CN103345110B - The robust structure of scalability aviation digital camera - Google Patents
The robust structure of scalability aviation digital camera Download PDFInfo
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- CN103345110B CN103345110B CN201310303963.4A CN201310303963A CN103345110B CN 103345110 B CN103345110 B CN 103345110B CN 201310303963 A CN201310303963 A CN 201310303963A CN 103345110 B CN103345110 B CN 103345110B
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Abstract
The present invention relates to the robust structure of scalability aviation digital camera, comprising: camera lens, lens barrel and back, front group of sleeve, front group of ring, rear group of sleeve, rear group of ring, card extender and adjustment pad; The edge that front group of jacket casing is organized on shutter and before pushing down camera lens; Front group of ring set, on camera lens, which is provided with tight mouth screw thread, locks with front group of sleeve; Rear group of ring is placed in lens barrel, is fixed on the inwall of lens barrel by four screws; Rear group of ring is provided with the first hickey; Rear group of sleeve is connect by the first hickey and rear group of ring set, organizes edge after pushing down camera lens; Card extender is ring texture, and is located between lens barrel and back; Be provided with boss, card extender is socketed by boss and lens barrel; The opposite side of card extender is connected with back; Be provided with adjustment pad between card extender and lens barrel, regulate pad to be connected with card extender.The robust structure of above-mentioned scalability aviation digital camera improves entirety shooting steadiness, the shooting precision of aerial camera, can realize measurement shooting.
Description
Technical field
The present invention relates to photography, in particular to the robust structure of scalability aviation digital camera.
Background technology
Aeroplane mapping is one of China's base surveying means, and it is in the acquisition of spatial information and play irreplaceable effect in upgrading.Although China's Surveying and Mapping Industry has development at full speed in recent years, aeroplane photography at present still major part adopts common civil camera.Or directly use expensive import measurement type air camera.Or simple consolidation process is carried out to civil camera, specifically according to the profile of civil camera, plurality of plates is adopted to combine and be fastened by bolts rear formation general frame, general frame is connected fastening by screw with civil camera, form the reinforcing of the back to civil camera, fuselage and camera lens, make camera become a rigid structure.
Problems existing is: even if carried out the civil camera of consolidation process, and its inner structure does not change, and the stability of camera internal structure is unknown, cannot use as scalability camera.And still stable not in the Aerial photography of reality, especially under complex environment condition, the focal plane of camera easily produces skew, is difficult to realize measurement.
Summary of the invention
The object of the present invention is to provide the robust structure of scalability aviation digital camera, to solve the above problems.
The robust structure of the scalability aviation digital camera provided in an embodiment of the present invention, comprising: camera lens, lens barrel and back, also comprise: front group of sleeve, front group of ring, rear group of sleeve, rear group of ring, card extender and adjustment pad;
The edge that before described, group jacket casing is organized on shutter and before pushing down camera lens; Before described, group ring set is on camera lens, which is provided with tight mouth screw thread, and by described tight mouth screw thread, before described, group ring front organized sleeve with described and locked;
Described rear group of ring is placed in lens barrel, is fixed on the inwall of lens barrel by four screws be equally spaced in the circumference of lens barrel by described rear group of ring; Described rear group of ring is provided with the first hickey; Described rear group of sleeve is screwed in described rear group of ring by described first hickey and connects with described rear group of ring set, organizes edge after pushing down camera lens;
Described card extender is ring texture, is located between lens barrel and back; Described card extender is provided with boss near the side of lens barrel, and described card extender is socketed by described boss and lens barrel; The opposite side of described card extender is connected with back;
Be provided with described adjustment pad between described card extender and lens barrel, described adjustment pad is connected with described card extender.
The robust structure of scalability aviation digital camera provided by the invention, by arranging front group of ring and rear group of ring, and respectively front group of sleeve and rear group of sleeve are fixed on camera lens and lens barrel by front group of ring and rear group of ring, by front group of jacket casing soon outdoors, organize before making before camera lens pushed down by sleeve and organize edge; Rear group of sleeve is placed in lens barrel, the steadiness between each parts is organized after group, shutter and camera lens before organizing edge after making it push down camera lens and then improve camera lens internal lens, the camera lens that can ensure camera when taking photo by plane can not be loosened because of the impact of air-flow or vibration, improving the sharpness of taking pictures.
Meanwhile, by using card extender and regulating the stable connection between pad raising lens barrel and hand-held back.Compare and lens barrel is directly connected by screw with back, lens barrel is connected by card extender the two can be made to connect more fastening with back.Arrange between card extender and lens barrel simultaneously and regulate pad can make camera accurate focusing.When fuselage length is fixed, in order to regulate mismachining tolerance, adjustment pad is set between card extender and lens barrel, in the target focussing process of infinite distance, makes camera to infinite distance imaging clearly by the adjustment pad changing different-thickness in the gap between card extender and lens barrel.
The camera that Aerial photography provided by the invention uses focusing in advance before shooting is also fixed, and need not focus, so can ensure camera body stability under vibration in actual photographed process.When arranging adjustment pad, adjustment pad, as regulating depending on of pad, is fixed on card extender by card extender, and then the adjustment pad of setting can be made more firm, even if the impact being subject to air-flow in the process of taking photo by plane also can not misplace easily.
So, the robust structure of scalability aviation digital camera provided by the invention is by the comprehensive steadiness improved between camera lens and lens barrel, and the stable connection between camera lens and back, and then improve the entirety shooting steadiness of aerial camera, improve shooting precision, measurement shooting can be realized.
Accompanying drawing explanation
Fig. 1 is the sectional view of the lens barrel of the robust structure of scalability aviation digital camera provided by the invention;
Fig. 2 is the structural representation of the side that in the robust structure of scalability aviation digital camera provided by the invention, card extender is connected with back;
The structural representation of the side that card extender is connected with lens barrel in the robust structure of Fig. 3 scalability aviation digital camera provided by the invention;
1. screw, 2. card extender, 3. regulate pad, 4. lens barrel, and group sleeve, 6. camera lens anti-dust ring, 7. silicagel pad 5., 8., group ring, organizes sleeve 9., organize ring 10., 11.O type circle, 12.L shape briquetting, 13. curved compressing tablets, 14. monodentate briquettings, 15. boss.
Embodiment
Also by reference to the accompanying drawings the present invention is described in further detail below by specific embodiment.
Embodiment 1: as shown in Figure 1 to Figure 3,
The robust structure of scalability aviation digital camera, comprising: camera lens, lens barrel 4 and back, also comprise: front group of sleeve 5, front group of ring 8, rear group of sleeve 9, rear group of ring 10, card extender 2 and adjustment pad 3;
Before described, group sleeve 5 is enclosed within shutter and the edge organized before pushing down camera lens; Before described, group ring 8 is enclosed within camera lens, which is provided with tight mouth screw thread, by described tight mouth screw thread, before described group ring 8 with described before organize sleeve 5 and lock;
Described rear group of ring 10 is placed in lens barrel 4, is fixed on the inwall of lens barrel 4 by four screws 1 be equally spaced in the circumference of lens barrel 4 by described rear group of ring 10; Described rear group of ring 10 is provided with the first hickey; Described rear group of sleeve 9 is screwed in described rear group of ring 10 by described first hickey and is socketed with described rear group of ring 10, organizes edge after pushing down camera lens;
Described card extender 2 is ring texture, and is located between lens barrel 4 and back; Described card extender 2 is provided with boss 15 near the side of lens barrel 4, and described card extender 2 is socketed with lens barrel 4 by described boss 15; The side of described card extender 2 is connected with back;
Be provided with described adjustment pad 3 between described card extender 2 and lens barrel 4, described adjustment pad 3 is connected with described card extender 2.
The robust structure of scalability aviation digital camera provided by the invention, by arranging front group of ring 8 and rear group of ring 10, and respectively front group of sleeve 5 and rear group of sleeve 9 are fixed on camera lens and lens barrel 4 by front group of ring 8 and rear group of ring 10, be enclosed within by front group of sleeve 5 soon outdoors, before making, group sleeve 5 organizes edge before pushing down camera lens; Rear group of sleeve 9 is placed in lens barrel 4, the steadiness between each parts is organized after group, shutter and camera lens before organizing edge after making it push down camera lens and then improve camera lens internal lens, the camera lens that can ensure camera when taking photo by plane can not be loosened because of the impact of air-flow or vibration, improving the sharpness of taking pictures.
Meanwhile, the stable connection between lens barrel 4 and hand-held back is improved by use card extender 2 and adjustment pad 3.Compare and lens barrel 4 is directly connected by screw with back, lens barrel 4 is connected by card extender 2 the two can be made to connect more fastening with back.Arrange between card extender 2 and lens barrel 4 simultaneously and regulate pad 3 can make camera accurate focusing.When fuselage length is fixed, in order to regulate mismachining tolerance, arrange between card extender 2 and lens barrel 4 and regulate pad 3, in the target focussing process of infinite distance, make camera to infinite distance imaging clearly by the adjustment pad 3 changing different-thickness in the gap between card extender 2 and lens barrel 4.Because the camera that Aerial photography provided by the invention uses focusing in advance before shooting is also fixed, need not focus in actual photographed process, so camera body stability under vibration can be ensured.When arranging adjustment pad 3, adjustment pad 3, as regulating depending on of pad 3, is fixed on card extender 2 by card extender 2, and then the adjustment pad 3 of setting can be made more firm, even if the impact being subject to air-flow in the process of taking photo by plane also can not misplace easily.
So, the robust structure of scalability aviation digital camera provided by the invention is by the comprehensive steadiness improved between camera lens and lens barrel 4, and the stable connection between camera lens and back, and then improve the entirety shooting steadiness of aerial camera, improve shooting precision, measurement shooting can be realized.
Embodiment 2: the robust structure of scalability aviation digital camera, comprising: camera lens, lens barrel 4 and back, also comprise: front group of sleeve 5, front group of ring 8, rear group of sleeve 9, rear group of ring 10, card extender 2 and adjustment pad 3;
Before described, group sleeve 5 is enclosed within shutter and the edge organized before pushing down camera lens; Before described, group ring 8 is enclosed within camera lens, which is provided with tight mouth screw thread, by described tight mouth screw thread, before described group ring 8 with described before organize sleeve 5 and lock;
Described rear group of ring 10 is placed in lens barrel 4, is fixed on the inwall of lens barrel 4 by four screws 1 be equally spaced in the circumference of lens barrel 4 by described rear group of ring 10; Described rear group of ring 10 is provided with the first hickey; Described rear group of sleeve 9 is screwed in described rear group of ring 10 by described first hickey and is socketed with described rear group of ring 10, organizes edge after pushing down camera lens;
Described card extender 2 is ring texture, and is located between lens barrel 4 and back; Described card extender 2 is provided with boss 15 near the side of lens barrel 4, and described card extender 2 is socketed with lens barrel 4 by described boss 15; The side of described card extender 2 is connected with back;
Be provided with described adjustment pad 3 between described card extender 2 and lens barrel 4, described adjustment pad 3 is connected with described card extender 2.
The robust structure of scalability aviation digital camera provided by the invention, by arranging front group of ring 8 and rear group of ring 10, and respectively front group of sleeve 5 and rear group of sleeve 9 are fixed on camera lens and lens barrel 4 by front group of ring 8 and rear group of ring 10, be enclosed within by front group of sleeve 5 soon outdoors, before making, group sleeve 5 organizes edge before pushing down camera lens; Rear group of sleeve 9 is placed in lens barrel 4, the steadiness between each parts is organized after group, shutter and camera lens before organizing edge after making it push down camera lens and then improve camera lens internal lens, the camera lens that can ensure camera when taking photo by plane can not be loosened because of the impact of air-flow or vibration, improving the sharpness of taking pictures.
Meanwhile, the stable connection between lens barrel 4 and hand-held back is improved by use card extender 2 and adjustment pad 3.Compare and lens barrel 4 is directly connected by screw with back, lens barrel 4 is connected by card extender 2 the two can be made to connect more fastening with back.Arrange between card extender 2 and lens barrel 4 simultaneously and regulate pad 3 can make camera accurate focusing.When fuselage length is fixed, in order to regulate mismachining tolerance, arrange between card extender 2 and lens barrel 4 and regulate pad 3, in the target focussing process of infinite distance, make camera to infinite distance imaging clearly by the adjustment pad 3 changing different-thickness in the gap between card extender 2 and lens barrel 4.Because the camera that Aerial photography provided by the invention uses focusing in advance before shooting is also fixed, need not focus in actual photographed process, so camera body stability under vibration can be ensured.When arranging adjustment pad 3, adjustment pad 3, as regulating depending on of pad 3, is fixed on card extender 2 by card extender 2, and then the adjustment pad 3 of setting can be made more firm, even if the impact being subject to air-flow in the process of taking photo by plane also can not misplace easily.
So, the robust structure of scalability aviation digital camera provided by the invention is by the comprehensive steadiness improved between camera lens and lens barrel 4, and the stable connection between camera lens and back, and then improve the entirety shooting steadiness of aerial camera, improve shooting precision, measurement shooting can be realized.
In order to improve the sealing of aerial camera, cause in shooting process, its inside can not because of the sharpness entering dust or other impurity effect camera lens easily, can before described group sleeve 5 on be provided with camera lens anti-dust ring 6, described camera lens anti-dust ring 6 is provided with the second hickey, is connected with front group of sleeve 5 by camera lens anti-dust ring 6 described in described second hickey;
Lens cap is placed in described camera lens anti-dust ring 6.
Because the filter of camera is also located at the front end of camera lens, in order to avoid the impact when needing to use filter because of the camera lens anti-dust ring 6 arranged, the connecting thread interface being used for coordinating with the second hickey can be set in camera lens front end, can be used in the connection with multiple hickey.Preferably, can arrange described connecting thread interface can either coordinate with described second hickey, also can be connected with the connecting thread of filter.
More fastening in order to what make to be connected between back with card extender 2, back can be fixedly connected with by screw 1 with described card extender 2.Being rigidly connected, the position therebetween that makes to be connected is more difficult to be offset.
In order to reduce the rate of wear of camera, buffering friction shim can be set.Particularly, in order to reduce described before organize edge before group sleeve 5 and described camera lens surface of contact between rigidity friction, can silicagel pad 77 be set between; In order to organize edge after reducing described rear group of sleeve 9 and described camera lens surface of contact between rigidity friction, also can silicagel pad 77 be set between.
In order to improve the sealing connected between lens barrel 4 and card extender 2, can be provided with the limited impression for limiting the circumferential displacement between card extender 2 and lens barrel 4 on the inwall of lens barrel 4, described limited impression and described boss 15 coordinate location.Like this, boss 15 and lens barrel 4 are directly connected more fastening, and then improve the tightness between card extender 2 and lens barrel 4.
O type circle 11, the O type circle 11 that side card extender 2 being arranged boss 15 is provided with for improving the connection sealing between card extender 2 and back is enclosed within described boss 15, improves the sealing between lens barrel 4 and card extender 2.
Conveniently arrange and regulate pad 3, the thickness regulating the thickness of pad 3 to be less than boss 15 can be set; Pad 3 is regulated to be located at card extender 2 with the gap of the junction of lens barrel 4.Usually adjustment pad 3 is located in the gap of lens barrel 4 and card extender 2 junction, so the thickness regulating the thickness of pad 3 to be less than the boss 15 that card extender 2 is arranged can be arranged; Pad 3 is regulated to be located at card extender 2 with the gap of the junction of back.
After securing in the length of camera body, can regulate the precision of shooting within adjustable scope further, can arrange and regulate pad 3 between lens barrel 4 and card extender 2, the thickness of pad is generally the size within the adjustable extent of mismachining tolerance.The thickness of pad should be greater than the minimum thickness of economic processing, is less than the distance of O type circle 12 maximum gauge place and pad transfer fishplate bar 2 surface of contact.
Be provided with at least three between card extender 2 and lens barrel 4 and regulate pad 3; The thickness of each adjustment pad 3 is identical or different.Meanwhile, in order to multi-faceted adjustment take precision, can be provided with at least three and regulate pad 3 between card extender 2 and lens barrel 4, different according to the degree that the tune in each orientation is established, the thickness that can arrange each adjustment pad 3 is identical or different.
Regulate pad 3 to comprise four, be annular; Four annular gaskets are symmetrically distributed on card extender 2.
Preferably, described adjustment pad 3 comprises four, is annular;
Four described annular gaskets are symmetrically distributed on the periphery of described card extender 2, and particularly, four described annular gaskets are symmetrically distributed on the periphery of ccd image sensor plane.
Described card extender 2 is provided with the cushion block for being fastenedly connected with back.Tightr in order to what make cushion block and back coordinate, according to the profile feature of camera back self, difform cushion block can be set according to different positions and carry out satisfied specific position needs, such as, monodentate briquetting 14, L shape briquetting 12, curved compressing tablet 13 can be set, back is connected closely with card extender 2.
Described card extender 2 is quadrilateral, and four angles of described card extender 2 arrange a described adjustment pad 3 respectively.The annular simultaneously set up regulates pad 3 that structural element can be made to pass, and can also regulate while not affecting adjustment.
Simultaneously in order to improve the stability in fine setting, the material of described adjustment pad 3 is No. 45 steel, and through ovennodulation, zinc-plated and blackening process.
In order to meet the feature of rigidity and light weight, fuselage can be set and card extender 2 material is duralumin 2A12, and through blackout, blasting treatment.
Fuselage size design needs to calculate fuselage theoretical length, according to CCD size determination lens barrel 4 internal diameter according to the flange focal distance of camera lens and back CCD plane to the distance of installed surface.
Due to the frock error of camera lens and back, cannot make camera exact focus according to the fuselage of fuselage theoretical length design, the fuselage therefore designed is made up of three parts, lens barrel 4, pad and card extender 2, is changed the entire length of fuselage by the pad of different-thickness.
In order to accurately locate and dust-proof lucifuge, arrange installation seam between fuselage and card extender 2, specifically preferably, described installation seam is the installation base be arranged on described card extender 2 and the installation groove be arranged on lens barrel 4, installation base and installation groove fit.
In order to adjustment shooting precision that can be more accurate, can arranging between lens barrel 4 and card extender 2 and regulate pad 3, regulating pad 3 to regulate shooting precision by setting up.Be fixed on card extender 2 by adjustment pad 3 after regulating shooting precision, like this, in Aerial photography process, the mechanism of camera internal is rigid fixation structure, can not changing position easily, and then makes shooting effect better.
By the theoretical value of fuselage length, manufacture the Rigidity and strength of metal material, and mutual relationship determination lens barrel 4 between lens barrel 4, pad and card extender 2, card extender 2 processing length, and the theoretical value of spacer thickness.
Charge Coupled Device (CCD) CCD image sensor (ChargeCoupledDevice), it uses a kind of semiconductor material of ISO to make, light can be transformed into electric charge, digital signal is converted to by analog to digital converter chip, digital signal is preserved by the flash memory of camera internal or built-in hard disk card after overcompression, thus easily data can be transferred to computing machine, and by means of the process means of computing machine, revise image with imagination as required.So ccd sensor is a kind of sensor conventional on camera.
Because the breadth of the ccd sensor that camera is arranged is larger, in order to ensure CCD center and edge exact focus, and the verticality of camera lens primary optical axis and CCD plane, need to distribute at least three pads between lens barrel 4 and card extender 2, in order to focus conveniently, design the both sides that four pads are symmetrically distributed in CCD long limit middle vertical plane and minor face middle vertical plane between two, pad is annular, when ensureing rigidity, pad external diameter is as far as possible little, pad is fixed between lens barrel 4 and card extender 2 by screw 1, it lens barrel 4 is counter sink, it card extender 2 is threaded hole, the precise thickness of everywhere pad is determined by the method for focusing to infinite distance target.Then according to depth of focus formula Δ=2 λ F
2calculate depth of focus, thus determine the maximum mismachining tolerance of spacer thickness, ensure that the spacer thickness of processing is in this error range.
Camera can be clear to infinite distance target imaging, and airframe structure is stablized, the requirement of picture scalability boat camera in meeting.
So in the robust structure of scalability aviation digital camera provided by the invention, fuselage design adopts the mode of fixing afterwards of first focusing, eliminate the link needing to focus in shooting process, ensure that the stability of airframe structure.And the camera lens primary optical axis and CCD plane off plumb problem that adopt four pads to solve to bring due to frock error, ensure that the sharpness at image center and edge simultaneously., not only camera lens and fuselage are fixed meanwhile, and fixed organizing before and after camera lens, make camera lens part be divided into one and connect rigid body closely.So the robust structure of scalability aviation digital camera provided by the invention can make aerial camera realize measurement shooting.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the robust structure of scalability aviation digital camera, comprising: camera lens, lens barrel and back, is characterized in that, also comprises: front group of sleeve, front group of ring, rear group of sleeve, rear group of ring, card extender and adjustment pad;
The edge that before described, group jacket casing is organized on shutter and before pushing down camera lens; Before described, group ring set is on camera lens, which is provided with tight mouth screw thread, and by described tight mouth screw thread, before described, group ring front organized sleeve with described and locked;
Described rear group of ring is placed in lens barrel, is fixed on the inwall of lens barrel by four screws be equally spaced in the circumference of lens barrel by described rear group of ring; Described rear group of ring is provided with the first hickey; Described rear group of sleeve is screwed in described rear group of ring by described first hickey and connects with described rear group of ring set, organizes edge after pushing down camera lens;
Described card extender is ring texture, is located between lens barrel and back; Described card extender is provided with boss near the side of lens barrel, and described card extender is socketed by described boss and lens barrel; The opposite side of described card extender is connected with back;
Be provided with described adjustment pad between described card extender and lens barrel, described adjustment pad is connected with described card extender.
2. the robust structure of scalability aviation digital camera according to claim 1, is characterized in that,
Before described, group sleeve is provided with camera lens anti-dust ring, and described camera lens anti-dust ring is provided with the second hickey, by camera lens anti-dust ring described in described second hickey and front group of sleeve connection;
Lens cap is placed in described camera lens anti-dust ring.
3. the robust structure of scalability aviation digital camera according to claim 1, is characterized in that,
Back is fixedly connected with by screw with described card extender.
4. the robust structure of scalability aviation digital camera according to claim 1, is characterized in that,
Between the surface of contact at edge organized before group sleeve and described camera lens before described, and between the surface of contact organizing edge after described rear group of sleeve and described camera lens, be equipped with the silicagel pad that reduction rigidity each other rubs.
5. the robust structure of scalability aviation digital camera according to claim 1, is characterized in that,
The inwall of lens barrel is provided with the limited impression for limiting the circumferential displacement between described card extender and lens barrel, and described limited impression and described boss coordinate location.
6. the robust structure of scalability aviation digital camera according to claim 5, is characterized in that,
The side described card extender being arranged described boss is provided with the O type circle for improving the connection sealing between described card extender and back, and described O type snare is on described boss.
7. the robust structure of scalability aviation digital camera according to claim 1, is characterized in that,
The thickness of described adjustment pad is less than the thickness of described boss; Described adjustment pad is located in the gap of the junction of described card extender and lens barrel.
8. the robust structure of scalability aviation digital camera according to claim 7, is characterized in that,
At least three described adjustment pads are provided with between described card extender and lens barrel; The thickness of each described adjustment pad is identical or different.
9. the robust structure of scalability aviation digital camera according to claim 8, is characterized in that,
Described adjustment pad comprises four, is annular;
Four described adjustment pads are symmetrically distributed on described card extender.
10. the robust structure of the scalability aviation digital camera according to claim 1-9 any one, is characterized in that,
The material of described adjustment pad is No. 45 steel;
The material of described card extender is duralumin 2A12.
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| CN101477239A (en) * | 2009-01-16 | 2009-07-08 | 中国人民解放军国防科学技术大学 | Star sensor lens and its use method in large-temperature range accurate fixed star azimuth measurement |
| CN101820505A (en) * | 2010-05-06 | 2010-09-01 | 中国科学院西安光学精密机械研究所 | Large-viewing field space shooting device |
| CN201909932U (en) * | 2010-11-04 | 2011-07-27 | 北京天元四维科技有限公司 | Aviation digital camera fixing structure |
| CN103048849A (en) * | 2012-12-26 | 2013-04-17 | 中国科学院西安光学精密机械研究所 | Device and method for integrating fully-automatic diaphragm and shutter of area-array camera |
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| CN101477239A (en) * | 2009-01-16 | 2009-07-08 | 中国人民解放军国防科学技术大学 | Star sensor lens and its use method in large-temperature range accurate fixed star azimuth measurement |
| CN101820505A (en) * | 2010-05-06 | 2010-09-01 | 中国科学院西安光学精密机械研究所 | Large-viewing field space shooting device |
| CN201909932U (en) * | 2010-11-04 | 2011-07-27 | 北京天元四维科技有限公司 | Aviation digital camera fixing structure |
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