Non image rotation 45 degree mirror scanning optical system

An optical system and image rotation technology, applied in the field of optical systems, can solve problems such as large rotational torque, large part size and radius of gyration, and huge driving mechanism, and achieve the effect of size reduction
CN1525202AInactive Publication Date: 2004-09-01SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
Publication Date
2004-09-01
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention is a rotary image-free 45-degree scan optical system, and it includes a 45-degree scanning mirror, double-reflecting optical converging primary system, K mirror rotary image eliminating system and after optical system, where the rotary axis of the 45-degree scanning mirror coincides with the optical axes of the other three systems, composing its optical axis. The primary reflector and the secondary reflector of the double-reflecting optical converging primary system are paraboloidal and hyperbolical mirrors, respectively. It can reduce the optical through aperture of K mirror by 10 times about, thus largely reducing the size of instrument. It is applied to spaceflight and military fields.
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Description

Technical field:

[0001] The invention relates to an optical system, in particular to a 45° mirror-scanning optical system without image rotation, which is mainly used in space-to-earth observation telescopes and also in the military field. Background technique:

[0002] The 45° scanning mirror is a commonly used scanning method for remote sensing optical instruments, but it will produce image rotation, which requires an anti-image rotation optical system. For wide-spectrum band imaging instruments, a reflective optical system is required, so a "K mirror" anti-rotation system can be used. The "K mirror" is composed of three mirrors arranged in a "K" shape, and it is activated simultaneously with the 45° scanning mirror and the rotation speed is half of that of the 45° scanning mirror. If the "K mirror" is directly placed behind the 45° scanning mirror, the light aperture of the "K mirror" must be consistent with the 45° scanning mirror, which leads to the large size and radi...

Claims

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