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System-level stray light test unit attenuator

A test unit, stray light technology, applied in the optical field, can solve the problems of dark target simulation, small occlusion and influence of background incident lighting, and achieve the effect of simple design

Active Publication Date: 2015-11-25
SHANGHAI SATELLITE ENG INST
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems existing in the above-mentioned prior art, the present invention provides a full-star stray light test unit deluster, which has less occlusion and influence on the background incident illumination, and solves the dark target simulation problem in the full-star stray light test

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  • System-level stray light test unit attenuator

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Embodiment Construction

[0017] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0018] Please also see figure 1 , figure 2 , image 3 . The whole star stray light test unit deluster of the present invention comprises: the black glass reflector 3 of outer cover 1, internal diaphragm 2 and central cone angle, internal diaphragm is between outer cover 1 and black glass reflector 3, a plurality of light The diaphragms are arranged at equal intervals, and the inner surface of the outer cover 1 and the surface of the inner diaphragm 2 are all coated with matting black paint wit...

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Abstract

The invention discloses a system-level stray light test unit attenuator which is mainly composed of an external cover (1), an internal diaphragm (2) and a black glass reflector (3) of a central taper angle. The internal diaphragm is arranged between the external cover and the black glass reflector. The internal surface of the external cover and the surface of the internal diaphragm are coated by high-absorptivity extinction black paint which is used for absorbing light rays entering the attenuator. Better extinction ratio can be achieved under the premise of minimizing shielding of optical load incident lighting so that dark object simulation in a system-level ground stray light test can be realized.

Description

technical field [0001] The invention relates to the field of optical technology, and more specifically, relates to a unit light extinction device for dark target simulation of star-level stray light ground test. Background technique [0002] Satellites operating in orbit, especially satellites operating in morning and evening orbits, due to the influence of sunlight, etc., have a large dynamic range of radiance within the payload field of view. Bright and dark targets exist simultaneously in the same payload field of view, and dark targets will be affected by Crosstalk effects of bright targets in multiple fields of view. The stray light verification method of the optical system based on the conventional "black spot method" cannot analyze the influence of the stray light caused by the satellite itself on the payload imaging. To suppress and verify stray light from the perspective of the whole star, it is necessary to propose a light extinguisher that can simulate dark targe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M11/02
Inventor 杨春燕汪少林程卫强田华崔伟程静马文佳毕建峰杨珺
Owner SHANGHAI SATELLITE ENG INST
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