CN103412392B - Switchover imaging photographic device and method - Google Patents
Switchover imaging photographic device and method Download PDFInfo
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- CN103412392B CN103412392B CN201310306806.9A CN201310306806A CN103412392B CN 103412392 B CN103412392 B CN 103412392B CN 201310306806 A CN201310306806 A CN 201310306806A CN 103412392 B CN103412392 B CN 103412392B
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Abstract
The invention relates to a switchover imaging photographic device which comprises an imaging photographic system which does not comprise light sensing devices, a micro lens array, switchover imaging photographic lenses and light sensing devices. The micro lens array is arranged on an imaging position of the imaging photographic system and fully covers an image plane of the imaging photographic system. Multiple sets of switchover imaging photographic lenses with different focal distances are arranged behind the micro lens array according to the principle that the focal distances of adjacent lenses are different and emitting light rays of the micro lens array are fully covered. The switchover imaging photographic lenses image the image plane of the imaging photographic system on the light sensing devices after the image plane is kept equal or amplified according to the geometry conjugation relationship. Each switchover imaging photographic lens corresponds to a light sensing device. Image stacking zones of all the light sensing devices are spliced and compounded to be an integral image. With the imaging photographic system, the micro lens array, the switchover imaging photographic lenses and the light sensing devices are combined to obtain an image which has equal or higher image quality and resolution and high geometric precision and a large complete image.
Description
Technical field
The invention belongs to optical image technology field, relate to one and utilize optics image image-forming principle, to ensure that former resolution is constant or reach more high resolving power, system image planes are carried out to the device of switching imaging camera.
Background technology
Now widely used high-resolution aerial photography camera is all adopt film as sensor devices, and the photosensitive area of its film is large, highly sensitive, is that digital camera can not be compared.But because the functional of digital camera system and actual effect are strong, can carry out graphical analysis and real-time Transmission to shooting image, be the development trend of current high-resolution aerial photography camera.Therefore, in order to reach the actual effect of the filming image of large picture, and utilizing former aeroplane photography equipment, just needing to carry out digital improvement to it.
At present there are following 2 problems in the process of aerial photographic camera transformation: 1, existing digital sensor devices does not possess and once completes 80mm × 80mm or more large-area photosensitive region, the sensor devices that area is larger simultaneously, its frame frequency speed is lower, cannot reach aerophotographic needs.2, existing aerial photographic camera is carried out to the numeral transformation of sensor, no matter be the seamless spliced technology adopting many CCD or cmos sensor, still imaging camera joining method is reduced (disclosed in 24 days October in 2007, patent publication No. is CN101059598A, name is called the Chinese patent of a kind of secondary imaging shooting method and device), all cannot meet the imaging region covering former aerial photographic camera completely, or not reduce the imaging resolution of former aerial photographic camera.This causes real effective aerial photographic camera digital improvement to realize.
Summary of the invention
Technology of the present invention is dealt with problems and is: overcome the deficiencies in the prior art, provide a kind of switching imaging camera method, imaging region can be reached while not reducing original aerial photographic camera imaging resolution to cover completely, thus obtain equal or higher picture element resolution, high geometric accuracy image and complete large format image.
Technical solution of the present invention is: a kind of switching imaging camera device, comprise the imaging camera system that does not comprise sensor devices, microlens array, switching imaging camera camera lens and sensor devices, wherein microlens array is arranged on the image space of imaging camera system and covers completely the image planes of imaging camera system, the many groups of switching imaging camera camera lenses with different focal are placed in the rear of described microlens array according to the principle that the switching imaging camera lens focus of adjacent position is not identical and cover completely the emergent ray of microlens array, switching imaging camera camera lens is large or image in sensor devices place after amplifying by the image planes of imaging camera system etc. according to geometry conjugate relation, the corresponding sensor devices of each switching imaging camera camera lens, splicing synthesis complete image is carried out in the image overlapping region of all sensor devices, in described microlens array, single lenticular minimum area is less than or equal to the pixel area of sensor devices.
Described switching imaging camera camera lens becomes matrix to arrange, and quantity is m × n, when m and n is less than or equal to 2, at least uses the switching imaging camera camera lens with two groups of different focal; When m and n is more than or equal to 2 and asynchronously equals 2, use the switching imaging camera camera lens with more than four groups or four groups different focal.
A kind of switching imaging camera method, step is as follows:
(1) an imaging camera system not comprising sensor devices is set imaging is carried out to target;
(2) microlens array is set at the image space of described imaging camera system, described microlens array should ensure to cover completely the image planes of imaging camera system, and in microlens array, single lenticular minimum area is less than or equal to the pixel area of the sensor devices at rear;
(3) multiple switching imaging camera camera lens is set at the rear of described microlens array and the emergent ray of microlens array is covered completely, described switching imaging camera camera lens has the different focal length of many groups and the focal length of the switching imaging camera camera lens of adjacent position is not identical, switching imaging camera camera lens according to geometry conjugate relation by large or imagings after amplifying such as the image planes of imaging camera system;
(4) arrange corresponding sensor devices at the image space place of each switching imaging lens, the corresponding sensor devices of each switching imaging camera camera lens, splicing is carried out in the image overlapping region of all sensor devices, synthesizes complete target image.
The present invention's advantage is compared with prior art:
(1) the invention provides a kind of switching imaging camera method not changing over the resolution of picture camera chain, can realize not being lowered into picture camera chain resolution and ensureing large format imaging camera.Adopt and add switching imaging camera system at imaging camera system focal plane rear, switching imaging is carried out to original system image planes, reduce the cost and technical requirement that adopt large face battle array sensor devices, improve the frame frequency of system simultaneously, ensure that the normal use of system;
(2) the present invention utilizes the switching imaging system of arranged in dislocation different focal in different planes, sensor devices in each switching imaging system is independent of each other and does not block, to ensure that the picture of former camera chain can equal proportion even amplification imaging, reach the object that ensure that imaging camera systemic resolution;
(3) the present invention adopts the switching imaging camera system and device of varying number, different focal according to demand, realizes the imaging process that large format covers completely;
(4) present invention achieves the aerial photographic camera digital improvement of large format, high frame rate, solve the situation of reduction resolution imaging of the prior art and splicing obliterated data.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of imaging device of the present invention;
Fig. 2 is that the present invention transfers imaging camera image mosaic schematic diagram.
Embodiment
As shown in Figure 1, imaging device of the present invention comprises one not containing the imaging camera system of sensor devices, microlens array, many group switching imaging camera camera lenses and many group sensor devices devices.Put the principle of different focal switching imaging camera camera lens according to adjacent position, the switching imaging camera camera lens many groups with different focal is placed in the rear of imaging camera system successively, and ensures to cover completely the image planes of imaging camera system.According to geometry conjugate relation, by the image planes of imaging camera system etc., large or amplification imaging, in sensor devices place, and ensures that the primary optical axis of switching light path is parallel with the primary optical axis of former imaging camera system to switching imaging camera camera lens.
The size of microlens array should cover the image planes of whole imaging camera system, and single lenticular minimum area is less than or equals the pixel area of rear sensor devices simultaneously.
Switching imaging camera camera lens and sensor devices need corresponding coupling, according to the imaging region size of imaging camera system, can increase or reduce transfer imaging camera camera lens and the quantity of sensor devices and the area of microlens array.
Be placed in different planes according to different focal switching imaging camera camera lens with the sensor devices dislocation matched, the zones of different of switching imaging camera camera lens to imaging camera system image planes carries out imaging, the picture of adjacent area possesses certain overlapping region, carries out splicing synthesis complete image according to overlapping region.
Switching imaging camera camera lens has the different focal of many groups, according to the interlaced principle not producing Steric clashes of adjacent switching imaging camera camera lens, when the quantity of switching imaging camera camera lens is m × n, when wherein m and n is less than or equal to 2, system at least uses the switching imaging camera camera lens with two groups of different focal; Wherein m and n is more than or equal to 2, and when equaling 2 when both are different, system at least needs to adopt the switching imaging camera camera lens with more than four groups or four groups different focal.
When adopting above-mentioned switching imaging camera device to carry out imaging, method step is as follows:
(1) arrange one do not comprise imaging camera system, microlens array, many group switching imaging camera camera lens of sensor devices and organize sensor devices device more.
(2) microlens array is arranged on the image space of imaging camera system.
(3) put the principle of different focal switching imaging camera camera lens according to adjacent position, the switching imaging camera camera lens many groups with different focal is placed in the rear of imaging camera system successively, and ensures to cover completely the image planes of imaging camera system.
(4) according to geometry conjugate relation, by the image planes of imaging camera system etc., large or amplification imaging, in sensor devices place, and ensures that the primary optical axis of switching light path is parallel with the primary optical axis of former imaging camera system to switching imaging camera camera lens.
Embodiment
It was 3 × 3 (working as m=3, during n=3) for example is described with the quantity of imaging camera camera lens of transferring.
As shown in Figure 1, the present invention carries out by multiple switching imaging camera system with different focal the method that combines, and each switching imaging camera system is made up of the light-sensitive surface battle array device such as imaging camera camera lens and CCD, the CMOS corresponding with it of transferring.The focal plane picture of imaging camera system is through transferring imaging camera lens imaging on the devices such as the photosensitive area array CCD corresponding with it or CMOS.Different focal length switching imaging camera camera lenses carries out switching imaging to imaging camera system focal plane, often adjacent two switching imaging camera camera lenses are not in same plane, the devices such as each area array CCD or CMOS, without blocking, even improve resolution to ensure that switching imaging camera resolution of lens is constant.
As Fig. 2 be switching imaging camera image mosaic schematic diagram wherein f1, f2, f3 and f4 be the imaging region of relay system under four kinds of different focal, hatched example areas is overlaying graphics region.
If the image planes size 114mm × 114mm of imaging camera system, can select that the pixel dimension of supplying in the market is 5 μm, the detector of pixel count 7680 × 7680 carries out nine pieces of splicings.Adopt the optical system of four groups of different focal to be staggered installation of during switching imaging camera lens design, carry out secondary imaging to microlens array imaging, microlens array is of a size of 120mm × 120mm.According to the appearance integral size of sensor devices and the practicality of system, the operating distance arranging switching imaging camera camera lens is respectively 120mm, 160mm, 200mm, 240mm, utilize the relation formula between image, can calculate relevant work apart under optical system focal length be respectively: f1=30mm, f2=40mm, f3=50mm, f4=60mm.Nine pieces of available final picture size of detector splicing are 115mm × 115mm, and wherein overlapping region is of a size of 0.1mm.Utilize the inventive method to carry out switching imaging, can ensure that resolution of lens reaches 100lp/mm, effectively carry out digital improvement.
The content be not described in detail in instructions of the present invention belongs to the known technology of those skilled in the art.
Claims (4)
1. a switching imaging camera device, it is characterized in that: comprise the imaging camera system that does not comprise sensor devices, microlens array, switching imaging camera camera lens and sensor devices, wherein microlens array is arranged on the image space of imaging camera system and covers completely the image planes of imaging camera system, the many groups of switching imaging camera camera lenses with different focal are placed in the rear of described microlens array according to the principle that the switching imaging camera lens focus of adjacent position is not identical and cover completely the emergent ray of microlens array, switching imaging camera camera lens is large or image in sensor devices place after amplifying by the image planes of imaging camera system etc. according to geometry conjugate relation, the corresponding sensor devices of each switching imaging camera camera lens, splicing synthesis complete image is carried out in the image overlapping region of all sensor devices, in described microlens array, single lenticular minimum area is less than or equal to the pixel area of sensor devices.
2. one switching imaging camera device according to claim 1, it is characterized in that: described switching imaging camera camera lens becomes matrix to arrange, quantity is m × n, when m and n is less than or equal to 2, at least uses the switching imaging camera camera lens with two groups of different focal; When m and n is more than or equal to 2 and asynchronously equals 2, use the switching imaging camera camera lens with more than four groups or four groups different focal.
3. a switching imaging camera method, is characterized in that step is as follows:
(1) an imaging camera system not comprising sensor devices is set imaging is carried out to target;
(2) microlens array is set at the image space of described imaging camera system, described microlens array should ensure to cover completely the image planes of imaging camera system, and in microlens array, single lenticular minimum area is less than or equal to the pixel area of the sensor devices at rear;
(3) multiple switching imaging camera camera lens is set at the rear of described microlens array and the emergent ray of microlens array is covered completely, described switching imaging camera camera lens has the different focal length of many groups and the focal length of the switching imaging camera camera lens of adjacent position is not identical, switching imaging camera camera lens according to geometry conjugate relation by large or imagings after amplifying such as the image planes of imaging camera system;
(4) arrange corresponding sensor devices at the image space place of each switching imaging lens, the corresponding sensor devices of each switching imaging camera camera lens, splicing is carried out in the image overlapping region of all sensor devices, synthesizes complete target image.
4. one switching imaging camera method according to claim 3, it is characterized in that: described switching imaging camera camera lens becomes matrix to arrange, quantity is m × n, when m and n is less than or equal to 2, at least uses the switching imaging camera camera lens with two groups of different focal; When m and n is more than or equal to 2 and asynchronously equals 2, use the switching imaging camera camera lens with more than four groups or four groups different focal.
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| CN110913091B (en) * | 2019-11-29 | 2024-01-23 | 威海华菱光电股份有限公司 | Image scanning system |
| CN114518174A (en) * | 2022-02-18 | 2022-05-20 | 中国科学院上海技术物理研究所 | Seamless splicing method based on three lenses and area array detector |
| CN115629076A (en) * | 2022-09-27 | 2023-01-20 | 威海华菱光电股份有限公司 | Array type image detection device |
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| CN102692791A (en) * | 2011-03-25 | 2012-09-26 | 卡西欧计算机株式会社 | Image capturing device with micro-lens array |
| CN102866480A (en) * | 2012-09-29 | 2013-01-09 | 北京空间机电研究所 | Large view field optical imaging system based on computing imaging technology |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102692791A (en) * | 2011-03-25 | 2012-09-26 | 卡西欧计算机株式会社 | Image capturing device with micro-lens array |
| CN102866480A (en) * | 2012-09-29 | 2013-01-09 | 北京空间机电研究所 | Large view field optical imaging system based on computing imaging technology |
Non-Patent Citations (2)
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| OpenGL虚拟相机模拟摄影测量二次成像;宋碧波 等.;《测绘通报》;20120731(第7期);21-23,56 * |
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