Optical payload external stray light suppression method based on ray tracing theory

A payload, ray tracing technology, applied in the direction of electrical digital data processing, special data processing applications, measurement devices, etc., can solve problems such as stray light and complex structure that cannot be fundamentally solved

Pending Publication Date: 2019-11-22
SHANGHAI SATELLITE ENG INST
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This device has a complex structure and cannot

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  • Optical payload external stray light suppression method based on ray tracing theory
  • Optical payload external stray light suppression method based on ray tracing theory
  • Optical payload external stray light suppression method based on ray tracing theory

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Embodiment Construction

[0031] 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 for those of ordinary skill in the art, several changes and improvements can be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0032] Such as figure 1 As shown, an optical payload external stray light suppression method based on ray tracing theory includes the following steps:

[0033] Step 1: Establish a preliminary satellite model. The preliminary satellite model provides a design model through the sub-systems and load units of the real product platform of the satellite. The contours of the satellite platform and each optical load are consistent with the real product status;

[0034] Step 2: Import the built satell...

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Abstract

The invention provides an optical payload external stray light suppression method based on a ray tracing theory in the field of stray light suppression. The method comprises the following steps: step1, importing a built satellite preliminary model into ray tracing software; step 2, setting characteristic parameters of a star catalogue material, and establishing characteristics of an external radiation source; step 3, completing light tracing, and obtaining a stray light transmission path and a stray light transmission surface entering the interior of the optical payload; step 4, calculating an observation field angle range of the optical payload; step 5, according to the incident angle of the stray light on the transmission surface, a step surface with an inclined angle is established onthe stray light transmission surface, and the stray light is completely reflected out of the observation field angle range of the optical payload; and step 6, repeating the steps 1 to 5, and iteratingfor multiple times until all stray light is reflected out of the observation field angle range of the optical payload. The method is simple, and stray light caused by reflection or scattering of light through the surface of the satellite can be eliminated fundamentally.

Description

Technical field [0001] The invention relates to the field of stray light suppression, in particular to a method for suppressing external stray light of an optical payload based on ray tracing theory. Background technique [0002] The optical payload is very susceptible to stray light interference in orbit. Stray light not only affects the signal-to-noise ratio of the optical load, but also causes image data failure under certain time periods or lighting conditions, and even serious saturation of the optical load, resulting in loss of imaging capabilities . [0003] After the satellite is launched into orbit, sunlight or ground light directly shines on the satellite in the illuminated area, and it is likely to enter the payload observation field of view through reflection or scattering on the satellite surface, which affects the image quality of the payload. For satellites equipped with highly sensitive optical payloads, in addition to matting measures such as light shields, extinc...

Claims

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Application Information

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IPC IPC(8): G06F17/50G01C21/02
CPCG01C21/025
Inventor 何军杨勇汪少林代海山赵维宁彭建涛
Owner SHANGHAI SATELLITE ENG INST
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