Ray-tracing technique incorporating finite element analysis for grazing incidence optics

Thomas M. Casey; Jeffrey M. Steele; Robert R. Brearey; Richard A. Stark

doi:10.1117/12.21495

1 October 1990 Ray-tracing technique incorporating finite element analysis for grazing incidence optics

Thomas M. Casey, Jeffrey M. Steele, Robert R. Brearey, Richard A. Stark

Proceedings Volume 1303, Advances in Optical Structure Systems; (1990) https://doi.org/10.1117/12.21495
Event: 1990 Technical Symposium on Optics, Electro-Optics, and Sensors, 1990, Orlando, FL, United States

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.

Citation Download Citation

Thomas M. Casey, Jeffrey M. Steele, Robert R. Brearey, and Richard A. Stark "Ray-tracing technique incorporating finite element analysis for grazing incidence optics", Proc. SPIE 1303, Advances in Optical Structure Systems, (1 October 1990); https://doi.org/10.1117/12.21495

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