CN106125280B - Zigzag type optical system for field stitching - Google Patents
Zigzag type optical system for field stitching Download PDFInfo
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- CN106125280B CN106125280B CN201610688757.3A CN201610688757A CN106125280B CN 106125280 B CN106125280 B CN 106125280B CN 201610688757 A CN201610688757 A CN 201610688757A CN 106125280 B CN106125280 B CN 106125280B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/08—Catadioptric systems
- G02B17/0852—Catadioptric systems having a field corrector only
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/08—Catadioptric systems
Abstract
The present invention relates to remote sensing fields, a kind of Zigzag type optical system for field stitching is disclosed, the optical system includes: cylindricality splicing optical window, plane of scanning motion reflecting mirror, planar annular reflecting mirror, concave surface principal reflection mirror, rhombic prism and image rotation microscope group；Wherein, the center of planar annular reflecting mirror is equipped with through-hole, the triple reflection that the light for splicing optical window into cylindricality is successively scanned plane mirror, planar annular reflecting mirror and concave surface principal reflection mirror forms light of turning back, light of turning back is imaged at rhombic prism by the through-hole, and rhombic prism carries out visual field segmentation to imaging and is sent into the progress image reception of image rotation microscope group.Optical system of the invention solves the problems such as heavy caliber optical window difficulty of processing is big, large scale sensor process is difficult and somewhat expensive using the method for optical field of view splicing, can be widely used for infrared early warning platform.
Description
Technical field
The present invention relates to be used for remote sensing field, specifically a kind of Zigzag type optics for field stitching
System.
Background technique
With the development of remote sensing satellite application technology, big visual field, High Resolution Space Camera have become development trend, mesh
The big view field image acquisition mode relatively mostly used in preceding remote sensing equipment are as follows: carry out infra-red radiation using heavy caliber infrared window
Detection；Image reception is carried out using large-size images sensor；Using the field stitching method of mechanical splice, i.e., using mechanical dress
It sets and is closely spaced multi-disc imaging sensor in image planes.
Current big visual field remote sensing satellite camera is all made of above scheme substantially and obtains high-resolution big view field image.Its
In, the advantages of mechanical splice, is that the optical system of the camera using mechanical splice is relatively simple, it is easy to accomplish.
But existing remote sensing also exists simultaneously some obvious disadvantages, is embodied in the following:
1, it is limited by processing technology and cost, heavy caliber infrared window can not be done too big, i.e., what is detected every time is red
External radiation amount is limited；
2, the size for being limited imaging sensor by technique can not be made very big, i.e. the received image resolution ratio of single
It is limited；Preceding two o'clock limitation causes existing high-resolution big view field image that must realize by connecting method；
3, still, current mechanical splice mode is there is also problems, is difficult to control such as image quality to most typically, warp
It is commonly present the flaw of splicing seams；In addition the cost of mechanical splice device is also typically more expensive.
Summary of the invention
In view of the above drawbacks of the prior art, the technical problem to be solved by the present invention is to how realize convenient and high quality
Big view field image splicing.
In order to solve the above technical problems, the present invention provides a kind of Zigzag type optical system for field stitching, it is described
Optical system includes:
Cylindricality is spliced optical window, plane of scanning motion reflecting mirror, planar annular reflecting mirror, concave surface principal reflection mirror, rhombic prism and is turned
As microscope group；Wherein,
The center of the planar annular reflecting mirror is equipped with through-hole, and the light into cylindricality splicing optical window successively passes through institute
The triple reflection for stating plane of scanning motion reflecting mirror, the planar annular reflecting mirror and the concave surface principal reflection mirror forms light of turning back, institute
It states light of turning back to be imaged at the rhombic prism by the through-hole, the rhombic prism carries out visual field segmentation to imaging and is sent into
The image rotation microscope group carries out image reception.
Further, in the optical system:
The plane of scanning motion reflecting mirror is arranged in the inside of the cylindricality splicing optical window, splices optical window with the cylindricality is entered
Light be in 45 degree of angles；
The planar annular reflecting mirror is vertical with the plane of scanning motion reflecting mirror, and the center of area line of two plane mirrors with
First reflected light is parallel；
The central axis of the concave surface principal reflection mirror by the center of area of the planar annular reflecting mirror and with two plane mirrors
Center of area line it is vertical.
Further, in the system:
Imaging after the light inlet field of view of receiver segmentation of the image rotation microscope group, light-emitting window connect infrared detector.
Further, in the system:
The image rotation microscope group has multiple.
Further, the number of the image rotation microscope group is identical as the visual field segmentation number that the rhombic prism is realized.
Further, each imaging that multiple image transferring lens groups receive after the visual field segmentation respectively carries out image spelling again
It connects.
Further, the image rotation microscope group includes aberration correction microscope group and optical beam transformation microscope group.
Further, the image rotation microscope group is made of multiple lens.
Further, the concave surface principal reflection mirror is a spherical reflector.
Further, the rhombic prism is arranged at an image planes.
The present invention provides a kind of Zigzag type optical systems for field stitching, and which solve following problems:
1, meet system using splicing optical window and carry out remote, comprehensive fast search, and solve super large caliber light
Window difficulty not easy to be processed；
2, using muti-piece as sensor reception, then the image that imaging sensor receives is subjected to splicing and can be obtained by greatly
The image of visual field solves the problems, such as that the dimension process by sensor is limited；
3, it reuses prism and carries out visual field segmentation, visual field is divided into different spatial positions, with muti-piece as sensor
It receives, then the image that imaging sensor is received splices, and solves the problems, such as splicing seams, involves great expense.
Detailed description of the invention
Fig. 1 is the Zigzag type optical system structure schematic diagram that field stitching is used in one embodiment of the present of invention；
Fig. 2 is the modulation transfer function curve synoptic diagram in the present invention for the Zigzag type optical system of field stitching.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description.Obviously, described embodiment is to implement better embodiment of the invention, and the description is to illustrate the present invention
Rule for the purpose of, the range that is not intended to limit the invention.Protection scope of the present invention should be with claim institute circle
Subject to the person of determining, based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, shall fall within the protection scope of the present invention.
It in view of the drawbacks of the prior art, can be with the present invention provides a kind of Zigzag type optical system for field stitching
Realize remote, big visual field, comprehensive quick track-while-scan.Specifically, referring to Fig. 1, in one embodiment of the invention,
Zigzag type optical system for field stitching includes: cylindricality splicing optical window 1, plane of scanning motion reflecting mirror 2, planar annular reflecting mirror
3, concave surface principal reflection mirror 4, rhombic prism 5 and image rotation microscope group 6；Wherein, the center of planar annular reflecting mirror 3 is equipped with through-hole, enters
The light (infra-red radiation) of cylindricality splicing optical window 1 is successively scanned plane mirror 2, planar annular reflecting mirror 3 and concave surface master
The triple reflection of reflecting mirror 4 forms light of turning back, and light of turning back is imaged at rhombic prism 5 by the through-hole, 5 pairs of rhombic prism imagings
Carry out visual field segmentation and be respectively fed to image rotation microscope group 6 to complete image reception and splicing.
Wherein, the cylindricality splicing optical window 1 in Fig. 1 is spliced by multi-disc cylindricality plane window, solves super large caliber
Optical window material expensive, it is not easy to be processed the problems such as.Super large caliber optical window is obtained by the method for splicing, and rotates integrally column
Shape splices optical window 1 to obtain infra-red radiation as much as possible from each orientation, to realize infrared acquisition field medium and long distance, Quan Fang
The technical problems such as position search.As relevant technical staff in the field it is also to be understood that selecting other controllable costs and mouth big as far as possible
Same purpose also may be implemented in the optical window of diameter, therefore equally can choose the splicing optical window of other shapes here, herein
Cylindricality splices optical window 1 not as limitation of the invention.
Plane of scanning motion reflecting mirror 2 is arranged in the inside of cylindricality splicing optical window 1, is in 45 degree of angles with incident infra-red radiation.Enter
The infra-red radiation penetrated folds 90 degree through 2 reflection optical axis of plane of scanning motion reflecting mirror, while realizing that a wide range of optical axis is slightly directed toward.Annular flat
Face reflecting mirror 3 is vertical with plane of scanning motion reflecting mirror 2, and the center of area line of two plane mirrors is parallel with first reflected light.Slightly refer to
To light (first reflected light) using the reflection of planar annular reflecting mirror 3, optical axis carries out 90 degree of foldings again.Concave surface principal reflection
The central axis of mirror 4 passes through the center of area of planar annular reflecting mirror 3 and vertical with the center of area line of two plane mirrors.Through two secondary reflections
Light again through 4 third secondary reflection of concave surface principal reflection mirror, 180 degree folds optical axis again, while reducing beam cross section, opens light
Begin to assemble.Concave surface principal reflection mirror 4 is a spherical reflector, guarantees that the spherical aberration of any point in an image planes is identical.
Further, planar annular reflecting mirror 3 is provided centrally with a through-hole, and converging light after triple reflection was by should
Through-hole starts to be imaged.Rhombic prism 5 is arranged at an image planes, i.e. the focal plane of concave surface principal reflection mirror, apart from concave surface principal reflection
The vertex R/2 of mirror, R are the radius of curvature of concave surface principal reflection mirror.5 pairs of imagings progress visual field segmentations of rhombic prism (such as can be by light
Road is divided into symmetrical two-way), while realizing the transverse shifting of optical axis, the optical axis direction after movement does not change.
Image rotation microscope group 6 is made of multiple lens, the imaging after the light inlet field of view of receiver segmentation of image rotation microscope group 6, light-emitting window
It connects infrared detector (imaging sensor) and obtains image.The image of big visual field is obtained to realize, is solved by size sensor work
The problem of skill limits, is first split visual field with rhombic prism 5, is divided into different positions, then uses multiple turns
It is received as microscope group 6 is respectively fed to muti-piece imaging sensor, then the image that muti-piece imaging sensor receives is spliced.
Wherein, image rotation microscope group 6 further comprises aberration correction microscope group and optical beam transformation microscope group, and aberration correction microscope group is to secondary
Imaging position is adjusted with aberration correction, and optical beam transformation microscope group realizes pupil matching.It can as relevant technical staff in the field
To understand, image rotation microscope group can be formed using the combination of different lens herein, herein not as limitation of the present invention.
Correspondingly, using the primary complete image acquisition procedures of above-mentioned Zigzag type optical system are as follows:
1. infra-red radiation carries out big visual field, remote, comprehensive fast search through cylindricality splicing optical window 1；
2. reflection of the incident IR radiation through plane of scanning motion reflecting mirror 2 realizes that a wide range of optical axis is slightly directed toward；
3. first reflected light carries out 90 degree of foldings through 3 secondary reflection of stationary annular plane mirror, optical axis again；
4. secondary reflection light reflects through concave surface principal reflection mirror 4 and reduce beam cross section, optical axis 180 degree is folded, through ring after
The through-hole imaging of 3 center of shape plane mirror setting, arrival are arranged in 5 at the rhombic prism at an image planes；
5. carrying out visual field segmentation with rhombic prism 5 at an image planes, while the transverse shifting of optical axis is realized, after mobile
Optical axis direction does not change；
6. image rotation microscope group 6 carries out aberration correction pupil matching, detector focal plane is reached.
The image of big visual field is obtained to realize, solves the problems, such as to be limited by size sensor technique, uses diamond shape rib first
Mirror 5 is split visual field, is divided into different positions, is then received using muti-piece sensor, then imaging sensor is received
To image spliced.
Fig. 2 is the optical-modulation transfer function curve graph of optical system embodiment of the present invention.Modulation transfer function indicates to adjust
Relationship in system and image between every millimeter of demand pairs is most comprehensive criterion in all Performance of Optical System judgements, especially
It is for imaging system.In infrared optical system, modulation transmitting letter of the system at Nyquist space frequency is generally required
Numerical value >=0.3 or 0.4, by taking infrared detector picture dot size 25um as an example, then system can be differentiated maximum spatial frequency are as follows:
20lp/mm.It can be seen from the figure that at spatial frequency 20lp/mm, modulating transfer function value of the system within the scope of full filed
Greater than 0.45, show that optical system imaging quality is good, meet the utilization standard of optical instrument, is i.e. this Optical System Design closes
Reason, can use in practice.
The present invention has supplied a kind of Zigzag type optical system for field stitching, to solve big visual field, remote, Quan Fang
The problem of fast search of position, the compactedness of system are taken into account meets system using cylindricality splicing optical window first and carries out at a distance, entirely
The search in orientation, and solve super large caliber optics optical window difficulty not easy to be processed, secondly, concave surface principal reflection mirror and planar annular
Reflecting mirror is overlapped, and ensure that image planes carry out the condition of optical segmentation, and rhombic prism segmentation visual field realizes the cross of optical axis simultaneously again
To movement, the optical axis direction after movement does not change, and the optical path rotation and the interference of stationary mirror after avoiding segmentation are asked
Topic, can be widely applied to infrared early warning platform.
Although combining preferred embodiment above, invention has been described, it should be appreciated by those skilled in the art,
Method and system of the present invention is not limited to embodiment described in specific embodiment, wants without departing substantially from by appended right
Ask book limit spirit and scope of the invention in the case where, can to the present invention various modification can be adapted, increase and replacement.
Claims (8)
1. a kind of Zigzag type optical system for field stitching, which is characterized in that the optical system includes:
Cylindricality splices optical window, plane of scanning motion reflecting mirror, planar annular reflecting mirror, concave surface principal reflection mirror, rhombic prism and image transferring lens
Group；Wherein,
The center of the planar annular reflecting mirror be equipped with through-hole, into the cylindricality splicing optical window light successively pass through described in sweep
The triple reflection for retouching plane mirror, the planar annular reflecting mirror and the concave surface principal reflection mirror forms light of turning back, the folding
It returns light to be imaged at the rhombic prism by the through-hole, the rhombic prism carries out described in visual field segmentation and feeding imaging
Image rotation microscope group carries out image reception；
The plane of scanning motion reflecting mirror is arranged in the inside of the cylindricality splicing optical window, with the light for entering cylindricality splicing optical window
Line is in 45 degree of angles；
The planar annular reflecting mirror is vertical with the plane of scanning motion reflecting mirror, and the center of area line of two plane mirrors and first
Reflected light is parallel；
The central axis of the concave surface principal reflection mirror passes through the center of area of the planar annular reflecting mirror and the face with two plane mirrors
Heart line is vertical；
The image rotation microscope group includes aberration correction microscope group and optical beam transformation microscope group.
2. optical system according to claim 1, which is characterized in that in the system:
Imaging after the light inlet field of view of receiver segmentation of the image rotation microscope group, light-emitting window connect infrared detector.
3. optical system according to claim 1 or 2, which is characterized in that in the system:
The image rotation microscope group has multiple.
4. optical system according to claim 3, which is characterized in that the number of the image rotation microscope group and the rhombic prism
The visual field segmentation number of realization is identical.
5. optical system according to claim 4, which is characterized in that multiple image transferring lens groups receive the visual field respectively
Each imaging after segmentation carries out image mosaic again.
6. optical system according to claim 1, which is characterized in that the image rotation microscope group is made of multiple lens.
7. optical system according to claim 1, which is characterized in that the concave surface principal reflection mirror is a spherical reflector.
8. optical system according to claim 1, which is characterized in that the rhombic prism is arranged at an image planes.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106597653A (en) * | 2016-11-24 | 2017-04-26 | 中国科学院长春光学精密机械与物理研究所 | Refraction and reflection optical system and refraction and reflection optical imaging method |
| 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 |
| CN108345095A (en) * | 2018-03-30 | 2018-07-31 | 中国科学院西安光学精密机械研究所 | A kind of low veiling glare round-the-clock star tracker optical texture of wide cut |
| CN112946907A (en) * | 2021-01-29 | 2021-06-11 | 中国科学院长春光学精密机械与物理研究所 | Large-view-field visible-infrared integrated compact optical camera |
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