CN105372796B - In refrigeration-type Shared aperture/long two grades of varifocal optical systems of infrared double-waveband double-view field - Google Patents
In refrigeration-type Shared aperture/long two grades of varifocal optical systems of infrared double-waveband double-view field Download PDFInfo
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- CN105372796B CN105372796B CN201510891142.6A CN201510891142A CN105372796B CN 105372796 B CN105372796 B CN 105372796B CN 201510891142 A CN201510891142 A CN 201510891142A CN 105372796 B CN105372796 B CN 105372796B
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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
- G02B15/163—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 first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group
- G02B15/167—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 first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses
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Abstract
The invention discloses in a kind of refrigeration-type Shared aperture/long two grades of varifocal optical systems of infrared double-waveband double-view field, including the first pair of bent moon positive lens set gradually along optical axis, second pair of bent moon positive lens, first pair of diverging meniscus lens, 3rd pair of positive meniscus lens, second pair of diverging meniscus lens, for reflecting medium-wave infrared light, transmit the first Amici prism of LONG WAVE INFRARED light, the 4th pair of bent moon positive lens are set gradually by the reflected light path of the medium-wave infrared light of first Amici prism, air-spaced doublet group, first biconvex lens, second biconcave lens, 6th pair of bent moon positive lens, 7th pair of bent moon positive lens, the 8th pair of bent moon positive lens are set gradually by the transmitted light path of the LONG WAVE INFRARED light of first Amici prism, second biconvex lens, 3rd biconcave lens, 3rd pair of diverging meniscus lens, 9th pair of bent moon positive lens；The air-spaced doublet group is made up of with the 5th pair of bent moon positive lens thoroughly the first concave-concave.The present invention being capable of high precision tracking, detection, seizure target image.
Description
Technical field
The invention belongs to optical devices technologies field, and in particular in a kind of refrigeration-type Shared aperture/long infrared double-waveband is double
Two grades of visual field varifocal optical system.
Background technology
Target is found in time in order to quick under round-the-clock environment, realizes the real-time tracking to target and accurate measurement, it is right
Infrared imaging optical system small light, reaction speed and real-time propose higher and higher requirement.With in industrial detection
It is increasingly sophisticated with the extensive use in security protection investigation field, and application environment, the image for obtaining the different visual fields of target should be sought, also
Need to obtain the infrared image of target.In this context, the integrated continuous vari-focus infrared optical system of multiple wave bands arises at the historic moment,
Infrared double-waveband system can simultaneously be detected to different radiation wave band measured objects, and under conditions of having mist or blocking, be had
Good smog, dust penetration capacity, without limiting round the clock.Therefore, infrared double-waveband varifocal optical system because its observation scope is wide,
Measurement accuracy height, good concealment, meet all weather operations environment and be used widely.
Polaroid structure being used existing refrigeration mode optical system, system radial dimension is excessive, and volume also increases therewith more
Greatly, it is typically that individually designed is separated to medium-wave infrared and LONG WAVE INFRARED imaging band for existing infrared double-waveband optical system,
Then clamping constitutes infrared double-waveband optical system together, so also results in system bulk larger.In addition, optical system
Zoom form is generally continuous vari-focus or horizontal suitching type zoom, and such optical system is needed according to different-waveband in observation process
Toggled with visual field, time-consuming for continuous vari-focus search target and optical switching process, and the real-time and reaction speed of system are low.
The content of the invention
In view of this, it is a primary object of the present invention to providing in a kind of refrigeration-type Shared aperture/long infrared double-waveband double vision
The two grades of varifocal optical systems in field.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
The embodiment of the present invention provided in a kind of refrigeration-type Shared aperture/long two grades of Zoom optical systems of infrared double-waveband double-view field
System, first couple of bent moon positive lens L1 that the system includes setting gradually along optical axis, the second couple of bent moon positive lens L2, first pair it is negative curved
It is month lens L3, the 3rd couple of positive meniscus lens L4, the second couple of diverging meniscus lens L5, red for reflecting medium-wave infrared light, transmission long wave
First Amici prism L6 of outer light, the 4th is set gradually by the reflected light path of the medium-wave infrared light of the first Amici prism L6
Double bent moon positive lens L7, air-spaced doublet group, the first biconvex lens L10, the second biconcave lens L11, the 6th pair of bent moon positive lens
L12, the 7th couple of bent moon positive lens L13, set gradually by the transmitted light path of the LONG WAVE INFRARED light of the first Amici prism L6
8th couple of bent moon positive lens L14, the second biconvex lens L15, the 3rd biconcave lens L16, the 3rd couple of diverging meniscus lens L17, the 9th
Double bent moon positive lens L18；The air-spaced doublet group is made up of first biconcave lens L8 and the 5th couple of bent moon positive lens L9.
In such scheme, second couple of bent moon positive lens L2 dorsad object distance face added with aspherical.
In such scheme, the 3rd couple of positive meniscus lens L4 is towards object distance face added with diffractive-aspherical.
In such scheme, the first biconvex lens L10 is towards the face of object distance added with aspherical.
In such scheme, the face of the 3rd biconcave lens L16 dorsad object distances is added with diffractive-aspherical.
Compared with prior art, beneficial effects of the present invention：
The present invention uses secondary imaging structure, can be kept away to meet the structural requirement of refrigeration mode optical system
Exempt from the problem of Polaroid structure radial direction bore is excessive, it is ensured that system reaches 100% cold stop efficiency, improve the spirit of system
Sensitivity, can effectively reject the spuious infra-red radiation beyond field of regard, reach high precision tracking, detection, catch target image
Purpose.
The present invention uses refrigeration-type infrared optical system, and infrared double-waveband Shared aperture is combined with secondary imaging structure, kept away
The problem of Polaroid structure radial direction bore is excessive is exempted from, it is ensured that system reaches 100% cold stop efficiency, can effectively reject
Spuious infra-red radiation beyond field of regard, reaches high precision tracking, detection, the purpose for catching target image.
Present invention introduces aspherical and diffraction element, using optical passive mode athermal mode, pass through each light of reasonable distribution
The focal power of element is learned, the expand with heat and contract with cold image planes defocus of generation of image planes defocus and the instrument for producing optical system is offseted, guarantor
The stability of image planes has been demonstrate,proved, the vertical axial aberration and chromatic longitudiinal aberration of system is reduced.
The present invention devises 122 °/40.49 ° double-view fields of axial type, 3um-5um medium wave 8um-12um LONG WAVE INFRARED two wavebands
Two grades of varifocal optical systems, realize big visual field fast search and small field of view accurate tracking, handoff procedure is without visual field transition mutations, phase
Than continuous zooming optical system, zoom and accurate focusing function are achieved that without the another focus adjusting mechanism that sets.
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.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
The embodiment of the present invention provided in a kind of refrigeration-type Shared aperture/long two grades of Zoom optical systems of infrared double-waveband double-view field
System, as shown in figure 1, the system along optical axis set gradually it is public before fixed group, public zoom group, public compensation group, it is public after
Fixed group and the first Amici prism L6 for reflecting medium-wave infrared light, transmiting LONG WAVE INFRARED light；First Amici prism
It is provided with L6 reflected light path after medium-wave infrared light and fixes group, length is provided with the transmitted light path of the first Amici prism L6
Group is fixed after the infrared focal length compensation group of ripple and LONG WAVE INFRARED light.The first Amici prism L6 is made up of GERMANIUM.
The public preceding fixed group includes the first couple of bent moon positive lens L1 set gradually along optical axis direction and second pair curved
Month positive lens L2, second couple of bent moon positive lens L2 dorsad object distance face added with aspherical；First couple of bent moon positive lens L1
It is made with second couple of bent moon positive lens L2 by GERMANIUM.
The public zoom group includes the first couple of diverging meniscus lens L3 set gradually along optical axis direction；Described first pair is born
Meniscus lens L3 is made up of GERMANIUM.
The public compensation group includes the 3rd couple of positive meniscus lens L4, the 3rd couple of positive meniscus lens L4 towards object distance face
Added with diffractive-aspherical；3rd couple of positive meniscus lens L4 is made up of GERMANIUM.Fixed group includes second pair of negative bent moon after public
Lens L5；Second couple of diverging meniscus lens L5 is made up of CSBR.
After medium-wave infrared fixed group include the 4th couple of bent moon positive lens L7 that Amici prism L6 reflected light path sets gradually,
The air-spaced doublet group of first biconcave lens L8 and the 5th pair of bent moon positive lens L9 composition, the first biconvex lens L10, the second concave-concave
Lens L11, the 6th couple of bent moon positive lens L12 and the 7th couple of bent moon positive lens L13；Wherein, the 4th couple of bent moon positive lens L7
It is made up of CSBR；The first biconcave lens L8 is made up of SILICONZ；The 5th couple of bent moon positive lens L9 is made up of ZNSE；
The first biconvex lens L10 is towards the face of object distance added with aspherical, and the first biconvex lens L10 is made up of SILICON；Institute
The second biconcave lens L11 is stated to be made up of GERMANIUM；The 6th couple of bent moon positive lens L12 is made up of SILICON；Described
Seven couples of bent moon positive lens L13 are towards the face of object distance added with diffraction surfaces, and the 7th couple of bent moon positive lens L13 is made up of ZNSE.
The air-spaced doublet group is the focal power in order to be organized after sharing system, the free degree of increase correction system aberration,
Very big effect is played to correction system spherical aberration and chromatism of position.
Fixed group includes the 8th pair of bent moon positive lens that Amici prism L6 transmitted light path is set gradually after LONG WAVE INFRARED
L14, the second biconvex lens L15, the 3rd biconcave lens L16, the 3rd couple of diverging meniscus lens L17 and the 9th couple of bent moon positive lens L18；
Wherein, the 8th couple of bent moon positive lens L14 is made up of CSBR；The second biconvex lens L15 is made up of GAAS；Described 3rd
The face of biconcave lens L16 dorsad object distances is added with diffractive-aspherical, and the 3rd biconcave lens L16 is made up of GERMANIUM；It is described
3rd couple of diverging meniscus lens L17 and the 9th couple of bent moon positive lens L18 is made by GAAS.
Described 4th couple of bent moon positive lens L7 and the 8th couple of bent moon positive lens L14 plays a part of field lens, reduces system
The radial dimension organized afterwards, shortens the position in Polaroid face, makes overall system architecture compacter.
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, using tri- kinds of optical materials of GERMANIUM, ZNSE and CSBR, its physical and chemical performance is relatively stable, advantageously reduces broadband
The aberration of generation.Zoom form makes double-view field freely cut using mechanical positive group compensating form by the axial movement of zoom group
Change, in order to balance the system aberration of common portion, before place is public second lens of fixed group dorsad object distance face added with aspherical.
The face S8 of second couple of positive meniscus lens L4 of public compensation group dorsad object distances is added with diffraction surfaces.Fixed group first after medium-wave infrared light
Biconvex lens L10 is towards the face of object distance added with aspherical, and the face of the 7th couple of bent moon positive lens Ll 3 dorsad object distances is added with diffraction surfaces.
The second biconcave lens L16 of group is fixed after LONG WAVE INFRARED light towards the face of object distance added with diffractive-aspherical.Passively compensated using focal length
Method, by adding the compensation of focal length compensation group by the inconsistent caused focal length variations amount of wavelength, is less than the focal length difference of two waveband
Depth of focus value.
In view of the domestic 640*512 high-resolution infrared double-color detector required currently without the present invention is met, so right
The system carries out light splitting setting.The present invention is broadly divided into nine constituent elements, is respectively：It is fixed group before public, public zoom group, public
Fixed group focal length after group, medium-wave infrared light is fixed after compensation group, public rear fixed group, one group of Amici prism, medium-wave infrared light to mend
Repay and fixed group focal length compensation group after group and LONG WAVE INFRARED light is fixed after group, LONG WAVE INFRARED light.The public preceding fixed group is two
The double bent moon positive lens of piece, the public zoom group is a piece of pair of bent moon negative lens group, and the public compensation group is a piece of pair of bent moon
Positive lens；The public rear fixed group is a piece of pair of bent moon negative lens；First component light prismatic reflection medium-wave infrared light, transmission length
Ripple infrared light.
Fixed group is the double bent moon positive lens of two panels before public, is GERMANIUM along optical axis direction material, wherein second
Lens dorsad object distance face added with aspherical.Public zoom group is a piece of pair of bent moon negative lens, and material is GERMANIUM.Public benefit
It is a piece of pair of bent moon positive lens to repay group；Along optical axis direction material be GERMANIUM, wherein first towards object distance face added with diffraction
Face.Fixed group is a piece of pair of bent moon negative lens after public；It is CSBR along optical axis material.First group of Amici prism, material is
GERMANIUM.Fixed group includes the 4th couple of bent moon positive lens L7 that Amici prism reflected light path is set gradually after medium-wave infrared, the
The air-spaced doublet group that one biconcave lens L8 and the 5th couple of bent moon positive lens L9 is constituted, the first biconvex lens L10, the second concave-concave is saturating
Mirror L11, the 6th couple of bent moon positive lens L12 and the 7th couple of bent moon positive lens L13；Wherein, the 4th couple of bent moon positive lens L7 is by CSBR
It is made；First biconcave lens L8 is made up of SILICONZ；5th couple of bent moon positive lens L9 is made up of ZNSE；First biconvex lens
L10 is towards the face of object distance added with aspherical, and the first biconvex lens L10 is made up of SILICON；Second biconcave lens L11 by
GERMANIUM is made；6th couple of bent moon positive lens L12 is made up of SILICON；7th couple of bent moon positive lens L13 is towards object distance
Face is made up added with diffraction surfaces, the 7th couple of bent moon positive lens L13 of ZNSE.Fixed group includes the saturating of Amici prism L6 after LONG WAVE INFRARED
The 8th couple of bent moon positive lens L14 that light path is set gradually is penetrated, the second biconvex lens L15, the 3rd biconcave lens L16, the 3rd pairs is born
Meniscus lens L17 and the 9th couple of bent moon positive lens L18；Wherein, the 8th couple of bent moon positive lens L14 is made up of CSBR；Second biconvex
Lens L15 is made up of GAAS；The face of 3rd biconcave lens L16 dorsad object distances added with diffractive-aspherical, the 3rd biconcave lens L16 by
GERMANIUM is made；3rd couple of diverging meniscus lens L17 and the 9th couple of bent moon positive lens L18 is made by GAAS.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 refrigeration-type mouth altogether
In footpath/long infrared double-waveband double-view field two grades of varifocal optical system structural parameters (lens curvature, thickness, lens separation and materials
Material).
In the refrigeration-type Shared aperture of table 1/long two grades of varifocal optical system structural parameters of infrared double-waveband double-view field
Table 2 represents the data (amount of movement of zoom group and compensation group) relevant with compensation group with zoom group.
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 6.36/mm | Focal length 31.1/mm | |
| D2 | 1.95 | 30.257 |
| D4 | 63.032 | 27.946 |
| D6 | 6.405 | 13.184 |
Aspherical, diffraction surfaces data that the expression system of table 3 is used.
Table 3 implements aspherical and diffraction surfaces coefficient
The use process of the present invention is as follows：
During system use, public preceding fixed group is fixed, and public zoom group changes system by being axially moveable
System focal length, realizes that double-view field switches.Again after prismatic decomposition, Shared aperture part institute is compensated by fixing group after LONG WAVE INFRARED light
The aberration of substitution, finally by long wave refrigeration receiving device imaging, medium-wave infrared light after focal length compensation group and medium wave by fixing group
To compensate the aberration that focal length difference between LONG WAVE INFRARED and medium-wave infrared and Shared aperture part are introduced so that medium-wave infrared with
LONG WAVE INFRARED two waveband focal length difference is less than the minimum depth of focus value of system, finally by medium-wave infrared refrigeration receiving device imaging.L19 is
The protective glass of system, L20 is the cold stop of system, and L21 is reception image planes.
In this refrigeration-type Shared aperture/long two grades of varifocal optical systems of infrared double-waveband double-view field can it is larger in day and night temperature,
Observed object under the adverse circumstances such as flue dust interference, haze, by Shared aperture part, Amici prism, by two infrared spies of refrigeration mode
Survey device to receive respectively, realize and the big visual field fast search of short focus is carried out to target, focal length small field of view is examined, so that system
Reaction speed is greatly improved, and efficiently avoid the faster target of translational speed is lost due to light path converting.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (5)
1. in a kind of refrigeration-type Shared aperture/long two grades of varifocal optical systems of infrared double-waveband double-view field, it is characterised in that the system
Including the first couple of bent moon positive lens L1 set gradually along optical axis, the second couple of bent moon positive lens L2, the first couple of bent moon negative lens L3,
The 3rd couple of bent moon positive lens L4, the second couple of bent moon negative lens L5, for reflecting medium-wave infrared light, transmiting the first of LONG WAVE INFRARED light
Amici prism L6, sets gradually the 4th pair of bent moon just saturating by the reflected light path of the medium-wave infrared light of the first Amici prism L6
Mirror L7, air-spaced doublet group, the first biconvex lens L10, the second biconcave lens L11, the 6th couple of bent moon positive lens L12, the 7th pair
Bent moon positive lens L13, the 8th pair of bent moon is set gradually by the transmitted light path of the LONG WAVE INFRARED light of the first Amici prism L6
Positive lens L14, the second biconvex lens L15, the 3rd biconcave lens L16, the 3rd pair of bent moon negative lens L17, the 9th pair of bent moon are just saturating
Mirror L18；The air-spaced doublet group is made up of first biconcave lens L8 and the 5th couple of bent moon positive lens L9.
2. in refrigeration-type Shared aperture according to claim 1/long two grades of varifocal optical systems of infrared double-waveband double-view field, its
It is characterised by：Second couple of bent moon positive lens L2 dorsad object distance face added with aspherical.
3. in refrigeration-type Shared aperture according to claim 1 or 2/long two grades of Zoom optical systems of infrared double-waveband double-view field
System, it is characterised in that：The 3rd couple of bent moon positive lens L4 dorsad object distance face added with diffraction surfaces.
4. in refrigeration-type Shared aperture according to claim 3/long two grades of varifocal optical systems of infrared double-waveband double-view field, its
It is characterised by：The first biconvex lens L10 is towards the face of object distance added with aspherical.
5. in refrigeration-type Shared aperture according to claim 4/long two grades of varifocal optical systems of infrared double-waveband double-view field, its
It is characterised by：The 3rd biconcave lens L16 is towards the face of object distance added with diffractive-aspherical.
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| CN108152937B (en) * | 2017-11-13 | 2020-04-14 | 长春理工大学 | Infrared medium/long wave zooming projection lens |
| 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 |
| CN110830682A (en) * | 2018-08-14 | 2020-02-21 | 西安应用光学研究所 | Optical structure for weakening cat eye effect |
| 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 |
| CN110177198B (en) * | 2019-06-28 | 2023-09-05 | 中山联合光电科技股份有限公司 | Double-light zooming optical system applied to monitoring system |
| CN111443472B (en) * | 2020-05-18 | 2022-03-01 | 苏州东方克洛托光电技术有限公司 | Long-focal-length high-zoom-ratio medium-wave infrared continuous zooming optical system |
| CN112180578B (en) * | 2020-09-25 | 2021-08-17 | 中国科学院西安光学精密机械研究所 | Visible light-medium wave infrared dual-waveband common-aperture 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 |
| CN113514942B (en) * | 2021-04-22 | 2023-06-30 | 浙江大学 | Infrared dual-resolution optical imaging system |
| CN113589502A (en) * | 2021-07-05 | 2021-11-02 | 湖北华中光电科技有限公司 | Large-visual-field visible light and near-infrared light common-path zooming imaging system |
| CN114578531B (en) * | 2022-03-11 | 2024-03-12 | 深圳市誉和光学精密刀具有限公司 | Infrared optical system and infrared lens |
| CN114624896B (en) * | 2022-03-11 | 2023-06-30 | 中国航空工业集团公司洛阳电光设备研究所 | Long-focus double-view-field television/short-wave infrared common-path optical system |
| CN116047714B (en) * | 2022-12-25 | 2024-03-15 | 福建福光股份有限公司 | Laser infrared common-aperture dual-mode optical system |
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| CN103278927B (en) * | 2013-06-21 | 2015-05-13 | 西安工业大学 | Two-waveband hole-diameter-shared light-path-shared zoom-shared imaging optical system |
| CN104238099A (en) * | 2014-09-18 | 2014-12-24 | 西安工业大学 | Large-zoom-ratio infrared dual-band common-caliber common-zooming optical system |
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