CN101562693B - Optical imaging splicing device of double CCD image splicing detector - Google Patents
Optical imaging splicing device of double CCD image splicing detector Download PDFInfo
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- CN101562693B CN101562693B CN 200910022757 CN200910022757A CN101562693B CN 101562693 B CN101562693 B CN 101562693B CN 200910022757 CN200910022757 CN 200910022757 CN 200910022757 A CN200910022757 A CN 200910022757A CN 101562693 B CN101562693 B CN 101562693B
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Abstract
The invention discloses an optical imaging splicing device of a double CCD image splicing detector which comprises a casing, an object lens group, a composite prism, two uniform CCDs and an optical wedge adjusting mechanism with two double optical wedge components; the double optical wedge components consist of fixed optical wedges and movable optical wedges; the optical wedge adjusting mechanism is arranged in front of one CCD target surface; and optical wedge angle directions of the two double optical wedge components are mutually perpendicular. In installing and debugging process, two adjusting loop-coils connected with the two movable optical wedges by screw threads are rotated, so as to realize precise alignment of splicing edge pixel of semi target optical imaging focusing on two CCDtarget surfaces. The device of the invention effectively resolves difficulties of debugging operation in prior optical imaging splicing technique. The device has outstanding advantages of simple stru cture, light weight, convenient and time-saving debugging and high reliability.
Description
Technical field
The present invention relates to the ccd detector that photoelectronic reconnaissance and photoelectric follow-up are used, relate in particular to a kind of optical imaging splicing device of double CCD image splicing detector.
Background technology
It is strong that photoelectronic reconnaissance and tracking system have the target acquisition ability, tracking measurement precision height, and anti-electromagnetic interference capability is strong, and disguised strong, advantages such as good confidentiality occupy an important position in the employed armament systems of modern war.
Therefore ccd detector has volume, weight and cost advantage, becomes one of transducer that most of electro-optical system often selects for use.Ccd detector is as the necessary component of photoelectronic reconnaissance detection system, is generally used for the tracking of target and monitors the operating state of other tracking system.Generally constitute by a CCD (charge coupled device) and optical system.Different optical systems can satisfy ccd detector required different visual fields and resolution requirement.For a concrete optical system, resolution will reduce when it satisfied the requirement of big visual field, can only reduce the visual field and satisfy when high-resolution requires.For visual field and don't the reduction resolution that enlarges ccd detector, usually receive two 1/2 optical imagery of same optics visual field respectively with two CCD, the semi-transparent semi-reflecting Amici prism of general employing will be divided into two-way through the target imaging light beam of objective lens, wherein half of one road imaging beam focuses on the target surface of a CCD, half of another road imaging beam focuses on the target surface of another CCD, then, with the synthetic complete target image of a frame of two width of cloth ccd images, this type systematic is commonly referred to as double CCD image splicing detector by corresponding circuit.Because the target image of this class detector is to be spliced by each 1/2 optical imagery that receives of two CCD, final picture quality is how, with the merging precision of two width of cloth images promptly the target surface positional precision of two CCD much relations are arranged.In order to obtain high-quality stitching image effect, the alignment accuracy that requires two CCD target surface splicing place edge pixels usually is less than 0.3 pixel.Because the CCD Pixel Dimensions about 0.0074mm, that is to say, requires the alignment accuracy of two ccd image splicing edge pixels to be less than 0.0024mm, is to be difficult to realize this index request and adopt the conventional technology of debuging.For this reason, the image processing in later stage that adopts most of double CCD image splicing detectors solves the accurate splicing problem of splicing edge pixel, overlapping or separate when big when high infraversion malposition, the level of the edge pixel of two CCD splicing, the ccd image alignment that makes two splicings by the image processing mode not only can sacrificial section CCD valid pixel, and the height alignment can't guarantee that horizontal alignment can't guarantee the alignment accuracy less than a pixel less than an alignment accuracy that television scanning is capable.In fact, television scanning is capable, level is overlapping or can influence the observing effect of two CCD stitching images when separating greater than a pixel and actual in the processing of circuit effect in combining greater than one when the high infraversion malposition of the edge pixel of two CCD splicing.Therefore, be to guarantee high-quality image splicing effect with the image processing mode.
The paper of " the optics splicing of inferior pixel line array CCD focal plane " stepped on one piece and has been entitled as by Chinese periodical " photon journal " the 31st volume the 6th periodical.In this paper, introduced a kind of with the accurate method of aliging of image splicing edge pixel of mechanical system realization double CCD image splicing detector and the special-purpose adjusting device of implementing the accurate alignment of optical imagery.This method is installed to first CCD on the fixed mount of Amici prism frame, second CCD is installed on the fixed mount of the differential differential tuning mechanisms of leading with two groups of miniature precisions on the Amici prism frame, axial trace moved when differential differential tuning mechanism adopted two kinds of pitch differences to realize rotation, thereby realized the control of CCD target surface 0.001mm amount of movement.Special-purpose adjusting device is made up of the tool microscope of repacking and the mobile platform of high-precision universal tool-measuring microscope, can detect the exact position (precision can reach 0.001mm) of CCD target surface.The joining method of being implemented is, the Amici prism frame of adorning two CCD is placed on the turntable of special-purpose adjusting device, observing and measure second relative first CCD target surface edge locations of pixels of CCD target surface edge pixel aligns, and measurement data sent into computer, image after computer is handled data provides alignment error, the commissioning staff repeats to adjust differential differential tuning mechanism in view of the above, till second relative first CCD target surface edge locations of pixels of CCD target surface edge pixel satisfies the splicing precision.Thisly give wherein that a slice CCD installs the image processing of the method for micro-adjusting mechanism without the later stage, just can make target image realize very high splicing precision, and can solve the defective of image processing mode connecting method, but the subject matter that this method exists is the adjusting mechanism complexity, the requirement on machining accuracy height, the adjustment process complexity, difficulty is big, elapsed time is long.
Summary of the invention
The technical problem to be solved in the present invention is, the double CCD image splicing detector of using for photodetection and tracking system provides a kind of and carries the optical precision adjusting mechanism and be easy to realize splicing the optical imaging splicing device of adjustment.
For solving the problems of the technologies described above, optical imaging splicing device provided by the invention comprises housing, objective lens, composite prism, two identical CCD and wedge adjusting mechanism; Described wedge adjusting mechanism contains support, two two wedge assemblies, have internal thread and adjust volutions with two that end screw, volution and two end spiral shell in the location, described support has H shape chassis and front end is provided with externally threaded two arc guide rods, the crossbeam on H shape chassis is provided with light hole, the arc guide rod is positioned on the described crossbeam and is symmetrically placed in the light hole both sides, the arcwall face of arc guide rod is coaxial with light hole, the described pair of wedge assembly contains fixedly wedge and mobile wedge and both constitute equivalent plate glass, the installation framework of mobile wedge has external screw thread and two symmetrically arranged gathering sills, described two two wedge assemblies along the length direction of described two arc guide rods place and the angle of wedge direction of first pair of wedge assembly vertical with the angle of wedge direction of second pair of wedge assembly, two arc guide rods embed respectively in two gathering sills of described mobile wedge, two fixedly wedge then with the fixedlying connected to the inner side of arc guide rod, described two adjustment volutions and location volution all are enclosed within on two arc guide rods, first moves wedge and first adjusts volution and is threaded, second moves wedge and second adjusts volution and is threaded, first, second adjusts volution next-door neighbour and spacing by the crossbeam on described location volution and described chassis, and described two are ended spiral shell and are screwed into described two respectively and adjust the ending in the screw of volutions; Described objective lens is fixed on the front end of housing, described composite prism is fixed on the middle part of housing, a described CCD is fixed on lower part of frame, and it is parallel with vertical direction with the horizontal direction of the 2nd CCD target surface respectively that wedge adjusting mechanism and the 2nd CCD all are fixed on the wedge angular direction of the rear end of housing and first pair of wedge assembly and second pair of wedge assembly; The light beam of target after the objective lens imaging is divided into two-way by described composite prism, first via imaging beam half light beam vertical with described objective lens optical axis and the target picture focuses on the target surface of a CCD, and second half light beam of the second road imaging beam and target picture parallel with the optical axis of described objective lens focuses on the target surface of the 2nd CCD after described two two wedge assembly transmissions.
According to the present invention, the wedge angle of described two two wedge assemblies equates and 1.5 °≤θ≤4 °.
Beneficial effect of the present invention is embodied in the following aspects.
(1) the present invention has introduced a wedge adjusting mechanism that contains two two wedge assemblies between composite prism and the 2nd CCD, by taking screw displacement mechanism, make a wedge in each wedge assembly can be relatively another wedge produce and move axially, because the wedge angular direction of two wedge assemblies is parallel to the level and the vertical direction of the 2nd CCD target surface respectively, therefore the image that focuses on the 2nd CCD target surface is changed in the position of level and vertical direction, be equivalent to the variation of the 2nd CCD installation site thus, thereby realize the splicing of two width of cloth CCD optical imagerys.
(2) in the solution of the present invention, the image amount of movement cause owing to moving of wedge is 1/tens of a wedge amount of movement, therefore the present invention can realize that precision is higher than the image amount of movement of 0.001mm, thereby the image processing that can be double CCD image splicing detector provides high-quality optics stitching image.
(3) compared with prior art, because not needing special-purpose adjusting device to come the installation frame of the 2nd CCD repaiied, the present invention do not cut, and the picture position adjustment process is very simple, has therefore both saved certain physical resources, and has saved the great amount of manpower resource for follow-up batch process.
Description of drawings
Fig. 1 is that the structure of optical imaging splicing device of the present invention is formed schematic diagram.
Fig. 2 a and Fig. 2 b are the front view and the left views of composite prism shown in Fig. 1.
Fig. 3 is that the structure of the wedge adjusting mechanism shown in Fig. 1 is formed schematic diagram.
Fig. 4 a and Fig. 4 b are respectively the front view and the left views of support shown in Fig. 3.
Fig. 5 a and Fig. 5 b are respectively the front view and the left views of mobile wedge shown in Fig. 3.
Fig. 6 is the index path of optical imaging splicing device of the present invention.
Fig. 7 is the operation principle schematic diagram of two wedge assemblies.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing and preferred embodiment.
According to shown in Figure 1, the optics splicing apparatus of the preferred embodiment of the present invention comprises objective lens 1, composite prism 2, wedge adjusting mechanism 3, housing 4, two identical CCD chips 5 and 6, two connecting plates 7 and 8.The lens barrel of objective lens 1 is threaded with housing 4 front ends.Composite prism 2 forms (referring to Fig. 2 a and Fig. 2 b) by 45 ° of right-angle prisms and 45 ° of angle of wedge prism gummeds, is coated with the visible light light-splitting rete on its 45 ° of light splitting surface B, and the reflectivity of spectro film is 70%, and transmissivity is 30%; And one of two right-angle side of 45 ° of right-angle prisms are as light entrance face A, and another is as light reflection surface C and be coated with reflective coating.When light beam is entered by incident surface A in the composite prism 2, a part of light beam reflexes to the light reflection surface C of right-angle prism through 45 ° of light splitting surface B, reflexes to the first light-emitting face D of composite prism 2 and transmits through light reflection surface C again; And another part light beam directly is transmitted to the second light-emitting face E of composite prism 2 and transmits through 45 ° of light splitting surface B.Composite prism 2 is connected in the middle part of housing 4 by prism holder and is positioned at the rear of objective lens 1.The one CCD chip 5 is connected in the bottom of housing 4 by first connecting plate 7, and its target surface is relative with the first emergent light face of composite prism 2; Wedge adjusting mechanism 3, the 2nd CCD chip 6 all are connected in the rear end of housing 4 by second connecting plate 8, wedge adjusting mechanism 3 is between the target surface of the second emergent light face of composite prism 2 and the 2nd CCD chip 6.
According to shown in Figure 3, wedge adjusting mechanism 3 contains support 31, have internal thread and end two of screw and adjust volution 32 and 33, two two wedge assemblies 34 and 35, location volution 36 and two and end spiral shell 37 and 38.Support 31 has chassis 31-1 and front end is provided with externally threaded two arc guide rod 31-2 (Fig. 4 a and Fig. 4 b), chassis 31-1 is that the two ends of H shape and two montants all have installing hole, the crossbeam of chassis 31-1 is that two concentric circles segmental arcs of above-below direction symmetry constitute and the middle light hole that is provided with of crossbeam, two arc guide rod 31-2 symmetries are positioned at the both sides up and down of light hole, and two arc sections of the arcwall face of arc guide rod 31-2 and crossbeam are all coaxial with light hole.Two wedge assemblies 34 or 35 contain fixedly wedge 34-1 or 35-1 and mobile wedge 34-2 or 35-2, and the wedge angle of two wedges in two wedge assemblies 34 or 35 equates, thereby constitutes equivalent plate glass.In this preferred embodiment, the wedge angle of four wedge 34-1,34-2,35-1,35-2 is 2.8 °.Two fixedly the installation tube external diameter of wedge 34-1,35-1 is suitable with the distance between 31 two arc guide rods of support 31-2 inboard, the installation tube external diameter of two mobile wedge 34-2,35-2 then with 31 two arc guide rods of support 31-2 outside between distance suitable.Be equipped with external screw thread on the installation tube of two mobile wedge 34-2,35-2 and along two gathering sills (referring to Fig. 5 a and Fig. 5 b) of axis direction, two gathering sill radial symmetric and groove width are corresponding with the width of arc guide rod 31-2; Different is, first to move the angle of wedge direction of wedge 34-2 vertical with the line of centres of two gathering sills, and second to move the angle of wedge direction of wedge 35-2 parallel with the line of centres of two gathering sills.Two two wedge assemblies 34 and 35 are between two arc guide rod 31-2 of support, and the angle of wedge of the first wedge assembly is positioned at horizontal direction, and the angle of wedge direction of the second wedge assembly is positioned at vertical direction.First, second moving admittedly wedge 34-1,35-1 are positioned at the axial two ends of arc guide rod 31-2, and it installs the interior side bonds of drum outer wall with glue and arc guide rod 31-2.Two adjust volution 32 and 33 and location volution 36 all be enclosed within on two arc guide rod 31-2, the second adjustment volution 33 is spacing by the chassis 31-1 of support 31, locating ring 36 is threaded with the front end of two arc guide rod 31-2, and the chassis 31-1 of location volution 36 and support 31 defines first, second axial endplay of adjusting volution 32,33.First, second moves wedge 34-2,35-2 between first, second moving admittedly wedge 34-1,35-1, its install that framework adjusts with first, second that volution 32,33 is threaded respectively and two gathering sills in embed two arc guide rod 31-2 respectively, can only move vertically and can not rotate thereby make first, second move wedge 34-2,35-2.The two piece montants of wedge adjusting mechanism 3 by chassis 31-1 contact the back and are connected on the housing 4 by screw with the connecting portion of the 2nd CCD chip 6, during assembling, should make the wedge angular direction of first pair of wedge assembly 34 and second pair of wedge assembly 35 parallel with the horizontal direction of the 2nd CCD chip 6 target surfaces respectively with vertical direction.First ends spiral shell 37 and second ends spiral shell 38 and is screwed into first, second respectively and adjusts ending in screw of volution 32,33.
According to shown in Figure 6, the light beam of target after objective lens 1 imaging is divided into two-way by composite prism 2, first via imaging beam half light beam vertical with objective lens 1 optical axis and the target picture focuses on the target surface of a CCD chip 5, and the second road imaging beam and second half light beam target picture parallel with the optical axis of objective lens 1 focuses on the target surface of the 2nd CCD chip 6 after four wedge 34-1,34-2 in wedge adjusting mechanism 3,35-1, the 35-2 transmission successively.
According to shown in Figure 7, when first, second is adjusted volution 32,33 and makes mobile wedge 34-2 in two wedge assemblies 34 or 35 or 35-2 its home position P0 and, the picture position that focuses on the 2nd CCD chip 6 target surfaces will be changed to A1 and A2 place respectively in level or vertical direction by A0 relatively left respectively along axis and move right (with the drawing definition) during to position P1 and position P2 by turn.The different axial internal clearances of mobile wedge 34-2 or 35-2 will make the optical imagery that is imaged on the 2nd CCD chip 6 target surfaces have different displacements in level or vertical direction.The size of the light wedge angle in two wedge assemblies depends on adjusts precision or adjusting range, when the light wedge angle is 1.5 °～4 °, the displacement of optical imagery has only 1/28～1/14 of mobile wedge axial internal clearance on the 2nd CCD chip 6 target surfaces, when the light wedge angle was 2.8 °, the displacement of optical imagery was slightly less than 1/20 of mobile wedge axial internal clearance on the 2nd CCD chip 6 target surfaces.Be not difficult to find out that the light wedge angle is little, adjusting range is big and adjust the precision height, and wedge angle greatly then adjusting range is little and to adjust precision low.
Introduce the splicing adjustment process of two CCD optical imagerys below in conjunction with the preferred embodiment of the present invention.
When assembling, at first two mobile wedge 34-2,35-2 are placed the centre position of its moving range; Second goes on foot, and adjusts the installation site of second connecting plate 8 and housing 4, and optical imagery that focuses on the 2nd CCD chip 6 target surfaces and the optical imagery that focuses on a CCD chip 5 target surfaces are controlled in 15 pixels in the alignment error on the both direction; The 3rd step, unclamp first and end spiral shell 37, turn first is adjusted volution 32 and is observed by oscilloscope, make the optical imagery that focuses on the 2nd CCD chip 6 target surfaces and focus on optical imagery alignment error in the horizontal direction on a CCD chip 5 target surfaces less than 0.2 pixel, then, tighten first and end spiral shell 37; The 4th step, unclamp second and end spiral shell 38, turn second is adjusted volution 33 and is observed by oscilloscope, make the optical imagery that focuses on the 2nd CCD chip 6 target surfaces and focus on optical imagery alignment error in vertical direction on a CCD chip 5 target surfaces less than 0.2 pixel, then, tighten second and end spiral shell 38.From above-mentioned adjustment process as can be seen, the optics splicing apparatus of double CCD image splicing detector provided by the invention only need be finished the accurate butt joint that coarse adjustment and accurate adjustment can realize two width of cloth ccd images in assembling process, coarse adjustment only requires that alignment error is controlled in 15 pixels, and 15 interior pairing how much alignment errors of pixel are not more than 0.12mm, and this index is easy to realize with the conventional technology of debuging; For accurate adjustment, also two processes of adjusting volution of turn repeatedly under oscillographic cooperation just.Therefore says that the present invention is reaching under the alignment accuracy prerequisite that prior art realizes, not only do not need the adjusting device of specially joining, and the adjustment process of aliging is simplified greatly.
Claims (2)
1. the optical imaging splicing device of two ccd detectors, comprise housing [4], objective lens [1], composite prism [2], two identical CCD[5 and 6], described objective lens [1] is fixed on the front end of housing [4], described composite prism [2] is fixed on the middle part of housing [1], a described CCD[5] be fixed on the bottom of housing [4], described the 2nd CCD[6] be fixed on the rear end of housing [4]; It is characterized in that: also comprise wedge adjusting mechanism [3], described wedge adjusting mechanism [3] contains support [31], two two wedge assemblies [34 and 35], have internal thread and adjust volutions [32 and 33] with two that end screw, location volution [36] and two are spiral shell [37 and 38] only, described support [31] has H shape chassis [31-1] and front end is provided with externally threaded two arc guide rods [31-2], the crossbeam on H shape chassis [31-1] is provided with light hole, arc guide rod [31-2] is positioned on the described crossbeam and is symmetrically placed in the light hole both sides, the arcwall face of arc guide rod [31-2] is coaxial with light hole, described pair of wedge assembly [34 or 35] contains fixedly wedge [34-1 or 35-1] and mobile wedge [34-2 or 35-2] and both constitute equivalent plate glass, the installation framework of mobile wedge [34-2 or 35-2] has external screw thread and two symmetrically arranged gathering sills, described two two wedge assemblies [34 and 35] along the length direction of described two arc guide rods [31-2] place and the angle of wedge direction of first pair of wedge assembly [34] vertical with the angle of wedge direction of second pair of wedge assembly [35], two arc guide rods [31-2] embed respectively in two gathering sills of described mobile wedge [34-2 and 35-2], described fixedly wedge [34-1 and 34-2] then with the fixedlying connected to the inner side of arc guide rod [31-2], described two adjustment volutions [32 and 33] and location volution [36] all are enclosed within on two arc guide rods [31-2], first moves wedge [34-2] and first adjusts volution [32] and is threaded, second moves wedge [35-2] and second adjusts volution [33] and is threaded, first, second adjusts volution [32,33] next-door neighbour and spacing by the crossbeam of described location volution [36] and described chassis [31-1], described two are ended spiral shell [37 and 38] and are screwed into respectively in described two only screws of adjusting volutions [32 and 33]; Described wedge adjusting mechanism [3] is positioned at described composite prism [2] and the 2nd CCD[6] between and be connected with described housing [4], the wedge angular direction of described first pair of wedge assembly [34] and second pair of wedge assembly [35] respectively with the 2nd CCD[6] horizontal direction of target surface is parallel with vertical direction; The light beam of target after objective lens [1] imaging is divided into two-way by described composite prism [2], vertical and the target picture half light beam with described objective lens [1] optical axis of first via imaging beam focuses on a CCD[5] target surface on, second half light beam of the second road imaging beam and target picture parallel with the optical axis of described objective lens [1] is through focusing on the 2nd CCD[6 after described two two wedge assembly [34 and 35] transmissions] target surface on.
2. the optical imaging splicing device of pair ccd detector according to claim 1 is characterized in that: the wedge angle of described two two wedge assemblies [34 and 35] equates and 1.5 °≤θ≤4 °.
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| CN 200910022757 CN101562693B (en) | 2009-06-01 | 2009-06-01 | Optical imaging splicing device of double CCD image splicing detector |
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| CN 200910022757 CN101562693B (en) | 2009-06-01 | 2009-06-01 | Optical imaging splicing device of double CCD image splicing detector |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101980067A (en) * | 2010-10-22 | 2011-02-23 | 中国航空工业集团公司洛阳电光设备研究所 | Infrared optical system using two optical wedges for focusing |
| CN102523476B (en) * | 2011-12-12 | 2013-11-27 | 中国科学院长春光学精密机械与物理研究所 | Linear light modulation switching mechanism of television measurement system of large-caliber equipment |
| CN102752503B (en) * | 2012-07-09 | 2014-11-05 | 中国兵器工业第二0五研究所 | TV camera device with four spliced double-light-path CCDs (Charge Coupled Devices) |
| CN102928948A (en) * | 2012-11-22 | 2013-02-13 | 福鼎市一雄光学仪器有限公司 | Synchronous-monitoring dual-system optical imaging telephoto lens for security protection |
| CN104702813A (en) * | 2015-02-11 | 2015-06-10 | 杭州载力科技有限公司 | Multi-CCD spliced scanning mechanism and image processing method through same |
| CN106060354B (en) * | 2016-07-07 | 2019-09-17 | 西安应用光学研究所 | A kind of high frame-rate digital CCD photographic device of double large area arrays |
| CN106842534B (en) * | 2017-03-22 | 2019-12-24 | 上海理工大学 | Automatic focusing microscope based on double CCD and measuring method |
| CN108008541B (en) * | 2017-10-25 | 2020-07-10 | 中国航空工业集团公司洛阳电光设备研究所 | Method for installing and adjusting double optical wedges |
| CN113837929B (en) * | 2021-09-18 | 2024-04-12 | 中国科学院长春光学精密机械与物理研究所 | Graph splicing device and method |
| CN115504311A (en) * | 2022-08-23 | 2022-12-23 | 重庆编福科技有限公司 | Sheet splicing and aligning system and method based on double CCD sensors |
| CN115903339A (en) * | 2022-10-27 | 2023-04-04 | 瑞芯微电子股份有限公司 | Device and method for controlling micro focusing of lens and lens equipment |
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| C06 | Publication | ||
| PB01 | Publication | ||
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