A Static Star Simulator Projection Optical System

Abstract

The invention discloses a projection optical system of a static star simulator, which comprises a reading microscope, a lens barrel and a light source. The reading microscope is installed at the front end of the lens barrel, the light source is installed at the rear end of the lens barrel, and is self-contained in the lens barrel. A first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and a star reticle are arranged coaxially from the front end to the tail end in turn; the present invention utilizes different refractive indices and The positive and negative optical lenses of the dispersion coefficient are combined to eliminate spherical aberration and axial chromatic aberration; the star reticle is used to simulate a star map, and the light emitted by the light source passes through the light emitted from the star map target on the star reticle, and passes through the first reticle. After the first to seventh lenses are refracted, the star map is imaged to infinity to simulate the star map observed by the high-precision star sensor on-orbit. The influence of the fuselage can further improve the imaging accuracy, and the structure is simple, which is conducive to processing and assembly.

Description

technical field [0001] The invention belongs to the technical field of spacecraft calibration, in particular to a static star simulator projection optical system. Background technique [0002] When the spacecraft is running in space, the space attitude measurement instrument is used to capture and measure its flight attitude information. The star sensor is a high-precision space attitude measurement instrument widely used in space vehicles. It extracts the attitude of the vehicle by identifying stars at different positions in the celestial sphere. The star simulator, as the ground calibration equipment of the star sensor, has also received more and more attention. It is imminent to develop a large field of view high-precision star simulator that can meet the ground test of the star sensor. The static star simulator is mainly composed of the drive circuit , light source, star reticle, filter and optical system are composed of five parts. Among them, the main function of the...

AI Technical Summary

Problems solved by technology

[0003] In the current optical system, due to the offset of the image point center and system distortion, the imaging accuracy of the star point is not high, which affects the detection accuracy of the star sensor; It has a certain influence, and the performance of the adhesive will affect the stability of the glued lens

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