Light shield for optical remote sensor

Abstract

The invention relates to the technical field of sun shielding for a light inlet of a high-orbit space optical remote sensor, and specifically relates to a light shield for an optical remote sensor. The light shield comprises a light blocking ring assembly, an extension mechanism, a driving mechanism and an annular flexible wall. The light shield for the optical remote sensor is in a compressed state before a satellite enters the orbit, the walls of all stages of light blocking rings are in a folded state, the extension mechanism is unfolded stage by stage under the driving of the driving mechanism after the satellite enters the predetermined orbit, the extension mechanism drives the corresponding light blocking rings to be unfolded stage by stage, the walls between the light blocking ringsare unfolded accordingly, and thus the whole light shield for the optical remote sensor is gradually unfolded in orbit along the direction of an optical axis of a camera. The light shield can directly reflect the incident sunlight after being unfolded in orbit, can directly reflects part of the incident light out of the light shield, and can also move part of the incident light forward, thereby significantly weakening the thermal disturbance imposed on an optical system by the incident sunlight, and achieving good effects of stray light suppression and heat dissipation while avoiding the direct sunlight.

Description

technical field [0001] The invention relates to the technical field of sun shading at light inlets of high-orbit space optical remote sensors, in particular to a light shading cover for optical remote sensors. Background technique [0002] The optical remote sensor in geostationary orbit has the remarkable characteristics of wide visual range, long monitoring time, and fixed-point timing camera. In theory, it can cover most of the world's regions through a three-satellite network. All-weather survey capability. Due to the huge application prospects of high-orbit optical remote sensors in the fields of weather forecasting, environmental protection, and land survey, the development of high-orbit optical remote sensors has been started at home and abroad. For space optical remote sensors in geostationary orbit, it faces In the complex and alternating heat flow outside the space, the light entrance of the camera will be directly irradiated by the sun during nearly half of the o...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to overcome the technical defect that the existing shading hood cannot prevent the energy incident into the shading hood from still causing strong thermal disturbance to the optical system, and provides a device that can greatly reduce the thermal disturbance of the optical system caused by incident sunlight and avoid direct sunlight. At the same time, the optical remote sensor hood that achieves good stray light suppression and heat dissipation effect

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