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Proceedings Paper

Ray-tracing technique incorporating finite element analysis for grazing incidence optics
Author(s): Thomas M. Casey; Jeffrey M. Steele; Robert R. Brearey; Richard A. Stark
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Paper Abstract

The paper describes a computer program, called AXAFIT, which carries out optical performance analyses of deformed Wolter Type-I X-ray optics. The program was developed to assist the NASA AXAF program. NASTRAN finite element analysis is employed to determine rigid body deflections and elastic deformations of optical elements. NASTRAN data are then matched with a geometric ray tracing routine by means of an interpolation technique. Encircled energy, rms spot diameter, geometric point spread function, and effective collecting area are predicted. The performance analysis of the AXAF Verification Engineering Test Article-I employs the results of this analytical technique. Verification test case results for simple rigid body misalignments and closed-form deformations are demonstrated to be satisfactory. AXAFIT is shown to be useful in conducting image quality analyses for these optical systems by means of NASTRAN-generated deflections.

Paper Details

Date Published: 1 October 1990
PDF: 14 pages
Proc. SPIE 1303, Advances in Optical Structure Systems, (1 October 1990); doi: 10.1117/12.21495
Show Author Affiliations
Thomas M. Casey, Eastman Kodak Co. (United States)
Jeffrey M. Steele, Eastman Kodak Co. (United States)
Robert R. Brearey, Eastman Kodak Co. (United States)
Richard A. Stark, Eastman Kodak Co. (United States)

Published in SPIE Proceedings Vol. 1303:
Advances in Optical Structure Systems
John A. Breakwell; Victor L. Genberg; Gary C. Krumweide, Editor(s)

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