CN2711758Y - Refraction/reflection infrared optical system for push-scan imaging - Google Patents
Refraction/reflection infrared optical system for push-scan imaging Download PDFInfo
- Publication number
- CN2711758Y CN2711758Y CN 200420036624 CN200420036624U CN2711758Y CN 2711758 Y CN2711758 Y CN 2711758Y CN 200420036624 CN200420036624 CN 200420036624 CN 200420036624 U CN200420036624 U CN 200420036624U CN 2711758 Y CN2711758 Y CN 2711758Y
- Authority
- CN
- China
- Prior art keywords
- optical system
- lens
- push
- mirror
- infrared optical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Lenses (AREA)
Abstract
The utility model discloses a refraction/reflection infrared optical system for push-scan imaging, comprising a reflection type telescopic system with two mirrors and an anaberrational lens assembly. The entire optical system is positioned at the same optic axis. The utility model has the advantages that preparation and corrected technique are matured; structure is compact and reasonable, and stability and reliability of the system are high; the refraction/reflection infrared optical system can realize large caliber and wide angular field imaging and can design and develop a corresponding optical system according to different service bands.
Description
Technical field
The utility model relates to optical element, system, specifically is meant a kind of catadioptric infrared optical system that is used for push-scan imaging.
Background technology
Push-scan imaging is to adopt the self-scanning of detector array and the motion realization two-dimensional scan imaging over the ground of platform.Compare with traditional mechanical scanning mode, the different photosensitive unit that pushes away the detector that the mode of sweeping launched by column direction along the line at the image acquisition of vertical platform orbital direction finishes simultaneously, so just making the pixel residence time can reach substar passes by time of a pixel, thereby improved system sensitivity and reliability effectively, simplified system architecture.
For push-scanning image on a large scale, can only form long alignment by adopting abundant unit component, guarantee desired resolution of instrument real work and fabric width.Therefore, push-scan imaging itself has determined that its optical system must be a big visual field system; For energy that guarantees incoming signal and the restriction that is subjected to optical diffraction limit, infrared optical system must be the heavy caliber system; Simultaneously, because the unit yardstick of long detector array is less, require the optical system focal length short, the F number is little.In addition, the volume and weight of optical system also will be subjected to the strictness restriction of satellite platform.So the infrared optical system that is used for push-scan imaging has great difficulty from reasonable selection to finishing Design and Machining.
At present, the thermal infrared pull-broom type scanner (TIRI) that Europe is used for earth observation has adopted from the axle catadioptric and has mixed infrared optical system, and Russian dual-band infrared pushes away to be swept camera and adopted the rotating shaft catadioptric to mix infrared optical system.For from axle, rotating shaft optical system, because its structure is complicated, increased the difficulty of processing and correction, reduced the stability and the reliability of system simultaneously.
Summary of the invention
Based on some problems that above-mentioned prior art exists, the purpose of this utility model is that proposition is a kind of simple in structure, and the dress school is catadioptric infrared telescope optical system easily, and scioptics group disappearing image difference realizes wide visual field, bigbore optical imagery again.
Catadioptric infrared optical system of the present utility model as shown in Figure 1, optical system is made up of a secondary mirror 1, a principal reflection mirror 2 and a disappearing image aplanat group 3 to the side of elephant in order from object space.Light beam directive principal reflection mirror 2 from object space reflexes to secondary mirror 1 through it, again by secondary mirror 1 reflection to the side of elephant, successively by first lens 301, second lens 302 in the disappearing image aplanat group 3, the side of elephant as plane 4 on imaging.The optical element of whole optical system is positioned on the same optical axis.
Said secondary mirror 1 is that convex reflector, principal reflection mirror 2 are recessed catoptron, and their curved surface is the standard quadric surface, i.e. hyperboloid.
Said anaberration lens combination 3 is used for proofreading and correct the remaining aberration after light beam passes through principal reflection mirror 2 and secondary mirror 1, and it is made up of two lens, and wherein first lens 301 and second lens 302 are spherical lens,
The native system structure can realize the infrared optics imaging of 3.5 ° of visual fields, 25～30 μ rad angular resolutions, F several 2.5.
The utility model has the advantages that:
1. the coaxial optical system structure is relatively from axle, rotating shaft system, and the technology of preparing maturation has improved stability, the reliability of system greatly, has reduced processing, has proofreaied and correct difficulty.
2. the coaxial system compact conformation is reasonable, and volume is little, can effectively reduce the pressure to satellite platform.
3. the bore of reflective two mirror telescopic systems can be done more much biggerly than lens, thereby has realized the requirement of heavy caliber system.
Description of drawings
Fig. 1 is a catadioptric infrared optical system structural representation of the present utility model,
Among the figure: t1 is the interval of principal reflection mirror 2 and secondary mirror 1;
T2 is the interval of secondary mirror 1 and lens combination 3;
D1 is that center thickness, the d2 of first lens 301 is the center thickness of second lens 302;
T3 is the interval between first lens 301 and second lens 302;
T4 is the distance between second lens 302 and the image planes.
Embodiment
According to the optical system structure of Fig. 1, we have designed the optical system that is operated in short-wave infrared 3～5 mu m wavebands.Systematic technical indicator is as follows: optics entrance pupil bore Ф 300mm, spatial resolution 25～30 μ rad, 3.5 ° of field angle, F several 2.5.Optical system specific design parameter is as shown in table 1.
Table 1
Interval, title radius-of-curvature asphericity coefficient aperture or thickness (mm) material
(mm) (e
2) (mm)
Principal reflection mirror-796.63 1.2066 300 250 (t1)
Secondary mirror-566.56 11.6553 130 255 (t2)
First lens (R1) 121.61 65 10 (d1) germanium
301 (R2)75.10 65 5(t3)
Second lens (R1) 119.14 65 10 (d2) germanium
302 (R2)275.20 65 39.83(t4)
Image planes 48
Claims (2)
1. a catadioptric infrared optical system that is used for push-scan imaging comprises principal reflection mirror (2), secondary mirror (1) and an achromatic correction mirror group (3), it is characterized in that:
A). optical system is made up of a secondary mirror (1), a principal reflection mirror (2) and a disappearing image aplanat group (3) to the side of elephant in order from object space;
B). the optical element of whole optical system is positioned on the same optical axis;
C). from the light beam directive principal reflection mirror (2) of object space, reflex to secondary mirror (1) through it, reflect to the side of elephant by secondary mirror (1) again,, go up imaging as plane (4) in the side of elephant successively by first lens (301), second lens (302) in the disappearing image aplanat group (3);
2. according to a kind of catadioptric infrared optical system that is used for push-scan imaging of claim 1, it is characterized in that:
A). said secondary mirror (1) is that convex reflector, principal reflection mirror (2) they are recessed catoptron, and their curved surface is the standard quadric surface, i.e. hyperboloid;
B). said disappearing image aplanat group (3) is made up of first lens (301) and second lens (302), and is spherical lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420036624 CN2711758Y (en) | 2004-06-22 | 2004-06-22 | Refraction/reflection infrared optical system for push-scan imaging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420036624 CN2711758Y (en) | 2004-06-22 | 2004-06-22 | Refraction/reflection infrared optical system for push-scan imaging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2711758Y true CN2711758Y (en) | 2005-07-20 |
Family
ID=36192863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420036624 Expired - Fee Related CN2711758Y (en) | 2004-06-22 | 2004-06-22 | Refraction/reflection infrared optical system for push-scan imaging |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2711758Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101634744B (en) * | 2009-08-06 | 2010-09-29 | 哈尔滨工业大学 | Foldback-type bi-spectral gaze imaging system |
| CN106526821A (en) * | 2016-11-30 | 2017-03-22 | 长光卫星技术有限公司 | Dual-mode space remote-sensing camera based on field-of-view light-splitting optical system |
| CN107807441A (en) * | 2017-11-22 | 2018-03-16 | 中国科学院长春光学精密机械与物理研究所 | catadioptric optical imaging system |
-
2004
- 2004-06-22 CN CN 200420036624 patent/CN2711758Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101634744B (en) * | 2009-08-06 | 2010-09-29 | 哈尔滨工业大学 | Foldback-type bi-spectral gaze imaging system |
| CN106526821A (en) * | 2016-11-30 | 2017-03-22 | 长光卫星技术有限公司 | Dual-mode space remote-sensing camera based on field-of-view light-splitting optical system |
| CN107807441A (en) * | 2017-11-22 | 2018-03-16 | 中国科学院长春光学精密机械与物理研究所 | catadioptric optical imaging system |
| CN107807441B (en) * | 2017-11-22 | 2018-08-17 | 中国科学院长春光学精密机械与物理研究所 | catadioptric optical imaging system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100504495C (en) | Relay scanning imaging optical system of space large caliber compression light beam | |
| US4964706A (en) | Multi-focal length, multi-field of view three mirror anastrigmat | |
| US5363235A (en) | Dual field of view multi wavelength sensor | |
| US6333811B1 (en) | All-reflective zoom optical imaging system | |
| US4900914A (en) | Wide-angle viewing window with a plurality of optical structures | |
| US20030081952A1 (en) | Method and apparatus for omnidirectional three dimensional imaging | |
| US5768040A (en) | Wide field-of-view imaging spectrometer | |
| EP2439574B1 (en) | An anamorphic reflecting optical system | |
| CN110989152A (en) | Common-path flexible off-axis four-inverse focal length optical system | |
| CN101050979A (en) | Light path structure of full reflective high resolution large visual field fourier transform imaging spectrograph | |
| CN107703643A (en) | A kind of high-resolution multiband optics complex imaging detection system and its method | |
| JPH06317755A (en) | Wide-field total-reflecting multiple- field telescope | |
| CN102736237A (en) | Optical system for space astronomical observation infra-red telescope | |
| CN101256275A (en) | Microminiaturization co-image face panoramic imagery technique | |
| CN115509021A (en) | Optical splicing system with optical wedge and imaging lens integrally designed | |
| CN106125280B (en) | Zigzag type optical system for field stitching | |
| CN1140828C (en) | Astigmatism-eliminating three-reflector optical system | |
| CN2711758Y (en) | Refraction/reflection infrared optical system for push-scan imaging | |
| JP2598528B2 (en) | Continuously variable focus total reflection optical system | |
| CN115655470B (en) | Space sun-facing imaging spectrometer | |
| US20180343396A1 (en) | Reflective truncated ball imaging system | |
| CN1191461C (en) | Optical imaging system with refraction-reflection convex raster | |
| CN213482563U (en) | Three aperture imaging system ray apparatus structures | |
| CN105473984A (en) | System architecture for a constant footprint, constant GSD, constant spatial resolution line scanner | |
| CN201107407Y (en) | Space large caliber compressing light beam relay scanning image optical system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |