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Patent

Secondary mirror light shield used for space large aperture camera

Luo Shikui, +8 more
TLDR
In this paper, a secondary mirror light shield is used for a space large aperture camera, which consists of a louver cover, a cone cover, and a bracket, which is used to shield interference beams between the main mirror and the secondary mirror of the camera.
Abstract: 
The invention discloses a secondary mirror light shield used for a space large aperture camera. The light shield comprises a louver cover, a cone cover and a bracket. The bracket is a hollow column-shaped frame body, and the louver cover is glued to the outer side of the bracket and used for shielding interference beams between the main mirror and the secondary mirror of the space large aperture camera. The cone cover is glued to the inner side of the bracket and used for shielding and absorbing the diffuse reflection stray light generated by the internal structure of the space large aperturecamera. According to the invention, by gluing the louver cover and the cone cover on both sides of the bracket, the overall structure of the secondary mirror light shield is optimized and the defect that rigidity of the traditional secondary mirror light shield is weak is overcome; and by designing the configuration of the louver cover and the bracket, the shielding ratio of the secondary mirror light shield is reduced, and the problems that the conventional secondary mirror light shield is easily damaged and the processing precision is low are solved.

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Patent

Ultra-light stray light eliminating assembly suitable for coaxial micro-nano remote sensing camera

Zhu Yingbo, +3 more
TL;DR: In this article, an ultra-light stray light eliminating assembly for a coaxial micro-nano remote sensing camera is presented, which has the characteristics of light weight, simple structure, high stray light elimination effect and the like, and is excellent in mechanical property.
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Patent

Venetian blind type lens shade

Fan Xuewu, +2 more
TL;DR: In this paper, a shutter type light shield is provided with a group of light screens, the outer lateral surface of the inner light shielding barrel and the other side of the group of symmetrical light screens which are symmetrical are provided with the other group of the light screens.
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Cassegrain optical system shading assembly

Guang Jin, +5 more
TL;DR: In this article, a Cassegrain optical system shading assembly consisting of a primary mirror, an inner shading tube, four right trapezoid blades and at least two cylindrical sleeves is designed to restrain stray light.
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Super-shortened optic system lens hood

Mangzuo Shen, +2 more
TL;DR: In this paper, the authors proposed a utility model for an ultra-short optical system light shield, which can reduce one time scattering generated by visual field light ray which directly radiates a primary mirror, and reduce the constructional dimension of the light shield.