Nighttime light satellite camera profiled lens hood

Abstract

The invention relates to a nighttime light satellite camera profiled lens hood, belongs to the field of space optical technology, and aims to provide a nighttime light satellite camera profiled lens hood to solve the problem in the prior art that a stray light removing ability and the length and weight of are mutually restricted. The nighttime light satellite camera profiled lens hood comprises acone-shaped cover body and a plurality of light-blocking rings coaxially disposed on the inner wall of the cover body. The cover body and the light-blocking rings are integrally provided with a cutting surface from a large-sized end of the cover body to the side wall. An intersection angle between the cutting surface and the axis direction of the cover body is smaller than an intersection angle between a sun vector and the axial direction of the cover body. The nighttime light satellite camera profiled lens hood realizes the avoidance of the sun stray light by using one hood. Compared with a conventional lens hood, the profiled lens hood of the invention has a short length, a small volume and light weight. The profiled lens hood of the invention uses an oblique cutting design method, and has a good sun stray light shielding effect, and suppresses the influence of sunlight on the imaging of the nighttime light camera at the source.

Description

technical field [0001] The invention belongs to the technical field of space optics, and relates to a special-shaped shading cover of a luminous satellite camera that can avoid sunlight and is used for imaging in high-latitude regions. Background technique [0002] Night-light remote sensing is an active branch of remote sensing. It can obtain the visible light information emitted by the surface at night and in cloudless conditions, and most of this information is generated by human activities on the surface. For example, city lights, ship lights, and oil well burning light are all related to human activities; at the same time, marine life, forest wildfires, and volcanic eruptions in nature are also part of the luminous light source. [0003] At present, the sensor imaging time of most visible light remote sensing satellites is daytime, and only a small number of satellites have the ability to capture visible light on the surface at night. Satellites from the United States,...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to propose a special-shaped shading cover for a luminous satellite camera, which solves the problem of mutual constraints between the ability to eliminate stray light and length and weight in the prior art, realizes the avoidance of stray light from the sun when imaging in high latitude areas, and blocks the entry of sunlight Optical system, better solve the problem of night light camera stray light elimination

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