Adaptive focusing system and focusing method for fast imaging of spatial optical camera

Abstract

The invention relates to an adaptive focusing system and focusing method for fast imaging of a spatial optical camera. The adaptive focusing system comprises a main reflector temperature collection unit, a camera controller unit and a focusing mechanism unit, wherein the camera controller unit is connected with the main reflector temperature collection unit and the focusing mechanism unit. The adaptive focusing system solves the problem of out-of-focus judgment on a temperature change caused by a coaxial three-mirror carbon fiber optical system of the spatial optical camera, omits the processes of artificial out-of-focus judgment of downloaded data, out-of-focus amount calculation, focusing instruction injection and the like, achieves real-time closed-loop adjustment of a focal plane of the optical system of the camera and the camera temperature, solves the fast high-quality imaging problem under the condition of an unbalanced temperature after the spatial optical camera enters an orbit, and provides a technical support for fast imaging development of a spatial optical satellite of our country.

Description

technical field [0001] The invention belongs to the technical field of space optics, and in particular relates to an adaptive focusing system and a focusing method for rapid imaging of a space optics camera. Background technique [0002] The main function of space optical remote sensors is to obtain ground information from outer space, and the core of their space missions is to obtain clear and complete ground detailed survey and census images. At present, the application requirements of space optical cameras in various countries are becoming more and more extensive. Carbon fiber composite materials have the advantages of large specific stiffness, high specific modulus, good fatigue resistance, excellent vibration resistance, and good thermal stability, and are widely used in the structure of space optical remote sensing instruments. [0003] With the advancement of science and technology, people have higher and higher requirements for fast imaging of space optical cameras ...

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Problems solved by technology

[0006] In order to overcome the defects existing in the prior art, the purpose of the present invention is to solve the problem of fast and high-quality imaging of the space optical camera under the condition of temperature imbalance after it enters the orbit, and can effectively solve the problem of camera focusing requiring manual assistance, long focusing time, Discontinuity of defocus compensation, etc., propose an adaptive focusing system and focusing method for fast imaging of space optical camera

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