Wide-field coaxial spherical four-reflector optical system
A technology of reflective optics and spherical mirrors, applied in the field of optical instruments, can solve problems such as difficulty in meeting the requirements of larger field of view, failure to meet space optical requirements, unfavorable system installation and use, etc., to reduce the difficulty of processing and adjustment, processing Reduced installation costs and the effect of a large market
Inactive Publication Date: 2012-07-18
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology
However, there are still many problems in the existing large field of view reflective system: the coaxial reflective system has a small field of view, which cannot meet the needs of the large aperture and large field of view of the space optical system; although the off-axis reflective system has a large field of view , but it is difficult to process and adjust, which is not conducive to the installation and use of the system
[0003] The domestic patent similar to this invention is CN200810018151.4. This system has a field of view of 11.6° in the x direction and 1° in the y direction. The field of view is relatively small, and it is difficult to meet the requirement for a larger field of view.
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[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0022] Example figure 1 As shown, the present invention will be mainly applied to ultraviolet, visible light and infrared multi-band imaging. It can be widely used in fields such as observation and search.
[0023] Such as figure 1 As shown, a kind of large field of view coaxial spherical four-reflection optical system of the present invention comprises: refractive power is negative spherical mirror (1), refractive power is positive spherical mirror (2), spherical mirror ( 3), a spherical reflector (4) and a detector image surface (5); in the direction of light propagation, each optical element is arranged in sequence.
[0024] In the embodiment, the light emitted by the target at infinity passes through the above optical elements sequentially and then irradiates onto the detector element to obtain the final image.
[0025] In the embodiment, the sp...
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The invention relates to a wide-field coaxial spherical four-reflector optical system and belongs to the technical field of optical instruments. The system comprises a coaxial spherical four-reflector imaging system and a detector image surface. According to the system, a spherical reflector with negative focal power and a spherical reflector with positive focal power are adopted to form a reverse telephoto structure to enlarge a view field; and two spherical reflectors are additionally added to carry out aberration correction. The system disclosed by the invention has high imaging quality and a simple structure, is simple to process, can reach the large view field (18 degrees in the x direction and 8 degrees in the y direction), and can be widely suitable for the field of ultraviolet, visible light and infrared multi-band imaging.
Description
technical field [0001] The invention belongs to the technical field of optical instruments, and relates to a coaxial spherical four-reflection optical system with a large field of view, which is especially suitable for multi-band imaging of ultraviolet, visible light and infrared. Background technique [0002] Compared with the traditional transmissive optical system, the reflective imaging optical system has the characteristics of light weight, large aperture, simple structure, etc. It can clearly image objects at infinity, and has a wide range of applications in aerospace detection. However, there are still many problems in the existing large field of view reflective system: the coaxial reflective system has a small field of view, which cannot meet the needs of the large aperture and large field of view of the space optical system; although the off-axis reflective system has a large field of view , but the processing and adjustment are more difficult, which is not conduciv...
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IPC IPC(8): G02B17/06
Inventor 常军魏阿满曹娇张利飞欧阳姣李荣沈本兰
Owner BEIJING INSTITUTE OF TECHNOLOGYGY