Wolter-I type X-ray optical reflective lens performance evaluation method

Abstract

The invention relates to a Wolter-I type X-ray optical reflective lens performance evaluation method, and belongs to the technical field of space optics, and the method comprises the following steps of step 1, selecting an optical reflective lens; step 2, dividing a slope error measurement mesh and a roundness error measurement mesh on the outer wall of the optical reflective lens; step 3, measuring the slope error hk, i, roundness error and actual radius rj; step 4, calculating the conversion slope error data h'k, i, and reconstructing a fitting mirror according to the slope error data; step5, establishing an incident ray from the parabolic main mirror into the optical reflection lens; step 6, determining the normal vector of the first reflection point a, a and the emission direction after the first reflection; step 7, determining the normal vector of the second reflection point b and the emission direction after the second reflection; and step 8, judging the performance of the optical reflective lens according to the distribution range of all focal points. The method provided by the invention is high in accuracy, small in calculation amount and high in efficiency.

Description

technical field [0001] The invention belongs to the technical field of space optics and relates to a Wolter-I type X-ray optical reflector performance evaluation method. Background technique [0002] X-ray pulsar navigation is suitable for fully autonomous navigation of spacecraft in near-Earth space, deep space exploration, and interstellar flight. It can provide comprehensive navigation information such as position, velocity, attitude, and time for most space mission spacecraft, and realize the navigation of spacecraft. Completely autonomous navigation has the advantages of strong reliability, good stability, high accuracy, and wide applicability. It is a new type of autonomous navigation technology with great development potential, and it has extremely important engineering practical value and strategic research significance. [0003] The core of the X-ray pulsar navigation sensor is the X-ray optical lens. As an X-ray optical lens with high angular resolution and strong...

AI Technical Summary

Problems solved by technology

Most of the traditional optical performance analysis methods are aimed at the ideal surface shape to verify the design, and cannot obtain the real optical performance of the lens; although some performance analysis methods take the surface shape error into account, they have poor accuracy and low efficiency, and do not target grazing incidence reflection. Optimizing the characteristics of the lens is not suitable for efficient, accurate and objective evaluation of the performance of Wolter-I X-ray optical mirrors

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