Reflective type hook-face type lens hood for space remote-sensing camera and design method for reflective type hook-face type lens hood

Abstract

The invention discloses a reflective type hook-face type lens hood for a space remote-sensing camera and a design method for the reflective type hook-face type lens hood. The problem of low stray light restraining efficiency of the existing circular-barrel-shaped lens hood which adopts multiple planar type vane sheets is solved. The shell of the hook-face type lens hood adopts a circular-barrel-shaped structure; multiple uniformly-distributed hook-face type vane sheets are arranged in the interior of the lens hood shell; and the shapes of the multiple hook-face type vane sheets are all free hook faces. Through reasonable design on the shapes of the vane sheets, the stray light is reflected to the region outside the lens hood when the stray light enters the vane sheets, so that the secondary reflection or multiple times of reflection of the stray light in the lens hood can be reduced; the stray light restraining capability of the lens hood is improved; guarantee is provided for the imaging of the space remote-sensing camera; solid foundation is laid to the space remote-sensing camera for realizing high-precision weak-light signal detection; and compared with the prior art, the stray light restraining efficiency of the hook-face type lens hood is almost doubled proved by experiments.

Description

technical field [0001] The invention relates to the technical field of space remote sensing, in particular to a reflective curved-surface light shield for a space remote sensing camera and a design method thereof. Background technique [0002] The stray light of the space remote sensing camera mainly refers to the non-target light that reaches the detector, that is, the target light that reaches the image plane of the space remote sensing camera through an abnormal optical path, and generally comes from strong light outside the field of view, such as sunlight, earth atmosphere Light, etc., and the signal to be detected by the space remote sensing camera is often very weak. Once the outside stray light enters the optical system of the space remote sensing camera, it will inevitably have a certain impact on the imaging of the space remote sensing camera. Suppression of astigmatism is one of the key technologies of space optical remote sensors, especially high-precision space o...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of low stray light suppression efficiency existing in the barrel-shaped sunshade using multiple planar light-blocking rings, the present invention provides a reflective curved sunshade for a space remote sensing camera and its design method

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