CN108873280A - Off-axis catadioptric medium-long wave infrared system based on spherical reflector - Google Patents
Off-axis catadioptric medium-long wave infrared system based on spherical reflector Download PDFInfo
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Abstract
The invention provides an off-axis catadioptric medium-long wave infrared system based on a spherical reflector, which is characterized in that: the imaging lens system sequentially comprises a spherical reflector and a plurality of imaging compensation lens groups with diaphragms along the light propagation direction; each imaging compensation lens group with the diaphragm forms an independent imaging channel; the whole system is an off-axis system, in order to ensure that the imaging compensation lens group does not shield incident light rays, the spherical reflector has a fixed eccentricity relative to an incident optical axis, and in order to match reflected light rays, the compensation lens group is inclined to ensure that incident principal rays are vertical to the compensation lens group; the imaging compensation lens groups are distributed at the light emergent positions of the concentric sphere reflectors in a fan shape and are not on the same plane with incident light; the plurality of imaging compensation lens groups comprise a plurality of short-focus compensation lenses, a plurality of middle-focus compensation lenses and a plurality of long-focus compensation lenses, and the plurality of imaging compensation lens groups adopt compensation lens groups with different focal lengths for different fields of view to correct aberration so as to ensure constant meta-high resolution.
Description
Technical field
The present invention relates to optical imaging fields, and in particular to long wave is red in a kind of off-axis refraction-reflection type based on spherical reflector
External system.It is mainly used for spaceborne a wide range of intermediate resolution meteorological observation, it can also be used to which urban safety monitoring, is prevented territorial survey
The fields such as calamity mitigation.
Background technique
Satellite ocean remote sensing plays a significant role observation and research global ocean environment and marine resources, its main feature is that fastly
It is speed, continuous, a wide range of and multiple parameters can be observed simultaneously.The whole world has transmitted the meteorological satellite of more detection oceans, main remote sensing
Device includes visible light multispectral scanner radiometer, and feature is that sensitivity and signal-to-noise ratio are high, and scanning field of view is wide, and image deformation is small.When
Preceding satellite load is all made of fixed focal length camera and the scheme of sweep mechanism or fixed focal length polyphaser array is added to realize big view
Field imaging, causes the resolution gap of substar and peripheral field excessive, influences the result of meteorological detection.Realize the ground such as full filed
First resolution ratio, the resolution gap for reducing substar and peripheral field are of great significance for meteorological detection.
The wide visual field ocean remote sensing device SeaWiFS carried on Orbview-2 satellite, scanned using sweeping mode ±
58.3 °, the super large breadth of 2800km is realized, substar resolution ratio is 1.13km.The middle resolution carried on EOS Terra satellite
Rate imaging spectrometer MODIS scans ± 55 ° using sweeping mode, realizes the scanning breadth of 2330km, and substar resolution ratio exists
Different spectral coverages is respectively 250m, 500m and 1000m.The visible red that SSO (Sun Synchronous Orbit) running environment satellite system NPOESS is carried it is outer at
As radiation gauge VIIRS, ± 55.8 ° are scanned using sweeping mode, realizes the super large breadth of 3000km, substar resolution ratio is
390m.The MERIS carried on Envisat-1 satellite is realized using the camera array of 5 fixed focal length camera compositions to 68.5 °
Push-scanning image in visual field, realizes the imaging of 1150km breadth, and substar resolution ratio is 250m.It is carried on Sentinel-3 satellite
OLCI is realized to push-scanning image in 68.4 ° of visual fields using the camera array of 5 fixed focal length camera compositions, realizes 1150km width
Width imaging, substar resolution ratio are 300m.China first generation polar orbiting meteorological satellite series FY-1 be equipped with multichannel visible light and
Infrared scan radiancy meter (MVISR), scanning angle are ± 55.4 °, and substar resolution ratio reaches 1.1km, and peripheral field is differentiated
Rate is about 4km, and imaging breadth is about 2800km.Intermediate-resolution spectrum is equipped on second generation polar orbiting meteorological satellite series FY-3
Imager (MERSI), scanning angle are ± 55.4 °, and substar resolution ratio reaches 0.1km, and peripheral field resolution ratio is about
2.4km, imaging breadth is about 2800km.The ten wave band ocean color scanners of ocean No.1 (HY-1) Seeds of First Post-flight use sweeping mode
± 35.2 ° of scanning, substar resolution ratio are 1100m.As can be seen that the load of current weather satellite, which uses, pushes away the skill swept with sweeping
Art scheme is all based on fixed focal length image distance combination scan mechanism and realizes big visual field, low distortion imaging.Due to using fixed focal length
Camera, big visual field cause the subtended angle of imaging over the ground and image-forming range of substar and peripheral field to have a long way to go, cause substar with
The resolution gap of peripheral field is excessive.By taking the Moderate Imaging Spectroradiomete MODIS carried on EOS Terra satellite as an example,
When substar resolution ratio is 500m, the resolution ratio of peripheral field is about 2700m.
Duke Univ USA D.J.Brady etc. artificially solves big visual field, low distortion, high-resolution imaging are proposed based on same
The multiple dimensioned Optical System Design scheme of bulbus cordis lens.Full filed is divided into multiple sub- visual fields, each sub- visual field by the program
There is independent compensating glass to compensate local aberration, guarantees in single sub- visual field that image quality is good and distortion very little, multiple subsystems
The low distortion of high imaging quality in full filed is realized in splicing.Domestic more units have also applied for related patents：The space of Beijing in 2012
The patent of the applied Patent No. 103064171A of electromechanical research《A kind of novel high-resolution large-viewing-field optical imagery system
System》, the patent of the Patent No. 203838419U of the application of University Of Suzhou in 2013《For extensive high-definition remote sensing camera
Optical imaging system》, the patent of the Patent No. 204188263U of the application of University Of Suzhou in 2014《A kind of wide field staring formula light
Spectrum imaging system》, the patent of the Patent No. 104079808A of the application of Xian Electronics Science and Technology University in 2014《Ultrahigh resolution
Wide field imaging system》And the Patent No. ZL 201610265166.5 of Xi'an optical precision optical machinery research institute application in 2016
Patent《Based on the nearly multispectral optical system of hemisphere visual field constant resolution of spherical reflector Larger Dynamic range》.Though the above patent
It is so different in terms of content, but common ground is all based on the concentric multiple dimensioned design of concentric globe lens.By the low of infra-red material
The concentric Multiscale System scheme of the influence of transmissivity, transmission-type is difficult to apply to infrared band.
Summary of the invention
Demand infrared band is imaged under more and more application environments, for the big visual field of infrared band demand, low distortion, height
The demand of image quality optical system, the invention proposes LONG WAVE INFRARED systems in the off-axis refraction-reflection type based on spherical reflector.
The optical system have image quality is high, imaging viewing field is big, full filed consistently first resolution ratio, be operable with the spies such as infrared band
Point.
The technical solution of the invention is as follows provides LONG WAVE INFRARED system in a kind of off-axis refraction-reflection type based on spherical reflector
System, is characterized in that：It successively include that a spherical reflector and multiple imagings with diaphragm are mended along the light direction of propagation
Repay lens group；
Whole system is off-axis system, incident light axis, with spherical reflector and multiple imaging compensating lens with diaphragm
Group is not coaxial；
Multiple imaging compensating lens groups with diaphragm are fan-shaped to be distributed in the going out at light of spherical reflector, and be incident to
Incident light with spherical reflector in Different Plane, each imaging compensating lens group with diaphragm constitute one individually at
As channel；From the light vertical incidence that spherical reflector reflects to the imaging compensating lens group for having diaphragm；
The above-mentioned imaging compensating lens group with diaphragm includes multiple short focus compensating glass, multiple middle burnt compensating glass and multiple length
Burnt compensating glass, above-mentioned multiple imaging compensating lens groups use different visual fields the compensation microscope group aberration correction of different focal length,
To guarantee consistently first high-resolution.
It is off-axis relationship between above-mentioned same spherical reflector and each imaging compensating lens group, narrow visual field direction is coaxial view
, there are certain bias relative to zero visual field for spherical reflector, and leading to the actual use part of spherical reflector is only to deviate
The off-axis part of symmetrical centre；Due to each channel narrow visual field direction choose it is consistent, thus each channel utilizes anti-
It is identical to penetrate mirror portion centers point, all systems can be stitched together by extension spherical reflector, realize nearly hemisphere
View field imaging.
Preferably, multiple imaging compensating lens groups with diaphragm are fan-shaped is evenly arranged at the light out of spherical reflector.
Preferably, short focus compensating glass includes the first negative lens, the first positive lens, cold stop window set gradually along optical path
Mouth, the second positive lens, the second negative lens, third negative lens；The optical characteristics of above-mentioned first negative lens is：-2f'2<f’21<-f
’2,-3f’2<R21<-2f’2,-5f’2<R22<-4f’2；The optical characteristics of above-mentioned first positive lens is：2f'2<f’22<3f’2,-f’2<
R23<0,-f’2<R24<0；The optical characteristics of above-mentioned second positive lens is： 2f'2<f’23<3f’2,0<R25<f’2,f’2<R26<2f
’2；The optical characteristics of above-mentioned second negative lens is： -7f'2<f’24<-6f’2,2f’2<R27<3f’2,f’2<R28<2f’2；Above-mentioned
The optical characteristics of three negative lenses is： -f'2<f’25<-0.5f’2,-3f’2<R29<-2f’2,-R210<-6f’2；Wherein, f '2It is short
The focal length of burnt compensating glass, f '2>0, f '21、f’22、f’23、f’24、f’25It is followed successively by the coke of 5 lens of composition short focus compensating glass
Away from；R21、R22、R23、R24、 R25、R26、R27、R28、R29、R210Corresponding to 5 lens for respectively being composition short focus compensating glass
10 radius of curvature.
Preferably, middle burnt compensating glass includes the first negative lens, the first positive lens, cold stop window set gradually along optical path
Mouth, the second positive lens, the second negative lens, third negative lens；Wherein the optical characteristics of the first negative lens is：-2f'3<f’31<-f
’3, -2f '3<R31<-f’3, -3f '3<R32<-2f’3；The optical characteristics of first positive lens is： f'3<f’32<2f’3,-f '3<R33<
0 ,-f '3<R34<0；The optical characteristics of second positive lens is：f'3<f’33<2f’3, 0<R35<f’3, f '3<R36<2f’3；Second is negative
The optical characteristics of mirror is：-7f'3<f’34<-6f’3, 8f '3<R37<9f’3, 4f '3<R38<5f’3；The optical characteristics of third negative lens
For：-2f'3<f’35<-f’3, -3f '3<R39<-2f’3, R310<-10f’3；Wherein, f '3For the focal length of middle burnt compensating glass, f '3>0；
f’31、f’32、f’33、f’34、f’35It is followed successively by the focal length of 5 lens of burnt compensating glass in composition；R31、R32、R33、R34、R35、R36、
R37、R38、R39、R310It is followed successively by 10 radius of curvature corresponding to 5 lens of burnt compensating glass in composition.
Preferably, focal length compensating glass includes the first negative lens, the first positive lens, cold stop window set gradually along optical path
Mouth, the second positive lens, the second negative lens, third negative lens；Wherein the optical characteristics of the first negative lens is：-2f'4<f’41<-f
’4, -2f '4<R41<-f’4, -4f '4<R42<-3f’4；The optical characteristics of first positive lens is：2f'4<f’42<3f’4,-f '4<R43<
0 ,-f '4<R44<0；The optical characteristics of second positive lens is： f'4<f’43<2f’4, 0<R45<f’4, f '4<R46<2f’4；Second is negative
The optical characteristics of mirror is：-5f'4<f’44<-4f’4, 2f '4<R47<3f’4, 1f '4<R48<2f’4；The optical characteristics of third negative lens
For：-2f'4<f’45<-f’4, -3f '4<R49<-2f’4, R410<-7f’4；Wherein, f '4For the focal length of focal length compensating glass, f '4>0；
f’41、f’42、f’43、 f’44、f’45It is followed successively by the focal length of 5 lens of composition focal length compensating glass；R41、R42、R43、R44、R45、
R46、R47、 R48、R49、R410It is followed successively by 10 radius of curvature corresponding to composition 5 lens of focal length compensating glass.
System selection pushes away the imaging pattern swept, and the visual field in each channel is selected as narrow strips visual field, it is preferable that different
The wide visual field of imaging band covers entire imaging viewing field by overlapped 5%, and all narrow visual fields are to deviate central vision
The narrowband visual field of certain angle.Imaging compensating lens group of the whole system with diaphragm is only being arranged on direction perpendicular to pushing away to sweep.
Preferably, short focus compensating glass, middle burnt compensating glass and focal length compensating glass relative aperture having the same, guarantee each visual field
The consistency of image quality.
Preferably, the distance between spherical reflector and the imaging compensating lens group with diaphragm are optical system focal length one
Times or more, it will not be interfered with guaranteeing to arrange between enough imaging compensating lens groups and each compensation lens group.
Preferably, cold stop window includes diaphragm and the glass plate that is arranged at diaphragm, by by part-compensating lens
The mode of refrigeration realizes cold stop.
The beneficial effects of the invention are as follows：
1, the present invention is realized in entire visual field plus each compensation lens group close to diffraction limit using spherical reflector
Image quality, diaphragm setting compensation lens group inside, make full use of the optics of spherical reflector full filed rotational symmetry
Characteristic；The effective viewing field of optical system theoretically can be close to 360 °, in conjunction with push away the imaging pattern swept can obtain greatly at
Film size is wide；Within the scope of the full filed close to 360 °, the distortion of all visual fields is less than 5%；
2, be spaced and open very much between spherical reflector of the present invention and compensation lens group, can effectively separate each channel at
As light beam, be conducive to spuious Xanthophyll cycle；Interference of the local intense light source to entire field is avoided simultaneously, Larger Dynamic model may be implemented
The imaging detection enclosed；
3, present invention imaging spectral coverage covers 8-12 μm, covers common long wave infrared region；
4, in order to realize consistently first resolution ratio in different visual fields, three kinds of compensation microscope group is used for different visual fields
Aberration correction realizes short focus, middle burnt and focal length on the basis of the same globe lens to guarantee consistently first high-resolution；Simultaneously
Short, middle burnt and focal length system relative aperture F# having the same, to further ensure the consistent of each view field imaging quality
Property；
5, in conjunction with pushing away the imaging pattern swept, the imaging compensating lens group of whole system is arranged just in and sweeps direction perpendicular to pushing away
On, the quantity of camera can be significantly reduced relative to face battle array imaging；Entire spherical reflector can be cut and (be cut simultaneously
Leaving after cutting is Perimeter Truss Reflector) only retain required part, the volume and quality of the reduction camera that can be increased；
6, optics overall length long enough when short focus, middle burnt and focal length system design, it is ensured that arrange in image planes enough
Camera and each camera between will not interfere；Apart from long enough, this point between spherical reflector and compensation lens group
It is good for the veiling glare inhibition in later period；The eyeglass arrangement for forming compensation microscope group simultaneously is very close, and system is installed and is filled
It adjusts all highly beneficial；
7, in view of LONG WAVE INFRARED system is passed through frequently with refrigeration mode, in common scheme generally by the way of cold stop
It solves；But the imaging viewing field of system is limited using cold stop scheme, full filed is segmented in the present invention, each channel
Visual field it is limited, and at system stop be arranged glass plate, cold light is realized in such a way that part-compensating lens freeze
Door screen.
Detailed description of the invention
Fig. 1 is the incident optical splice schematic diagram of optical system of the present invention；
Fig. 2 is that the imaging compensating lens group of optical system of the present invention splices schematic diagram；
Fig. 3 a, Fig. 3 b and Fig. 3 c are respectively optical system of the present invention in short focus, the middle burnt and corresponding structural schematic diagram of focal length；
Fig. 4 a, Fig. 4 b are optical system of the present invention in the corresponding MTF curve of short focus；
Fig. 4 c, Fig. 4 d are optical system of the present invention in the corresponding MTF curve of middle coke；
Fig. 4 e, Fig. 4 f are optical system of the present invention in the corresponding MTF curve of focal length；
Fig. 5 a, Fig. 5 b and Fig. 5 c are respectively optical system of the present invention in short focus, middle burnt and focal length figure of optical lens preferred embodiment；
Fig. 6 a, Fig. 6 b and Fig. 6 c are respectively optical system of the present invention in short focus, middle burnt and focal length the curvature of field and distortion curve；
Fig. 7 a is optical system three dimensional structure diagram of the present invention；
Fig. 7 b is the side view of Fig. 7 a.
Appended drawing reference is in figure：1- spherical reflector；2- short focus compensating glass, burnt compensating glass, 4- focal length compensating glass in 3-；
21- short focus compensates the first negative lens of microscope group, and 22- short focus compensates the first positive lens of microscope group, and 23- short focus compensates the window of microscope group
Glass, 24- short focus compensate the second positive lens of microscope group, and 25- short focus compensates the second negative lens of microscope group, and 26- short focus compensates microscope group
Third negative lens；Coke compensates the first negative lens of microscope group in 31-, the first positive lens of burnt compensation microscope group in 32-, burnt in 33-
The window glass of microscope group is compensated, coke compensates the second positive lens of microscope group in 34-, the second negative lens of burnt compensation microscope group in 35-,
The third negative lens of burnt compensation microscope group in 36-；41- focal length compensates the first negative lens of microscope group, and 42- focal length compensates the of microscope group
One positive lens, 43- focal length compensate the window glass of microscope group, and 44- focal length compensates the second positive lens of microscope group, 45- focal length compensating glass
Second negative lens of group, 46- focal length compensate the third negative lens of microscope group；
Specific embodiment
Below in conjunction with attached drawing, the present invention will be further described.
As shown in Figure 1, Figure 2, shown in Fig. 7 a and Fig. 7 b, it is the structural schematic diagram of optical system of the present invention, is put on optical path
Set spherical reflector 1.In order to individually inhibit veiling glare to the corresponding imaging band of each compensation microscope group, and make full use of spheric reflection
The optical characteristics of 1 full filed rotational symmetry of mirror is sequentially placed according to optical design result in 1 front corresponding position of spherical reflector
Each imaging compensating microscope group；The imaging beam of each imaging band avoids local intense light source to entire field by effectively separated
Interference, the imaging detection of Larger Dynamic range may be implemented.In conjunction with pushing away the imaging pattern swept, the imaging compensating lens of whole system
Group is arranged just in and sweeps on direction perpendicular to pushing away, and the quantity of camera can be significantly reduced relative to face battle array imaging；It simultaneously can be right
Entire globe lens, which is cut, only retains required part, can greatly reduce the volume and quality of camera.
Imaging compensating lens group system includes short focus compensating glass 2, middle burnt compensating glass 3 and focal length compensating glass 4；Such as Fig. 3 a, figure
Optical system of the present invention is individually given shown in 3b and Fig. 3 c in short focus, the middle burnt and corresponding structural schematic diagram of focal length.
Wherein, short focus compensating glass is made of 6 lens, is followed successively by along optical path：Short focus compensates the first negative lens 21 of microscope group,
Short focus compensates the first positive lens 22 of microscope group, and short focus compensates the window glass 23 of microscope group, and short focus compensates the second positive lens of microscope group
24, short focus compensates the second negative lens 25 of microscope group, and short focus compensates the third negative lens 26 of microscope group；The optics of above-mentioned first negative lens
Characteristic is：-2f'2<f’21<-f’2,-3f’2<R21<-2f’2, -5f’2<R22<-4f’2；The optical characteristics of above-mentioned first positive lens
For：2f'2<f’22<3f’2,-f’2<R23<0, -f’2<R24<0；The optical characteristics of above-mentioned second positive lens is：2f'2<f’23<3f
’2,0<R25<f’2,f’2<R26<2f’2；The optical characteristics of above-mentioned second negative lens is：-7f'2<f’24<-6f’2,2f’2<R27<
3f’2,f’2<R28<2f’2；The optical characteristics of above-mentioned third negative lens is：-f'2<f’25<-0.5f’2,-3f’2<R29<-2f’2,-
R210<-6f’2；Wherein, f '2For the focal length of short focus system, f '2>0, f '21、f’22、f’23、f’24、f’25Composition short focus is followed successively by mend
Repay the focal length of 5 lens of mirror；R21、R22、R23、R24、R25、R26、R27、R28、R29、R210It is followed successively by 10 corresponding to 5 lens
A radius of curvature.
Middle coke compensating glass is made of 6 lens, and the first negative lens 31 of middle burnt compensation microscope group, middle burnt benefit are followed successively by along optical path
Repay the first positive lens 32 of microscope group, the window glass 33 of middle burnt compensation microscope group, the second positive lens 34 of middle burnt compensation microscope group, middle coke
Compensate the second negative lens 35 of microscope group, the third negative lens 36 of middle burnt compensation microscope group；The wherein optical characteristics of the first negative lens
For：-2f'3<f’31<-f’3, -2f '3<R31<-f’3, -3f '3<R32<-2f’3；The optical characteristics of first positive lens is：f'3<f’32<
2f’3,-f '3<R33<0 ,-f '3<R34<0；The optical characteristics of second positive lens is：f'3<f’33<2f’3, 0<R35<f’3, f '3<R36<
2f’3；The optical characteristics of second negative lens is： -7f'3<f’34<-6f’3, 8f '3<R37<9f’3, 4f '3<R38<5f’3；Third is negative
The optical characteristics of lens is： -2f'3<f’35<-f’3, -3f '3<R39<-2f’3, R310<-10f’3；Wherein, f '3For middle burnt system
Focal length, f '3>0； f'31、f’32、f’33、f’34、f’35It is followed successively by the focal length of 5 lens of burnt compensating glass in composition；R31、R32、
R33、R34、 R35、R36、R37、R38、R39、R310It is followed successively by 10 radius of curvature corresponding to 5 lens.
Above-mentioned focal length compensating glass is made of 6 lens, is followed successively by along optical path：Focal length compensates the first negative lens 41 of microscope group,
Focal length compensates the first positive lens 42 of microscope group, and focal length compensates the window glass 43 of microscope group, and focal length compensates the second positive lens of microscope group
44, focal length compensates the second negative lens 45 of microscope group, and focal length compensates the third negative lens 46 of microscope group；The wherein optics of the first negative lens
Characteristic is：-2f'4<f’41<-f’4, -2f '4<R41<-f’4, -4f '4<R42<-3f’4；The optical characteristics of first positive lens is：
2f’4<f’42<3f’4,-f '4<R43<0 ,-f '4<R44<0；The optical characteristics of second positive lens is：f'4<f’43<2f’4, 0<R45<f
’4, f '4<R46<2f’4；The optical characteristics of second negative lens is：-5f'4<f’44<-4f’4, 2f '4<R47<3f’4, 1f '4<R48<2f
’4；The optical characteristics of third negative lens is：-2f'4<f’45<-f’4, -3f '4<R49<-2f’4, R410<-7f’4；Wherein, f '4For length
The focal length of burnt compensating glass, f '4>0；f'41、f’42、f’43、f’44、f’45It is followed successively by the focal length of 5 lens of composition focal length compensating glass；
R41、R42、R43、R44、R45、R46、R47、R48、R49、R410It is followed successively by 10 radius of curvature corresponding to 5 lens.
The system focal length short focus of optical system provided by the present embodiment, middle burnt and focal length be followed successively by 59.04mm,
65.51mm and 90mm；The corresponding full filed of different focal length is followed successively by 22.12 °, 20 ° and 16 °, corresponding detector pixel
Size is respectively 75 μm, 50 μm, 25 μm, and 110 ° of full filed is realized by splicing；Short focus, middle burnt and focal length system F# are
2, full filed is without vignetting.Such as Fig. 4 a, Fig. 4 b, Fig. 4 c, Fig. 4 d, Fig. 4 e, Fig. 4 f, Fig. 5 a, Fig. 5 b, Fig. 5 c, Fig. 6 a, Fig. 6 b and figure
Shown in 6c, MTF is close to diffraction limit within the scope of full filed in 8 μm of -12 μm of wavelength bands, and relative distortion is less than 5%, phase
Within 5 μm of deviation of disc of confusion energy mass center of central wavelength (10 μm).If by the camera applications in the LEO of 800km
On satellite, can be obtained in 110 ° of field ranges consistently first resolution ratio better than 1200m close to diffraction limit at image quality
Amount.
Optical system is using pushing away the mode swept, so image camera only needs to be distributed in perpendicular to pushing away on the direction swept, it is right
It can be cut away in extra spherical reflector part, can greatly reduce the complexity of optical system in this way, while
Conducive to the small light for realizing camera.
Orbital flight height may be implemented in same F# and visual field by carrying out equal proportion scaling to the embodiment
Degree is less than in the case of 800km, the image quality close to diffraction limit is being realized close in 180 ° of visual fields, and can regard at 110 °
There is consistently first resolution ratio in the range of field.
Claims (9)
1. LONG WAVE INFRARED system in a kind of off-axis refraction-reflection type based on spherical reflector, it is characterised in that：Along the light direction of propagation
It successively include one with spherical reflector and multiple imaging compensating lens groups with diaphragm；
It is incident light axis, not coaxial with spherical reflector and multiple imaging compensating lens groups with diaphragm；
Multiple imaging compensating lens groups with diaphragm are fan-shaped to be distributed at the light out of same spherical reflector, and same with being incident to
For the incident light of spherical reflector in Different Plane, each imaging compensating lens group with diaphragm constitutes an individually imaging
Channel；The light vertical incidence reflected from same spherical reflector to have diaphragm imaging compensating lens group；
The imaging compensating lens group with diaphragm includes that multiple short focus compensating glass, multiple middle burnt compensating glass and multiple focal length are mended
Repay mirror.
2. LONG WAVE INFRARED system in a kind of off-axis refraction-reflection type based on spherical reflector according to claim 1, feature
It is：Multiple imaging compensating lens groups with diaphragm are fan-shaped to be evenly arranged at the light out of same spherical reflector.
3. LONG WAVE INFRARED system in a kind of off-axis refraction-reflection type based on spherical reflector according to claim 2, feature
It is：Short focus compensating glass includes that the first negative lens set gradually along optical path, the first positive lens, cold stop window, second are just saturating
Mirror, the second negative lens, third negative lens；The optical characteristics of first negative lens is：-2f'2<f’21<-f’2,-3f’2<R21<-
2f’2,-5f’2<R22<-4f’2；The optical characteristics of first positive lens is：2f'2<f’22<3f’2,-f’2<R23<0,-f’2<R24
<0；The optical characteristics of second positive lens is：2f'2<f’23<3f’2,0<R25<f’2,f’2<R26<2f’2；Described second is negative
The optical characteristics of mirror is：-7f'2<f’24<-6f’2,2f’2<R27<3f’2,f’2<R28<2f’2；The optics of the third negative lens is special
Property is：-f'2<f’25<-0.5f’2,-3f’2<R29<-2f’2,-R210<-6f’2；Wherein, f '2For the focal length of short focus compensating glass, f '2>
0, f '21、f’22、f’23、f’24、f’25It is followed successively by the focal length of 5 lens of composition short focus compensating glass；R21、R22、R23、R24、R25、
R26、R27、R28、R29、R210It respectively is 10 radius of curvature corresponding to 5 lens of composition short focus compensating glass.
4. LONG WAVE INFRARED system in a kind of off-axis refraction-reflection type based on spherical reflector according to claim 2, feature
It is：Middle coke compensating glass includes that the first negative lens set gradually along optical path, the first positive lens, cold stop window, second are just saturating
Mirror, the second negative lens, third negative lens；Wherein the optical characteristics of the first negative lens is：-2f'3<f’31<-f’3, -2f '3<R31<-
f’3, -3f '3<R32<-2f’3；The optical characteristics of first positive lens is：f'3<f’32<2f’3,-f '3<R33<0 ,-f '3<R34<0；The
The optical characteristics of two positive lens is：f'3<f’33<2f’3, 0<R35<f’3, f '3<R36<2f’3；The optical characteristics of second negative lens
For：-7f'3<f’34<-6f’3, 8f '3<R37<9f’3, 4f '3<R38<5f’3；The optical characteristics of third negative lens is：-2f'3<f’35
<-f’3, -3f '3<R39<-2f’3, R310<-10f’3；Wherein, f '3For the focal length of middle burnt compensating glass, f '3>0；f'31、f’32、f’33、
f’34、f’35It is followed successively by the focal length of 5 lens of burnt compensating glass in composition；R31、R32、R33、R34、R35、R36、R37、R38、R39、R310
It is followed successively by 10 radius of curvature corresponding to 5 lens of burnt compensating glass in composition.
5. LONG WAVE INFRARED system in a kind of off-axis refraction-reflection type based on spherical reflector according to claim 2, feature
It is：Focal length compensating glass includes that the first negative lens set gradually along optical path, the first positive lens, cold stop window, second are just saturating
Mirror, the second negative lens, third negative lens；Wherein the optical characteristics of the first negative lens is：-2f'4<f’41<-f’4, -2f '4<R41<-
f’4, -4f '4<R42<-3f’4；The optical characteristics of first positive lens is：2f'4<f’42<3f’4,-f '4<R43<0 ,-f '4<R44<0；The
The optical characteristics of two positive lens is：f'4<f’43<2f’4, 0<R45<f’4, f '4<R46<2f’4；The optical characteristics of second negative lens
For：-5f'4<f’44<-4f’4, 2f '4<R47<3f’4, 1f '4<R48<2f’4；The optical characteristics of third negative lens is：-2f'4<f’45
<-f’4, -3f '4<R49<-2f’4, R410<-7f’4；Wherein, f '4For the focal length of focal length compensating glass, f '4>0；f'41、f’42、f’43、
f’44、f’45It is followed successively by the focal length of 5 lens of composition focal length compensating glass；R41、R42、R43、R44、R45、R46、R47、R48、R49、R410
It is followed successively by 10 radius of curvature corresponding to composition 5 lens of focal length compensating glass.
6. LONG WAVE INFRARED system in a kind of off-axis refraction-reflection type based on spherical reflector according to claim 2, feature
It is：System selection pushes away the imaging pattern swept, and the visual field of each imaging band is selected as narrow strips visual field, and difference imaging is logical
The wide visual field in road covers entire imaging viewing field by overlapped 5%, and all narrow visual fields are to deviate the certain angle of central vision
The narrowband visual field of degree, the imaging compensating lens group of whole system are only being arranged on direction perpendicular to pushing away to sweep.
7. LONG WAVE INFRARED system in a kind of off-axis refraction-reflection type based on spherical reflector according to any one of claims 1 to 5,
It is characterized in that：Short focus compensating glass, middle burnt compensating glass and focal length compensating glass relative aperture having the same.
8. LONG WAVE INFRARED system in a kind of off-axis refraction-reflection type based on spherical reflector according to any one of claims 1 to 5,
It is characterized in that：The distance between spherical reflector and imaging compensating lens group with diaphragm for optical system focal length one again with
On.
9. according to LONG WAVE INFRARED system in a kind of any off-axis refraction-reflection type based on spherical reflector of claim 3 to 5,
It is characterized in that：Cold stop window includes diaphragm and the glass plate that is arranged at diaphragm.
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