CN103412392A - Switchover imaging photographic device and method - Google Patents
Switchover imaging photographic device and method Download PDFInfo
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- CN103412392A CN103412392A CN2013103068069A CN201310306806A CN103412392A CN 103412392 A CN103412392 A CN 103412392A CN 2013103068069 A CN2013103068069 A CN 2013103068069A CN 201310306806 A CN201310306806 A CN 201310306806A CN 103412392 A CN103412392 A CN 103412392A
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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 the optical image technology field, relate to a kind of optics image image-forming principle of utilizing, to guarantee that former resolution is constant or to reach more high resolving power, to the transfer device of imaging photography of system image planes.
Background technology
Now widely used high-resolution aerial photography camera is all to 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 functional and effective strong due to digital camera system, can carry out graphical analysis and real-time Transmission to photographic images, is the development trend of current high-resolution aerial photography camera.Therefore, for the actual effect of the filming image that reaches large picture, and utilize former aeroplane photography equipment, just need to carry out digital improvement to it.
In the process to the aerial photographic camera transformation, have at present following 2 problems: 1, existing digital sensor devices does not possess and once completes 80mm * 80mm or more large-area photosensitive region, the larger sensor devices of while area, its frame frequency speed is lower, can't reach aerophotographic needs.2, existing aerial photographic camera is carried out the numeral transformation of sensor, no matter be the seamless spliced technology that adopts many CCD or cmos sensor, still dwindle into picture photography joining method (as patent 101059598, a kind of secondary imaging shooting method and device), all can't meet the imaging region that covers former aerial photographic camera fully, or not reduce the imaging resolution of former aerial photographic camera.This causes real effectively 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, a kind of switching imaging method for imaging is provided, can when not reducing original aerial photographic camera imaging resolution, reach imaging region and cover fully, thereby 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, comprise an imaging camera chain that does not comprise sensor devices, microlens array, switching imaging phtographic lens and sensor devices, wherein microlens array is arranged on the image space of imaging camera chain and the image planes of imaging camera chain is covered fully, many groups of switching imaging phtographic lenses with different focal are placed in the rear of described microlens array and the emergent ray of microlens array are covered fully according to the not identical principle of switching imaging phtographic lens focal length of adjacent position, switching imaging phtographic lens according to how much conjugate relations by the image planes of imaging camera chain etc. large or amplify after image in the sensor devices place, the corresponding sensor devices of each switching imaging phtographic lens, the synthetic complete image of processing is spliced in the doubling of the image zone 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 phtographic lens becomes matrix to arrange, and quantity is m * n, when m and n are less than or equal to 2, uses at least the switching imaging phtographic lens with two groups of different focal; When m and n are more than or equal to 2 and while equaling 2 when different, use at least the switching imaging phtographic lens with four groups or four groups above different focal.
A kind of switching imaging method for imaging, step is as follows:
(1) an imaging camera chain that does not comprise sensor devices is set target is carried out to imaging;
(2) image space at described imaging camera chain arranges microlens array, described microlens array should guarantee the image planes of imaging camera chain are covered fully, and in microlens array, single lenticular minimum area is less than or equal to the pixel area of the sensor devices at rear;
(3) a plurality of switching imaging phtographic lenses are set at the rear of described microlens array and the emergent ray of microlens array is covered fully, the focal length of switching imaging phtographic lens that described switching imaging phtographic lens has focal length that many groups are different and adjacent position is not identical, switching imaging phtographic lens according to how much conjugate relations by the image planes of imaging camera chain etc. large or amplify after imaging;
(4) at the image space place of each switching imaging lens, corresponding sensor devices is set, the corresponding sensor devices of each switching imaging phtographic lens, processing is spliced in the doubling of the image zone of all sensor devices, synthetic complete target image.
The present invention's advantage compared with prior art is:
(1) the invention provides a kind of switching imaging method for imaging that does not change over the resolution of picture camera chain, can realize not being lowered into picture camera chain resolution and guarantee large format imaging photography.Employing adds switching imaging camera chain at imaging camera chain focal plane rear, to the imaging of transferring of original system image planes, reduced cost and the technical requirement of adopting large face battle array sensor devices, has improved simultaneously the frame frequency of system, has guaranteed the normal use of system;
(2) the switching imaging system of utilization of the present invention arranged in dislocation different focal in different planes, sensor devices in each imaging system of transferring is independent of each other and does not block, with the picture that guarantees former camera chain can equal proportion amplification imaging even, reach the purpose that has guaranteed imaging camera chain resolution;
(3) the present invention adopts the switching imaging camera chain device of varying number, different focal according to demand, realizes the imaging process that large format covers fully;
(4) the present invention has realized the aerial photographic camera digital improvement of large format, high frame frequency, has solved the situation of reduction resolution imaging of the prior art and splicing obliterated data.
The accompanying drawing explanation
Fig. 1 is the schematic diagram of imaging device of the present invention;
Fig. 2 is the present invention's imaging photographs splicing schematic diagram of transferring.
Embodiment
As shown in Figure 1, imaging device of the present invention comprises that one does not contain imaging camera chain, microlens array, many group switching imaging phtographic lenses of sensor devices and organizes the sensor devices device more.According to adjacent position, put the principle of different focal switching imaging phtographic lens, the many groups of switching imaging phtographic lenses with different focal are placed in to the rear of imaging camera chain successively, and guarantee the image planes of imaging camera chain are covered fully.According to how much conjugate relations, large or amplification imaging, in the sensor devices place, and guarantees that the primary optical axis of switching light path is parallel with the primary optical axis of former imaging camera chain to switching imaging phtographic lens by the image planes of imaging camera chain etc.
The size of microlens array should cover the image planes of whole imaging camera chain, and single lenticular minimum area is less than or equals the pixel area of rear sensor devices simultaneously.
Switching imaging phtographic lens and sensor devices need corresponding coupling, according to the imaging region size of imaging camera chain, can increase or reduce switching imaging phtographic lens and the quantity of sensor devices and the area of microlens array.
According to different focal switching imaging phtographic lens and the sensor devices dislocation be complementary, be placed in different planes, switching imaging phtographic lens carries out imaging to the zones of different of imaging camera chain image planes, the picture of adjacent area possesses certain overlapping region, splices and processes synthetic complete image according to overlapping region.
Switching imaging phtographic lens has the different focal of many groups, according to the interlaced principle that does not produce the space conflict of adjacent switching imaging phtographic lens, when the quantity of switching imaging phtographic lens is m * n, wherein m and n are less than or equal at 2 o'clock, and system is used the switching imaging phtographic lens with two groups of different focal at least; Wherein m and n are more than or equal to 2, and both equal at 2 o'clock when different, and system needs to adopt the switching imaging phtographic lens with four groups or four groups above different focal at least.
While adopting above-mentioned switching imaging camera to carry out imaging, method step is as follows:
(1) arranging one does not comprise imaging camera chain, microlens array, many group switching imaging phtographic lenses of sensor devices and organizes the sensor devices device more.
(2) microlens array is arranged on the image space of imaging camera chain.
(3) according to adjacent position, put the principle of different focal switching imaging phtographic lens, the many groups of switching imaging phtographic lenses with different focal are placed in to the rear of imaging camera chain successively, and guarantee the image planes of imaging camera chain are covered fully.
(4) according to how much conjugate relations, large or amplification imaging, in the sensor devices place, and guarantees that the primary optical axis of switching light path is parallel with the primary optical axis of former imaging camera chain to switching imaging phtographic lens by the image planes of imaging camera chain etc.
Embodiment
The quantity of switching imaging phtographic lens of take is worked as m=3 as 3 * 3(, during n=3) describe for example.
As shown in Figure 1, the present invention is the method combined by a plurality of switching imaging camera chains with different focal, and each switching imaging camera chain is comprised of switching imaging phtographic lens and the light-sensitive surface battle array devices such as CCD, CMOS corresponding with it.The focal plane picture of imaging camera chain is imaged on the devices such as the sensitization area array CCD corresponding with it or CMOS through switching imaging phtographic lens.Different focal length switching imaging phtographic lens is to the imaging of transferring of imaging camera chain focal plane, every adjacent two switching imaging phtographic lenses are not in same plane, the devices such as each area array CCD or CMOS are without blocking, to guarantee the constant resolution that even improves of switching imaging phtographic lens resolution.
As Fig. 2 for switching imaging photographs splicing 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 the picture overlapping region.
If the image planes size 114mm * 114mm of imaging camera chain, the pixel dimension that can select supply in the market is that the detector of 5 μ m, pixel count 7680 * 7680 carries out nine splicings.During the design of switching imaging phtographic lens, adopt the optical system of four groups of different focal to be staggered installation of, the microlens array imaging is carried out to secondary 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 that switching imaging phtographic lens is set is respectively 120mm, 160mm, 200mm, 240mm, utilize the relation formula between image, the optical system focal length that can calculate under the relevant work distance is respectively: f1=30mm, f2=40mm, f3=50mm, f4=60mm.Nine 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 imaging of transferring, can guarantee that resolution of lens reaches 100lp/mm, effectively carried out digital improvement.
The content be not described in detail in instructions of the present invention belongs to those skilled in the art's known technology.
Claims (4)
1. switching imaging camera, it is characterized in that: comprise an imaging camera chain that does not comprise sensor devices, microlens array, switching imaging phtographic lens and sensor devices, wherein microlens array is arranged on the image space of imaging camera chain and the image planes of imaging camera chain is covered fully, many groups of switching imaging phtographic lenses with different focal are placed in the rear of described microlens array and the emergent ray of microlens array are covered fully according to the not identical principle of switching imaging phtographic lens focal length of adjacent position, switching imaging phtographic lens according to how much conjugate relations by the image planes of imaging camera chain etc. large or amplify after image in the sensor devices place, the corresponding sensor devices of each switching imaging phtographic lens, the synthetic complete image of processing is spliced in the doubling of the image zone 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. a kind of switching imaging camera according to claim 1, it is characterized in that: described switching imaging phtographic lens becomes matrix to arrange, quantity is m * n, when m and n are less than or equal to 2, uses at least the switching imaging phtographic lens with two groups of different focal; When m and n are more than or equal to 2 and while equaling 2 when different, use at least the switching imaging phtographic lens with four groups or four groups above different focal.
3. switching imaging method for imaging is characterized in that step is as follows:
(1) an imaging camera chain that does not comprise sensor devices is set target is carried out to imaging;
(2) image space at described imaging camera chain arranges microlens array, described microlens array should guarantee the image planes of imaging camera chain are covered fully, and in microlens array, single lenticular minimum area is less than or equal to the pixel area of the sensor devices at rear;
(3) a plurality of switching imaging phtographic lenses are set at the rear of described microlens array and the emergent ray of microlens array is covered fully, the focal length of switching imaging phtographic lens that described switching imaging phtographic lens has focal length that many groups are different and adjacent position is not identical, switching imaging phtographic lens according to how much conjugate relations by the image planes of imaging camera chain etc. large or amplify after imaging;
(4) at the image space place of each switching imaging lens, corresponding sensor devices is set, the corresponding sensor devices of each switching imaging phtographic lens, processing is spliced in the doubling of the image zone of all sensor devices, synthetic complete target image.
4. a kind of switching imaging method for imaging according to claim 3, it is characterized in that: described switching imaging phtographic lens becomes matrix to arrange, quantity is m * n, when m and n are less than or equal to 2, uses at least the switching imaging phtographic lens with two groups of different focal; When m and n are more than or equal to 2 and while equaling 2 when different, use at least the switching imaging phtographic lens with four groups or four groups above different focal.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021103427A1 (en) * | 2019-11-29 | 2021-06-03 | 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2012205111A (en) * | 2011-03-25 | 2012-10-22 | Casio Comput Co Ltd | Imaging apparatus |
| CN102866480B (en) * | 2012-09-29 | 2014-08-27 | 北京空间机电研究所 | Large view field optical imaging system based on computing imaging technology |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021103427A1 (en) * | 2019-11-29 | 2021-06-03 | 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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