Focusing performance analysis method for grazing incidence optical system based on X-ray optical simulation

Abstract

The invention provides a focusing performance analysis method for a grazing incidence optical system based on X-ray optical simulation. The method fully considers characteristic information of X-ray photon energy and reflectivity, irons out a defect in the prior art that only single-energy X-ray photons are considered and the reflectivity is not considered, can achieve engineering actual condition closer to X-ray pulsar navigation apparatus, and improves the efficiency of X-ray optical simulation and analysis. The method can achieve the analysis of the focusing performance of an optical system under the conditions of thermal deformation, structural deformation or thermal-structural coupling deformation, and obtains the mean square root radiuses of a disc of confusion of the optical system, 100% energy concentration ratio and 50% energy concentration ratio under different conditions, thereby achieving the quantification of impact degree on the focusing performance of the optical system from different deformations, and providing support for the reliability design and optimization of a product.

Description

Technical field [0001] The invention relates to the technical field of spacecraft product design, in particular to a grazing incidence optical system focusing performance analysis method based on X-ray optical simulation. Background technique [0002] With the drive of military demand, resource detection and scientific exploration, X-ray pulsar navigation technology has been developed rapidly. X-ray pulsar navigator is the core load in this field, and its spatial resolution, time resolution, navigation accuracy and other performance indicators continue to improve. The improvement of navigator performance requirements also determines the stability of the optical system and supporting structure of the entire device Degree and size put forward more stringent requirements. At the same time, with the development of small satellite technology, the requirements for lightweight X-ray pulsar navigators have continued to grow. The design of the X-ray pulsar navigator involves multiple di...

AI Technical Summary

Problems solved by technology

[0004] Most of the existing X-ray optical simulation and evaluation methods still use the traditional optical simulation and evaluation methods for other wave bands (such as visible light, infrared, ultraviolet, etc.)

The relationship between the reflectivity of X-rays and the incident angle and X-ray energy is not considered, which will lead to two problems: (1) The existing optical simulation methods or commercial software can only analyze X-rays with a single energy each time, and cannot Considering the reflectivity information, for the Wolter-I X-ray telescope with a wide energy range of 0.1-10keV, the workload is huge, which seriously hinders the application in aerospace engineering

(2) The traditional optical evaluation method cannot really reflect the X-ray focusing performance, because for the wide-band X-ray, due to its continuity, the discrete simulation method is not conducive to engineering realization, and secondly, because the energy and The relationship between reflectivity, its focusing evaluation method cannot truthfully reflect the actual situation

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