Amici prism reflected light path are red
Seven parts of fixed group composition after outer light, specifically:
Referring to Fig. 1, the present invention along optical axis set gradually it is public before fixed group, public zoom group, public compensation group, public
Group and the Amici prism L7 for reflecting medium-wave infrared light, transmiting LONG WAVE INFRARED light are fixed afterwards;Amici prism L7 transmitted light
Be provided with road after LONG WAVE INFRARED light and fix group, be provided with Amici prism L7 reflected light path medium-wave infrared focal length compensation group and
Group is fixed after medium-wave infrared light.Amici prism L7 is made up of GERMANIUM.
Fixed group includes the first couple of bent moon positive lens L1 set gradually along optical axis direction before public and second pair of bent moon is born
Lens L2, second couple of bent moon negative lens L2 is towards object distance face added with diffractive-aspherical;First couple of bent moon positive lens L1 is by AMTIR1
It is made, second couple of bent moon negative lens L2 is made up of GERMANIUM.
Public zoom group includes the single recessed negative lenses of first couple of bent moon negative lens L3 and first set gradually along optical axis direction
L4;First couple of bent moon negative lens L3 is made up of GERMANIUM;First single recessed negative lens L4 is made up of GERMANIUM.Public compensation
Group includes the first list convex surface positive lens L5;First list convex surface positive lens L5 is made up of GERMANIUM.Fixed group includes the after public
Three couples of bent moon negative lens L6;3rd couple of bent moon negative lens L6 is made up of GERMANIUM.
The reflected light path that fixed group includes Amici prism L7 after the confocal compensation group of infrared double-waveband and medium-wave infrared is set successively
Second couple of bent moon positive lens L8, the 3rd couple of bent moon positive lens L9 put;Wherein, second couple of bent moon positive lens L8 is towards the face of object distance
Added with diffraction surfaces;Second couple of bent moon positive lens L8 is made up of GERMANIUM, and the 3rd couple of bent moon positive lens L9 is by ZNS_BROAD systems
Into.
Fixed group includes the 4th pair of bent moon positive lens that Amici prism L7 transmitted light path is set gradually after LONG WAVE INFRARED
L10, the 5th couple of bent moon positive lens L11;Wherein, the 4th couple of bent moon positive lens L10 towards the face of object distance added with diffraction surfaces;4th pair
Bent moon positive lens L10 is made up of GERMANIUM, and the 5th couple of bent moon positive lens L11 is made up of ZNS_BROAD.
The principle of the present invention:
Shared aperture part of the present invention is the public zoom group by public first fixed group, public compensation group and it is public after fixed group
Composition, and material can pass through medium wave and LONG WAVE INFRARED, wherein tri- kinds of material materializations of AMTIR1, GERMANIUM, ZNS_BROAD
Performance is relatively stable, advantageously reduces the aberration of broadband generation.Zoom form is using mechanical positive group compensating form, zoom ratio
20X is reached, system zoom compensated curve is smooth, two waveband co-variation is burnt.In order to mitigate common portion system aberration burden, place is public
Second lens of group are fixed before altogether towards object distance face added with diffractive-aspherical.First lens direction of fixed group after medium-wave infrared light
The face of object distance is added with diffraction surfaces.First lens of group are fixed after LONG WAVE INFRARED light towards the face of object distance added with diffraction surfaces.Using Jiao
Away from passive penalty method, by adding the compensation of focal length compensation group by the inconsistent caused focal length variations amount of wavelength, make Jiao of two waveband
It is less than depth of focus value away from difference.
Because the domestic infrared double-color detector product for meeting the present invention at present extremely lacks, so being divided the system
Light is set.The present invention is broadly divided into nine constituent elements, is respectively:It is fixed group before public, public zoom group, public compensation group, public
Fix to fix after group, one group of Amici prism, LONG WAVE INFRARED light afterwards and group and the compensation of corresponding focal length are fixed after group, medium-wave infrared light
Group.The public preceding fixed group is a piece of pair of bent moon positive lens and a piece of pair of bent moon negative lens, and the public zoom group is a piece of
Double bent moon negative lenses and a piece of single concave surface negative lens, public compensation group are a piece of single convex surface positive lens, the public rear fixed group
For a piece of pair of bent moon negative lens;First component light prismatic reflection medium-wave infrared light, transmits LONG WAVE INFRARED light.
Fixed group is a piece of pair of bent moon positive lens and a piece of pair of bent moon negative lens before public, is followed successively by along optical axis direction material
AMTIR1 and GERMANIUM, wherein second lens towards object distance face added with diffractive-aspherical.Public zoom group is a piece of double curved
Month negative lens and a piece of single concave surface negative lens, material are GERMANIUM.Public compensation group is a piece of single convex surface positive lens;Edge
Optical axis direction material is GERMANIUM.Fixed group is a piece of pair of bent moon negative lens after public;It is GERMANIUM along optical axis material.
First group of Amici prism, material is GERMANIUM.Fixed group includes the double bent moon positive lens of two panels after LONG WAVE INFRARED light, along optical axis
Direction material is followed successively by GERMANIUM and ZNS_BROAD, wherein first double bent moon positive lens towards the face of object distance added with diffraction
Sphere.Fixed group includes the double bent moon positive lens of two panels after medium-wave infrared light, and GERMANIUM and ZNS_ are followed successively by along optical axis material
BROAD, wherein first lens towards the face of object distance added with diffraction surfaces.As shown in Figure 2.
In order to be described in more detail, the design parameter of optical system structure of the present invention is given below:Table 1 represents integrated infrared double
Wave band 20X varifocal optical systems structural parameters (lens curvature, thickness, lens separation and material);
The integrated infrared double-waveband 20X varifocal optical system structural parameters of table 1
Table 2 represents the data (amount of movement of zoom group and compensation group) relevant with mobile component;
Table 2 implements system each component movement spacing
(D2 is preceding fixed group and the zoom group of zoom group space D 4 and the compensation group of compensation group space D 6 and rear fixed group spacing)
Short focus 12/mm | Secondary short focus 64.3/mm | Middle burnt 121.9/mm | Secondary focal length 182.7/mm | Focal length 240/mm | |
D2 | 1.8 | 29.1 | 46.6 | 62.0 | 72.2 |
D4 | 306.0 | 110.0 | 57.5 | 26.4 | 6.0 |
D6 | 20.8 | 189.5 | 224.5 | 240.2 | 250.5 |
Aspherical, diffraction surfaces data that the expression system of table 3 is used.
Table 3 implements aspherical and diffraction surfaces coefficient
The course of work of the present invention is as follows:
During system use, public preceding fixed group is fixed, and public zoom group is changed by being axially displaced to
The system focal length of medium wave and LONG WAVE INFRARED, to improve zoom ratio, recycles cam mechanism to drive public compensation according to zoom curve
Group changes caused image planes movement to offset by focal length, then after prismatic decomposition, is compensated by fixing group after LONG WAVE INFRARED light
The aberration that Shared aperture part is substituted into, is finally imaged by long wave non-brake method receiving device, and medium-wave infrared light compensates group by focal length
And fix group after medium wave to compensate the focal length difference between LONG WAVE INFRARED and medium-wave infrared and the aberration of Shared aperture part substitution,
So that medium-wave infrared is less than the minimum depth of focus value of system with LONG WAVE INFRARED two waveband focal length difference, finally connect by medium-wave infrared non-brake method
Receive device imaging.
Using this two waveband Shared aperture, light path connects altogether altogether under the adverse circumstances such as day and night temperature is larger, flue dust interference, haze
Continuous varifocal optical system observed object, by Shared aperture part, is then received by two detectors by light splitting, realized to target
The search of short focus big visual field is carried out, focal length small field of view is examined, simultaneity factor can be not required to switching-over light path, realign and again
New search target, but measured target is directly locked, then real-time monitored, synchronous detection, synchronous Search/Track are carried out, it is difficult to lose
Lose target.
The technological thought of above content only to illustrate the invention, it is impossible to which protection scope of the present invention is limited with this, it is every to press
According to technological thought proposed by the present invention, any change done on the basis of technical scheme each falls within claims of the present invention
Protection domain within.
Claims (10)
1. a kind of integrated infrared double-waveband 20X varifocal optical systems, it is characterised in that:Including the public affairs set gradually along optical axis direction
Fixed group before altogether, the public zoom group that can be axially moveable, public compensation group, it is public after fixed group and for reflecting long wave
Infrared light, the Amici prism (L7) for transmiting medium-wave infrared light;Medium-wave infrared light is provided with the reflected light path of Amici prism (L7)
Group is fixed afterwards, and reflected light is imaged by medium wave non-brake method receiving device;It is red that long wave is provided with the transmitted light path of Amici prism (L7)
Group is fixed after outer light, transmitted light is imaged by LWIR Uncooled receiving device.
2. integrated infrared double-waveband 20X varifocal optical systems according to claim 1, it is characterised in that:It is fixed before public
Group includes the first pair of bent moon positive lens (L1) and first pair of bent moon negative lens (L2) set gradually along optical axis direction, and first pair curved
Moon negative lens (L2) is towards object distance face added with diffractive-aspherical.
3. integrated infrared double-waveband 20X varifocal optical systems according to claim 2, it is characterised in that:First pair of bent moon
Positive lens (L1) is made up of AMTIR1, and first pair of bent moon negative lens (L2) is made up of GERMANIUM.
4. integrated infrared double-waveband 20X varifocal optical systems according to claim 1, it is characterised in that:Public zoom group,
Public compensation group is second pair of bent moon negative lens (L3), the first single recessed negative lens (L4) and the set gradually along optical axis direction
One single convex positive lens (L5).
5. integrated infrared double-waveband 20X varifocal optical systems according to claim 4, it is characterised in that:Second pair of bent moon
Negative lens (L3), first single recessed negative lens (L4) and first single convex positive lens (L5) are made by GERMANIUM.
6. integrated infrared double-waveband 20X varifocal optical systems according to claim 1, it is characterised in that:Medium-wave infrared light
Fixed group includes the second pair of bent moon positive lens (L8) set gradually along Amici prism (L7) reflected light path and the 3rd pair of bent moon afterwards
Positive lens (L9);Wherein, second pair of bent moon positive lens (L8) towards the face of object distance added with diffraction surfaces.
7. integrated infrared double-waveband 20X varifocal optical systems according to claim 6, it is characterised in that:Second pair of bent moon
Positive lens (L8) is made up of GERMANIUM, and the 3rd pair of bent moon positive lens (L9) is made up of ZNS_BROAD.
8. integrated infrared double-waveband 20X varifocal optical systems according to claim 1, it is characterised in that:LONG WAVE INFRARED light
Fixed group includes the 4th pair of bent moon positive lens (L10) set gradually along Amici prism (L7) transmitted light path and the 5th pair of bent moon afterwards
Positive lens (L11);Wherein, the 4th pair of bent moon positive lens (L10) towards the face of object distance added with diffraction surfaces.
9. integrated infrared double-waveband 20X varifocal optical systems according to claim 8, it is characterised in that:4th pair of bent moon
Positive lens (L10) is made up of GERMANIUM, and the 5th pair of bent moon positive lens (L11) is made up of ZNS_BROAD.
10. the integrated infrared double-waveband 20X varifocal optical systems according to claim 1 to 9 any one, its feature exists
In:Amici prism (L7) is made up of GERMANIUM.
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Cited By (12)
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CN108152973A (en) * | 2017-12-13 | 2018-06-12 | 北京华航无线电测量研究所 | A kind of visible ray and medium-wave infrared Shared aperture complex optics |
CN108345093A (en) * | 2018-03-23 | 2018-07-31 | 中国科学院西安光学精密机械研究所 | Common-caliber double-view-field double-color infrared imaging lens |
CN108594410A (en) * | 2018-04-13 | 2018-09-28 | 北京理工大学 | Six times of continuous zooming optical systems of hemispherical space far infrared |
CN108693634A (en) * | 2018-04-27 | 2018-10-23 | 中国科学院西安光学精密机械研究所 | Wide-spectrum common-aperture television, infrared zooming imaging and laser tracking guiding optical system |
CN110398832A (en) * | 2019-07-11 | 2019-11-01 | 长春理工大学 | Near-infrared and LONG WAVE INFRARED two waveband microcobjective |
CN110673314A (en) * | 2019-09-29 | 2020-01-10 | 凯迈(洛阳)测控有限公司 | Negative compensation type large-target-surface medium-wave refrigeration infrared continuous zooming optical system |
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CN111381352A (en) * | 2018-12-29 | 2020-07-07 | 中国科学院长春光学精密机械与物理研究所 | Transmission type double-spectrum common-aperture zooming optical system |
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CN108152973B (en) * | 2017-12-13 | 2020-07-17 | 北京华航无线电测量研究所 | Visible light and medium wave infrared common-caliber composite optical system |
CN108345093A (en) * | 2018-03-23 | 2018-07-31 | 中国科学院西安光学精密机械研究所 | Common-caliber double-view-field double-color infrared imaging lens |
CN108594410B (en) * | 2018-04-13 | 2020-06-05 | 北京理工大学 | Hemispherical space far infrared six-time continuous zooming optical system |
CN108594410A (en) * | 2018-04-13 | 2018-09-28 | 北京理工大学 | Six times of continuous zooming optical systems of hemispherical space far infrared |
CN108693634A (en) * | 2018-04-27 | 2018-10-23 | 中国科学院西安光学精密机械研究所 | Wide-spectrum common-aperture television, infrared zooming imaging and laser tracking guiding optical system |
CN111381352A (en) * | 2018-12-29 | 2020-07-07 | 中国科学院长春光学精密机械与物理研究所 | Transmission type double-spectrum common-aperture zooming optical system |
CN110398832A (en) * | 2019-07-11 | 2019-11-01 | 长春理工大学 | Near-infrared and LONG WAVE INFRARED two waveband microcobjective |
CN110673314A (en) * | 2019-09-29 | 2020-01-10 | 凯迈(洛阳)测控有限公司 | Negative compensation type large-target-surface medium-wave refrigeration infrared continuous zooming optical system |
CN111208631A (en) * | 2020-01-08 | 2020-05-29 | 东莞锐星视觉技术有限公司 | Telecentric optical path with double multiplying power |
CN111175949A (en) * | 2020-01-08 | 2020-05-19 | 东莞锐星视觉技术有限公司 | Bilateral double-magnification telecentric lens |
CN111175949B (en) * | 2020-01-08 | 2021-11-12 | 东莞锐星视觉技术有限公司 | Bilateral double-magnification telecentric lens |
CN112180571A (en) * | 2020-09-30 | 2021-01-05 | 中国科学院西安光学精密机械研究所 | Common-aperture infrared dual-waveband dual-field-of-view optical system |
CN112180571B (en) * | 2020-09-30 | 2021-08-17 | 中国科学院西安光学精密机械研究所 | Common-aperture infrared dual-waveband dual-field-of-view optical system |
CN113419337A (en) * | 2021-06-24 | 2021-09-21 | 中国船舶重工集团公司第七0七研究所 | Optical imaging system applied to vehicle-mounted directional measurement |
CN113419337B (en) * | 2021-06-24 | 2023-03-07 | 中国船舶重工集团公司第七0七研究所 | Optical imaging system applied to vehicle-mounted directional measurement |
CN114460727A (en) * | 2022-01-25 | 2022-05-10 | 凯迈(洛阳)测控有限公司 | Long-focus and miniature medium-wave refrigeration infrared continuous zooming optical system |
CN114460727B (en) * | 2022-01-25 | 2023-06-23 | 凯迈(洛阳)测控有限公司 | Long-focus miniaturized medium wave refrigerating infrared continuous zooming optical system |
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