Optical mask and solar sensor based on optical mask

Abstract

The invention discloses an optical mask. The optical mask is of a round rectangular structure composed of two parallel lines and two circular arc lines, wherein the round rectangular structure is symmetrical along the x-axis direction and the y-axis direction, and is provided with a V-shaped slit; the optical mask is used for filtering by two slits of the V-shaped slit and introducing a first solar ray and a second solar ray to a linear array image sensor. Therefore, by adopting the round rectangular structural form, the optical mask according to the embodiment of the invention is easy to process and assemble, and can prevent rotation and shifting; the V-shaped slit is adopted for filtering and introducing the solar rays, so that the number of formed light ray intersection points is small; in the subsequent posture angle measurement process, the corresponding information treatment algorithm is relatively simple, rapid and accurate.

Description

technical field [0001] The invention relates to the solar sensor technology in the aerospace field, in particular to an optical mask and a solar sensor based on the optical mask. Background technique [0002] The sun sensor is an important attitude measurement optical sensor on the satellite. According to the working principle, solar sensors can be mainly divided into the following types: analog solar sensors based on photoelectric cells, coded solar sensors based on photoelectric code discs, digital solar sensors based on two-dimensional line array image sensors, surface-based The area array digital solar sensor of the array image sensor and the linear array digital solar sensor based on the one-dimensional line array image sensor, etc.; among them, the linear array digital solar sensor is a newly emerging solar sensor, and its weight Lightweight, low power consumption, low cost, and moderate accuracy, it has become the first choice for low-cost, medium-to-low-precision mi...

AI Technical Summary

Problems solved by technology

[0007] 1) When the existing optical mask adopts a well-shaped or N-shaped pattern, the corresponding information processing algorithms in the subsequent measurement of the attitude angle are relatively complicated;

[0008] 2) If the existing optical mask adopts a circular structure, it is easy to produce rotational displacement during installation, which will bring a large error to the measurement of the subsequent attitude angle; if it adopts a rectangular structure, it will Complicated both in handling and assembly

[0009] 3) The assembly structure of the existing optical mask has high stability, but the flexibility is poor, it is not conducive to debugging, and the installation error is large

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