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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

Inactive Publication Date: 2004-09-01
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

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 radius of gyration of the "K mirror", which is used to drive the "K mirror" The driving mechanism of "K mirror" is huge, and the required rotational torque is also required to be large.

Method used

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  • Non image rotation 45 degree mirror scanning optical system
  • Non image rotation 45 degree mirror scanning optical system
  • Non image rotation 45 degree mirror scanning optical system

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Embodiment Construction

[0016] see first figure 1 , figure 1 It is a schematic diagram of the optical path structure of the best embodiment of the 45° mirror scanning optical system without image rotation of the present invention. As can be seen from the figure, the 45° mirror scanning optical system without image rotation of the present invention includes a 45° scanning mirror M1, a double-reflection optical convergence main system composed of a primary mirror M3 and a secondary mirror M2, and a K mirror along the direction in which the beam advances. The anti-image rotation system and the rear optical system are composed, wherein the rotation axis of the 45° scanning mirror M1 is the optical axis of the optical system, and the optical axes of the double reflection optical convergence main system, the K mirror anti-image rotation system and the rear optical system All coincide with the optical axis of the optical system, and the light entrance aperture of the double reflection optical convergence m...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B26/08G02B26/10
Inventor 张锷
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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