Broadband spectrum large aperture star sensor optical system

Abstract

The invention relates to a star sensor optical system with a fixed star as a reference system for navigation and location, in particular to a broadband spectrum large aperture star sensor optical system. The optical system is in a telephotograph type and comprises six lenses. The axes of the lenses are sequentially arranged on the same straight line. An aperture slot is formed in a first positive lens 1. Chromatic aberration revision is achieved through the fact that positive and negative lenses with large chromatic dispersion aberration are selected to glued and combined in an appropriate curvature mode. Meanwhile, special optical materials are adopted. A CaF2 crystal with low refractive index and low chromatic dispersion materials is selected to achieve secondary spectrum revision and apochromatism. The broadband spectrum large aperture star sensor optical system has good image quality, is capable of laying a solid foundation for the fact that a star sensor can achieve detection of fixed stars like high limiting stars, high fixed star acquisition probability and a signal-to-noise ratio, has the advantages of being small in size and light in weight, and meets the requirements for light weight of effective loads of an aircraft.

Description

technical field [0001] The invention belongs to the field of optical design, and relates to a star sensor optical system using stars as a reference system for navigation and positioning, in particular to a star sensor optical system with wide spectrum and large aperture. Background technique [0002] The star sensor is a high-precision space attitude measurement device with the star as the reference system and the starry sky as the working object. It is the most precise and least drifting attitude measurement component so far. It is often used for satellites, intercontinental strategic missiles, spacecraft, etc. Aerospace vehicles provide accurate spatial orientation and reference, and have the same ability of autonomous navigation as inertial gyroscopes, which have extremely important application value. [0003] In recent years, with the development of space technology, space missions have put more emphasis on scale, miniaturization and low cost. Future star sensors will de...

AI Technical Summary

Problems solved by technology

At present, the disadvantage of the domestic star sensor optical system is that the optical system adopted generally has a relatively small aperture and a narrow spectral range, resulting in low detection magnitude and weak detection ability, which is not conducive to the improvement of system attitude measurement

In addition, the size, weight, power consumption and cost of the current star sensor do not meet the requirements of the aircraft platform for the light weight and miniaturization of the optical payload. The existing star sensor camera is complex and huge.

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