Design And Imaging Quality Analysis Of Wolter X-ray Imaging System

In the latest years, X-ray imaging technology has developed fast in order to meet the need of X-ray photo-etching, spatial exploration technology, high-energy physics, procedure diagnosis of inertial confinement fusion (ICF) etc. Since refractive index of materials in the X-ray region is lower than 1, and X-ray is strongly absorbed by the materials, it is very difficult to image objects in the X-ray region. Conventional imaging methods are hardly suitable to X-ray range. Generally, grazing reflective and coding aperture imaging methods have been adopted more and more. This paper describes the development of Wolter I X-ray grazing incidence imaging system, mainly discusses the process of the design of Wolter I telescope, analyses the aberrations and presents the evaluation of imaging quality. Because of the particular structure of grazing incidence imaging system, the general optical design CAD is hardly suitable to this system, a more suitable optical computing program is created ,with which optical computing is performed. From the point of view of optical design, we make analysis of the structure, aberrations and imaging quality of Wolter type I telescope. We provide a large of computation data of Wolter type I telescope, and these data are the base for machining and mounting Wolter type I telescope. Analysis shows that Wolter system has no on axis aberration but has large coma, astigmatism and field curvature.