CN105372796A - Refrigeration type common-caliber medium/long-wave infrared double-waveband double-view-field dual-shift zoom optical system - Google Patents
Refrigeration type common-caliber medium/long-wave infrared double-waveband double-view-field dual-shift zoom optical system Download PDFInfo
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- G—PHYSICS
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- 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 a refrigeration type common-caliber m medium/long-wave infrared double-waveband double-view-field dual-shift zoom optical system. The system comprises a first double-crescent positive lens, a second double-crescent positive lens, a first double-crescent negative lens, a third double-crescent positive lens, a second double-crescent negative lens, and a first light splitting prism for reflecting medium-wave infrared light and transmitting long-wave infrared light which are successively arranged along an optical axis. A reflection optical path of the medium-wave infrared light passing through the first light splitting prism is successively provided with a fourth double-crescent positive lens, a dual separate lens group, a first dual convex lens, a second dual concave lens, a sixth double-crescent positive lens and a seventh double-crescent positive lens, and a transmission optical path of the long-wave infrared light passing through the first light splitting prism is successively provided with an eighth double-crescent positive lens, a second dual convex lens, a third dual concave lens, a third double-crescent negative lens and a ninth double-crescent positive lens. The dual separate lens group is composed of a first dual convex lens and a fifth double-crescent positive lens. According to the system provided by the invention, a target image can be tracked, detected and captured in a high-accuracy manner.
Description
Technical field
The invention belongs to optical devices technologies field, to be specifically related in a kind of refrigeration-type Shared aperture/long infrared double-waveband double-view field two grades of varifocal optical systems.
Background technology
In order to Timeliness coverage target quick under round-the-clock environment, realize the real-time follow-up to target and accurately measurement, more and more higher requirement is proposed to infrared imaging optical system small light, reaction velocity and real-time.Along with the widespread use in industrial detection and security protection investigation field, and applied environment is increasingly sophisticated, should ask the image obtaining the different visual field of target, also need the infrared image obtaining target.In this context, the integrated continuous vari-focus infrared optical system of multiple wave band arises at the historic moment, and infrared double-waveband system can detect different radiation wave band measured object simultaneously, and under having mist or having the condition of blocking, there is good smog, dust penetration capacity, without limiting round the clock.Therefore, infrared double-waveband varifocal optical system because its observation scope is wide, measuring accuracy is high, good concealment, meet all weather operations environment and be used widely.
The Polaroid structure of the many employings of existing refrigeration mode optical system, system radial dimension is excessive, volume also increases thereupon, for existing infrared double-waveband optical system, normally to medium-wave infrared and the separately design separately of LONG WAVE INFRARED imaging band, then clamping forms infrared double-waveband optical system together, result also in system bulk so larger.In addition, the zoom form of optical system mostly is continuous vari-focus or horizontal suitching type zoom, this type of optical system needs to switch back and forth according to different-waveband and visual field in observation process, and continuous vari-focus search target and optical switching process length consuming time, real-time and the reaction velocity of system are low.
Summary of the invention
In view of this, fundamental purpose of the present invention to be to provide in a kind of refrigeration-type Shared aperture/long infrared double-waveband double-view field two grades of varifocal optical systems.
For achieving the above object, technical scheme of the present invention is achieved in that
The embodiment of the present invention to provide in a kind of refrigeration-type Shared aperture/long infrared double-waveband double-view field two grades of varifocal optical systems, this system comprises the first couple of bent moon positive lens L1 set gradually along optical axis, second couple of bent moon positive lens L2, first couple of diverging meniscus lens L3, 3rd couple of positive meniscus lens L4, second couple of diverging meniscus lens L5, for reflecting medium-wave infrared light, first Amici prism L6 of transmission LONG WAVE INFRARED light, reflected light path through the medium-wave infrared light of described first Amici prism L6 sets gradually the 4th couple of bent moon positive lens L7, air-spaced doublet group, first biconvex lens L10, second biconcave lens L11, 6th couple of bent moon positive lens L12, 7th couple of bent moon positive lens L13, transmitted light path through the LONG WAVE INFRARED light of described first Amici prism L6 sets gradually the 8th couple of bent moon positive lens L14, second biconvex lens L15, 3rd biconcave lens L16, 3rd couple of diverging meniscus lens L17, 9th couple of bent moon positive lens L18, described air-spaced doublet group is made up of the first biconcave lens L8 and the 5th couple of bent moon positive lens L9.
In such scheme, described second couple of bent moon positive lens L2 is added with aspheric surface in object distance face dorsad.
In such scheme, described 3rd couple of positive meniscus lens L4 is added with diffractive-aspherical towards object distance face.
In such scheme, described first biconvex lens L10 is added with aspheric surface towards the face of object distance.
In such scheme, the face of described 3rd biconcave lens L16 object distance is dorsad added with diffractive-aspherical.
Compared with prior art, beneficial effect of the present invention:
What the present invention adopted is secondary imaging structure, can in order to meet the structural requirement of refrigeration mode optical system, avoid the problem that the radial bore of Polaroid structure is excessive, the system of ensure that reaches 100% cold stop efficiency, the sensitivity of raising system, effectively can reject the spuious infrared radiation beyond field of regard, reach the object of high precision tracking, detection, captured target image.
The present invention adopts refrigeration-type infrared optical system, infrared double-waveband Shared aperture combines with secondary imaging structure, avoid the problem that the radial bore of Polaroid structure is excessive, the system of ensure that reaches 100% cold stop efficiency, effectively can reject the spuious infrared radiation beyond field of regard, reach the object of high precision tracking, detection, captured target image.
The present invention introduces aspheric surface and diffraction element, adopt optical passive mode disappear heat difference mode, by the focal power of each optical element of reasonable distribution, the image planes out of focus that optical system is produced and the instrument image planes out of focus produced of expanding with heat and contract with cold offsets, ensure that the stability of image planes, reduce vertical axial aberration and the chromatic longitudiinal aberration of system.
The present invention devises axial type 122 °/40.49 ° double-view fields, 3um-5um medium wave 8um-12um LONG WAVE INFRARED two waveband two grades of varifocal optical systems, realize Large visual angle fast search and small field of view accurate tracking, handoff procedure is without visual field transition mutations, comparing continuous zooming optical system, just can realize zoom and accurate focusing function without the need to separately establishing focus adjusting mechanism.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the schematic diagram of lens of the present invention and lens face.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The embodiment of the present invention to provide in a kind of refrigeration-type Shared aperture/long infrared double-waveband double-view field two grades of varifocal optical systems, as shown in Figure 1, this system set gradually along optical axis public front fixing group, public zoom group, public compensation group, public rear fixing group and the first Amici prism L6 for reflecting medium-wave infrared light, transmission LONG WAVE INFRARED light; Fix group after the reflected light path of described first Amici prism L6 is provided with medium-wave infrared light, after the transmitted light path of described first Amici prism L6 is provided with LONG WAVE INFRARED focal length compensating group and LONG WAVE INFRARED light, fix group.Described first Amici prism L6 is made up of GERMANIUM.
Described public front fixing group comprises first couple of bent moon positive lens L1 and the second couple of bent moon positive lens L2 set gradually along optical axis direction, and described second couple of bent moon positive lens L2 is added with aspheric surface in object distance face dorsad; Described first couple of bent moon positive lens L1 and second couple bent moon positive lens L2 makes by GERMANIUM.
Described public zoom group comprises the first couple of diverging meniscus lens L3 set gradually along optical axis direction; Described first couple of diverging meniscus lens L3 is made up of GERMANIUM.
Described public compensation group comprises the 3rd couple of positive meniscus lens L4, and described 3rd couple of positive meniscus lens L4 is added with diffractive-aspherical towards object distance face; 3rd couple of positive meniscus lens L4 is made up of GERMANIUM.Public latter fixing group comprises second couple of diverging meniscus lens L5; Second couple of diverging meniscus lens L5 is made up of CSBR.
Air-spaced doublet group that the 4th couple of bent moon positive lens L7, the first biconcave lens L8 and the 5th couple of bent moon positive lens L9 that reflected light path that group comprises Amici prism L6 sets gradually form, the first biconvex lens L10, the second biconcave lens L11, the 6th couple of bent moon positive lens L12 and the 7th couple of bent moon positive lens L13 is fixed after medium-wave infrared; Wherein, described 4th couple of bent moon positive lens L7 is made up of CSBR; Described first biconcave lens L8 is made up of SILICONZ; Described 5th couple of bent moon positive lens L9 is made up of ZNSE; Described first biconvex lens L10 is added with aspheric surface towards the face of object distance, and described first biconvex lens L10 is made up of SILICON; Described second biconcave lens L11 is made up of GERMANIUM; Described 6th couple of bent moon positive lens L12 is made up of SILICON; Described 7th couple of bent moon positive lens L13 is added with diffraction surfaces towards the face of object distance, and described 7th couple of bent moon positive lens L13 is made up of ZNSE.
Described air-spaced doublet group is the focal power in order to organize after sharing system, increases the degree of freedom of corrective system aberration, plays very large effect to corrective system spherical aberration and chromatism of position.
The 8th couple of bent moon positive lens L14, the second biconvex lens L15 that transmitted light path that group comprises Amici prism L6 sets gradually, the 3rd biconcave lens L16, the 3rd couple of diverging meniscus lens L17 and the 9th couple of bent moon positive lens L18 is fixed after LONG WAVE INFRARED; Wherein, described 8th couple of bent moon positive lens L14 is made up of CSBR; Described second biconvex lens L15 is made up of GAAS; The face of described 3rd biconcave lens L16 object distance is dorsad added with diffractive-aspherical, and described 3rd biconcave lens L16 is made up of GERMANIUM; Described 3rd couple of diverging meniscus lens L17 and the 9th couple bent moon positive lens L18 makes by GAAS.
Described 4th couple of bent moon positive lens L7 and the 8th couple bent moon positive lens L14 plays the effect of field lens, and the radial dimension organized after reducing system, shortens the position of Polaroid, makes overall system architecture compacter.
Principle of the present invention
Shared aperture part of the present invention fixes group, public zoom group, public compensation group and public rear fixing group of composition before public, and adopt GERMANIUM, ZNSE and CSBR tri-kinds of optical materials, its physical and chemical performance is comparatively stable, is conducive to the aberration reducing broadband generation.Zoom form adopts mechanical type just to organize compensating form, by moving axially of zoom group, double-view field is freely switched, and in order to balance the system aberration of public part, before place is public, fixing group second lens are added with aspheric surface in object distance face dorsad.The face of public rear fixing group of first lens object distance is dorsad added with aspheric surface, and the face towards object distance is added with diffraction surfaces.Fix group first biconvex lens L10 after medium-wave infrared light and be added with aspheric surface towards the face of object distance, the 7th couple of bent moon positive lens L13 is added with diffraction surfaces towards the face of object distance.Fix group second biconvex lens L15 after LONG WAVE INFRARED light and be added with aspheric surface towards the face of object distance.Adopt the passive penalty method of focal length, compensating by the inconsistent focal length variations amount caused of wavelength by adding focal length compensating group, making the focal length difference of two waveband be less than depth of focus value.
640*512 high resolving power infrared double-color detector required for the present invention is not met, so carry out light splitting setting to native system at present in view of domestic.The present invention is mainly divided into nine constituent elements, is respectively: fixing group focal length compensating group after fixing group and LONG WAVE INFRARED light after fixing group focal length compensating group, LONG WAVE INFRARED light after fixing group, medium-wave infrared light after public front fixing group, public zoom group, public compensation group, public latter fixing group, one group Amici prism, medium-wave infrared light.Described public front fixing group is the two bent moon positive lens of two panels, and described public zoom group is a slice pair bent moon negative lens group, and described public compensation group is the two bent moon positive lens of a slice; Described public latter fixing group is the two bent moon negative lens of a slice; First component light prismatic reflection medium-wave infrared light, transmission LONG WAVE INFRARED light.
Before public, fixing group is the two bent moon positive lens of two panels, and be GERMANIUM along optical axis direction material, wherein second lens is added with aspheric surface in object distance face dorsad.Public zoom group is the two bent moon negative lens of a slice, and material is GERMANIUM.Public compensation group is the two bent moon positive lens of a slice; Be GERMANIUM along optical axis direction material, wherein first is added with diffraction surfaces towards object distance face.Public latter fixing group is the two bent moon negative lens of a slice; Be CSBR along optical axis material.First group of Amici prism, material is GERMANIUM.Fix group after medium-wave infrared and comprise the 4th couple of bent moon positive lens L7 that Amici prism reflected light path sets gradually, the air-spaced doublet group that first biconcave lens L8 and the 5th couple of bent moon positive lens L9 is formed, first biconvex lens L10, second biconcave 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 is made up of CSBR; 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 added with aspheric surface towards the face of object distance, and the first biconvex lens L10 is made up of SILICON; Second biconcave lens L11 is made up of GERMANIUM; 6th couple of bent moon positive lens L12 is made up of SILICON; The 7th couple of bent moon positive lens L13 is added with diffraction surfaces towards the face of object distance, and the 7th couple of bent moon positive lens L13 is made up of ZNSE.The 8th couple of bent moon positive lens L14 that transmitted light path that group comprises Amici prism L6 sets gradually is fixed, 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 after LONG WAVE INFRARED; 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 the 3rd biconcave lens L16 object distance is dorsad added with diffractive-aspherical, and the 3rd biconcave lens L16 is made up of GERMANIUM; 3rd couple of diverging meniscus lens L17 and the 9th couple of bent moon positive lens L18 makes by GAAS.As shown in Figure 2.
In order to be described in more detail, provide the design parameter of optical system structure of the present invention below: table 1 to represent in refrigeration-type Shared aperture/long infrared double-waveband double-view field two grades of varifocal optical system structural parameters (lens curvature, thickness, lens separation and material).
In table 1 refrigeration-type Shared aperture/long infrared double-waveband double-view field two grades of varifocal optical system structural parameters
Table 2 represents the data (amount of movement of zoom group and compensating group) relevant with compensating group with zoom group.
The each component moving interval of table 2 implementation system
(D2 be front fixing group with zoom group space D 4 zoom group and compensating group space D 6 compensating group and rear fixing group of spacing)
| Short burnt 6.36/mm | Focal length 31.1/mm | |
| D2 | 1.95 | 30.257 |
| D4 | 63.032 | 27.946 |
| D6 | 6.405 | 13.184 |
Table 3 represents aspheric surface, diffraction surfaces data that system uses.
Table 3 implements aspheric surface and diffraction surfaces coefficient
Use procedure of the present invention is as follows:
In system use procedure, before public, fixing group maintains static, and public zoom group, by moving change system focal length vertically, realizes double-view field and switches.Again after prismatic decomposition, the aberration that Shared aperture part substitutes into is compensated by fixing group after LONG WAVE INFRARED light, finally by the imaging of long wave refrigeration receiving device, medium-wave infrared light compensates by fixing group after focal length compensating group and medium wave the aberration that focal length difference between LONG WAVE INFRARED and medium-wave infrared and Shared aperture part introduce, medium-wave infrared and LONG WAVE INFRARED two waveband focal length difference is made to be less than the minimum depth of focus value of system, finally by the imaging of medium-wave infrared refrigeration receiving device.L19 is the cover glass of system, and L20 is the cold stop of system, and L21 is for receiving image planes.
In this refrigeration-type Shared aperture/long infrared double-waveband double-view field two grades of varifocal optical systems can observed object under the rugged surroundings such as, flue dust interference comparatively large at day and night temperature, haze, by Shared aperture part, Amici prism, received respectively by two refrigeration type infrared detectors, realize carrying out short burnt Large visual angle fast search to target, focal length small field of view examines, thus system response speed is improved greatly, and efficiently avoid and lose translational speed target faster due to light path converting.
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.
Claims (5)
1. in a refrigeration-type Shared aperture/long infrared double-waveband double-view field two grades of varifocal optical systems, it is characterized in that, this system comprises the first couple of bent moon positive lens L1 set gradually along optical axis, second couple of bent moon positive lens L2, first couple of diverging meniscus lens L3, 3rd couple of positive meniscus lens L4, second couple of diverging meniscus lens L5, for reflecting medium-wave infrared light, first Amici prism L6 of transmission LONG WAVE INFRARED light, reflected light path through the medium-wave infrared light of described first Amici prism L6 sets gradually the 4th couple of bent moon positive lens L7, air-spaced doublet group, first biconvex lens L10, second biconcave lens L11, 6th couple of bent moon positive lens L12, 7th couple of bent moon positive lens L13, transmitted light path through the LONG WAVE INFRARED light of described first Amici prism L6 sets gradually the 8th couple of bent moon positive lens L14, second biconvex lens L15, 3rd biconcave lens L16, 3rd couple of diverging meniscus lens L17, 9th couple of bent moon positive lens L18, described air-spaced doublet group is made up of the 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 infrared double-waveband double-view field two grades of varifocal optical systems, is characterized in that: described second couple of bent moon positive lens L2 is added with aspheric surface in object distance face dorsad.
3. in refrigeration-type Shared aperture according to claim 1 and 2/long infrared double-waveband double-view field two grades of varifocal optical systems, is characterized in that: described 3rd couple of positive meniscus lens L4 is added with diffractive-aspherical towards object distance face.
4. in refrigeration-type Shared aperture according to claim 3/long infrared double-waveband double-view field two grades of varifocal optical systems, is characterized in that: described first biconvex lens L10 is added with aspheric surface towards the face of object distance.
5. in refrigeration-type Shared aperture according to claim 4/long infrared double-waveband double-view field two grades of varifocal optical systems, is characterized in that: the face of described 3rd biconcave lens L16 object distance is dorsad added with diffractive-aspherical.
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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 |
| CN108152937A (en) * | 2017-11-13 | 2018-06-12 | 长春理工大学 | In infrared/long wave Zooming-projection camera lens |
| CN108345093A (en) * | 2018-03-23 | 2018-07-31 | 中国科学院西安光学精密机械研究所 | Shared aperture double-view field Dual band IR imaging lens |
| CN110177198A (en) * | 2019-06-28 | 2019-08-27 | 中山联合光电科技股份有限公司 | A kind of double light varifocal optical systems applied to monitoring system |
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| CN108152937A (en) * | 2017-11-13 | 2018-06-12 | 长春理工大学 | In infrared/long wave Zooming-projection camera lens |
| 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 |
| 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 | Shared aperture double-view field Dual band IR 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 |
| CN110177198A (en) * | 2019-06-28 | 2019-08-27 | 中山联合光电科技股份有限公司 | A kind of double light varifocal optical systems applied to monitoring 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 |
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| CN111443472A (en) * | 2020-05-18 | 2020-07-24 | 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 |
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| CN113514942A (en) * | 2021-04-22 | 2021-10-19 | 浙江大学 | Infrared double-resolution-ratio optical imaging system |
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| CN114624896A (en) * | 2022-03-11 | 2022-06-14 | 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 |
| 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 |
| CN116047714A (en) * | 2022-12-25 | 2023-05-02 | 福建福光股份有限公司 | Laser infrared common-aperture dual-mode optical system |
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