Catadioptric long-focal-length large-view-field small-size imaging optical system

An imaging optics and long focal length technology, applied in optics, optical components, instruments, etc., can solve the problems of large back intercept, small field of view, and limited use, so as to reduce the system volume, increase the system focal length, and realize The effect of focal plane stitching
CN111487756AInactive Publication Date: 2020-08-04BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH
Publication Date
2020-08-04
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a catadioptric long-focal-length large-view-field small-size imaging optical system. The catadioptric long-focal-length large-view-field small-size imaging optical system comprises a front group positive-focal-power reflection type optical group and a rear group negative-focal-power transmission type optical group. The front group positive-focal-power optical system comprises a concave primary mirror reflector and a convex secondary mirror reflector; and the rear group negative-focal-power transmission type optical group is composed of a positive lens group, a negativelens group and a small focal power meniscus lens. An object imaging light beam is reflected by the concave primary mirror reflector and the convex secondary mirror reflector in sequence, then enters atransmission-type system, is refracted by the positive lens group, the negative lens group and the small focal power meniscus lens in sequence, and then is imaged on an image plane. In the invention,requirements of a high resolution, a large breadth range and a small size and weight of a space camera are met.
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Description

technical field

[0001] The invention belongs to the technical field of optical imaging systems, in particular to a catadioptric-based long focal length large field of view small volume imaging optical system. Background technique

[0002] With the increase of aerospace space exploration missions, the observation requirements and volume weight of aerospace cameras are also getting higher and higher. For example, the higher resolution of satellite imaging results in a focal length generally greater than 500mm, and the larger camera field of view needs to be 3°~ 6°, due to the increase in width requirements, the number of detectors has also changed from one piece to multi-piece splicing. At the same time, the requirements for camera weight and volume are becoming more and more stringent.

[0003] The existing implementation methods mainly include the following:

[0004] 1) A catadioptric system with no-refractive lens group is used, and a negative field lens is used to correc...

Claims

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