A sunshade light trapping device for star sensor ground test
A star sensor, ground test technology, applied in measuring devices, instruments, optics, etc., can solve problems such as stray light pollution, and achieve the effect of solving stray light pollution once
Active Publication Date: 2021-10-19
HARBIN INST OF TECH
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Problems solved by technology
[0003] In order to solve the problem of primary stray light pollution caused by the light beam emitted by the light source directly hitting the hood of the star sensor during the ground test of the existing star sensor, the present invention proposes a light trapping device for the hood of the star sensor for the ground test
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Embodiment
[0026] Embodiment: combine below Figure 1 to Figure 6 This embodiment will be described.
[0027] The light-trapping device of the shading cover for the ground test of the star sensor described in this embodiment includes a housing, an aperture 1 and a stray light absorbing unit;
[0028] The housing is a rectangular body without a rear panel, and a light entrance 3 is provided on the front panel 2 of the housing;
[0029] The aperture 1 is set on the front panel 2 of the casing, the star sensor hood 4 is set in the casing, the aperture 1, the light entrance 3 and the star sensor hood 4 are arranged coaxially, the star sensor hood 4 The front end surface is coplanar with the outer surface of the housing front panel 2;
[0030] The aperture of diaphragm 1 is equal to the inner diameter of the front opening end of star sensor light shield 4, and the diameter of light entrance 3 is greater than the inner diameter of the front opening end of star sensor light shield 4;
[0031...
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A light-trapping device for a light hood for ground testing of a star sensor, belonging to the technical field of stray light suppression, which solves the problem of primary stray light caused by the light beam emitted by the light source directly hitting the light hood of the star sensor during the ground test of the existing star sensor. Light pollution problem. The light trapping device: the housing is a rectangular body without a rear panel, and a light entrance is provided on the front panel of the housing. The aperture is set on the front panel of the shell, the star sensor hood is set in the shell, the aperture, the light inlet and the star sensor hood are coaxially arranged, the front surface of the star sensor hood is in contact with the shell front panel coplanar outer surfaces. The inner diameter of the front opening end of the star sensor hood is equal to the aperture of the diaphragm and smaller than the diameter of the light entrance. The large end of the conical structure is open and the small end is closed, and the open ends of a plurality of conical structures are densely arranged on the top plate, left side plate and right side plate of the casing. Matt black paint is applied to the outer surface of the housing, the frame of the diaphragm, and the inner and outer surfaces of the cone structure.
Description
technical field [0001] The invention relates to a light trapping device and belongs to the technical field of stray light suppression. Background technique [0002] During the ground test of the star sensor, the light beam emitted by the light source will be scattered or diffracted when it hits the light-blocking ring, side wall and the surface of the surrounding structure of the star sensor hood. The formed scattered light or diffracted light will cause stray light pollution to the test background area of the star sensor, and then affect the energy distribution at the image surface of the star sensor and the measurement accuracy of the extinction ratio of the star sensor hood. However, there is currently no effective technical means to solve the problem of primary stray light pollution caused by the light beam emitted by the light source directly hitting the hood of the star sensor. Contents of the invention [0003] In order to solve the problem of primary stray light...
Claims
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IPC IPC(8): G01C25/00G02B5/00
CPCG01C25/00G02B5/003
Inventor 汪洪源王秉文武少冲颜志强刘祥康文魏政
Owner HARBIN INST OF TECH