Daytime celestial body detecting device

Abstract

The invention relates to a daytime celestial body detecting device, which is characterized by mainly comprising a light shield, a symmetrical turn-back type optical system, an eight-shift light filterturntable, a linear polaroid turntable, a CCD camera and a corresponding mechanical structure. The daytime celestial body detecting device adopts a spectral filtering method and a polarization methodto detect target celestial bodies under a daytime cloudless sky background while having novelties, and improves the performance of detecting the daytime celestial bodies.

Description

technical field [0001] The invention belongs to the design field of optical detection instruments, and relates to a daytime star detection device. Background technique [0002] Generally speaking, people detect stars at night, but there are some stars that appear during the day, and it is difficult to detect such stars that appear during the day using ordinary detection methods. Therefore, it is more difficult to detect them. The main difference between daytime and nighttime star detection is the difference in the brightness of the background light. During the daytime, the signal of the target itself is very weak, while the signal generated by the sky background is strong, coupled with the influence of atmospheric scattering, absorption and turbulence, the contrast of the target is very poor, making it difficult to identify. The main difficulty in daytime star detection lies in the low contrast and low signal-to-noise ratio caused by the strong background. Therefore, in o...

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Problems solved by technology

[0009] However, for areas where the polarization degree of the sky background is very small, such as Babinet, Brewster, the neutral point of Arago and the area near the sun, the polarization degree of the target star and the sky background is not much different, so it is difficult to improve the signal-to-noise in this area than to achieve the purpose of detection

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