Imaging system based on double Gauss similar structure

An imaging system and Gaussian technology, applied in the field of photoelectric detection, can solve problems such as low capability and difficulty in realizing high-altitude long-distance imaging, and achieve the effect of increasing the detectable distance, realizing high-altitude long-distance imaging, and realizing large-scale continuous observation.

Active Publication Date: 2020-01-17
XIDIAN UNIV
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  • Description
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  • Application Information

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Problems solved by technology

However, when the system needs a large focal length to achieve long-distance imaging, the size of the ball lens will exceed the upper limit of the existing processing technology, making it difficult to achieve high-altitude long-distance imaging
[0006] To sum up, the existing large-field imaging system has low ability to realize large-scale energy collection and small-scale high-resolution sub-field imaging at the same time, and it is difficult to realize high-altitude and long-distance imaging

Method used

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  • Imaging system based on double Gauss similar structure
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  • Imaging system based on double Gauss similar structure

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Embodiment 1

[0036] See figure 1 , figure 1 This is a schematic structural diagram of an imaging system based on a dual-Gauss-like structure provided by an embodiment of the present invention. The imaging system includes a primary imaging optical system 1 and a secondary imaging optical system 2.

[0037] The main imaging optical system 1 includes a lens with a similar double Gauss structure, which is used to image the observation field of view on the spherical primary image surface, and correct the lateral chromatic aberration and astigmatism of the imaging during the imaging process, so that the various field of view positions of the spherical primary image surface The imaging quality is similar. Similar image quality means that the aberrations and distortions of each field of view position of the spherical primary image plane will not differ too much.

[0038] The double-Gauss-like lens in this embodiment can be a lens combination with a double-Gauss structure, or a lens combination with a ...

Embodiment 2

[0042] On the basis of the first embodiment, this embodiment describes the specific structure of the primary imaging optical system and the structure of the secondary imaging optical system in detail.

[0043] See Figure 2a-Figure 2c , Figure 2a-Figure 2c It is a schematic diagram of a design process of a main imaging optical system provided by an embodiment of the present invention. The main imaging optical system 1 is an important component of the wide field of view and high-resolution imaging system. The design process is: firstly select a symmetrical single-center objective lens A1, in which a spherical lens A2 containing the center of curvature forms a spherical lens Structure A, then insert an air gap B between the split halves of the concentric spherical lens, see Figure 2a ; By introducing air gap B, the radius of curvature of the system is optimized. Then, a lens element C is inserted between the air gap B and the image plane. The lens element C is located outside the...

Embodiment 3

[0064] On the basis of the second embodiment, this embodiment adopts image 3 with Figure 4 The formed imaging system is optimized according to the following design requirements: the focal length of the system is 115mm, which meets the needs of telephoto and long-distance imaging (about 7km), the imaging instantaneous field of view is 36°×36°, and the sensor is Sony IMX226. Pixel size 1.85μm×1.85μm, active pixel array 4000(H)×3000(V), effective photosensitive area 7.5mm(H)×5.55mm(V), about 12M pixels, frame rate 30fps; imaging band is visible light Band.

[0065] After optimization, the structural parameters of the main imaging optical system 1 are shown in Table 1, and the structural parameters of each sub-secondary imaging optical system 21 are shown in Table 2.

[0066] Surf:Type Radius Thickness Glass Semi-Diameter OBJ Infinity Infinity- Infinity 1227.82528.093 BSM93108.187 2525.34326.459103.430 3644.34027.033 D-ZK2L89.777 4112.81930.000 FPL5370.828 55.660E+00523.17368.9...

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Abstract

The invention relates to an imaging system based on a double Gauss similar structure, comprising: a main imaging optical system which comprises a double Gauss similar structure lens and is used for imaging an observation field on a spherical primary image surface, and correcting horizontal aberration and dispersion of the imaging; a secondary imaging optical system comprising a plurality of sub-secondary imaging optical systems, wherein the plurality of sub-secondary imaging optical systems are arranged behind the spherical primary image surface and distributed on a semi-sphere taking a centerposition of the main imaging optical system as the center of sphere, the secondary imaging optical system is used for dividing the spherical primary image surface into a plurality of sub-images and enabling field overlapping to exist between the adjacent sub-images, and correcting a residual aberration of the main imaging optical system. The imaging system of the invention is capable of effectively achieving wide-range continuous observation, and simultaneously acquiring detail information of an observation field object, so that conflict between wide-area imaging and high-resolution imaging can be solved, and a detectable distance can be increased, thereby achieving high altitude remote imaging.

Description

Technical field [0001] The invention belongs to the field of photoelectric detection, and specifically relates to an imaging system based on a similar double Gaussian structure. Background technique [0002] Multi-target wide-area reconnaissance and surveillance application scenarios such as border protection, sea area reconnaissance search and rescue, and capital protection put forward higher requirements for imaging systems with large field of view, high resolution, and high reconnaissance efficiency. The optical system is the direct factor that determines the imaging performance of the imaging system. Its structure directly affects the imaging resolution, field of view and aberrations, and affects the performance of large field of view and wide area target search and small field of view high-precision target recognition and tracking. . [0003] The existing high-altitude and large-field imaging adopts a photoelectric reconnaissance system and a scanning imaging mode, which take...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/00G02B27/58G02B13/00G01V8/10
CPCG01V8/10G02B13/006G02B27/0025G02B27/58
Inventor 刘飞赵小明杨思原冯位欣段景博马生存刘佳维
Owner XIDIAN UNIV
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