A ray tracing technique incorporating finite element analysis for grazing incidence optics

Details A ray tracing technique incorporating finite element analysis for grazing incidence optics A ray tracing technique incorporating finite element analysis for grazing incidence optics

Oct 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990spie.1303...34c&link_type=abstract

IN: Advances in optical structure systems; Proceedings of the Meeting, Orlando, FL, Apr. 16-19, 1990 (A91-36651 15-74). Bellingh

Physics

Optics

Finite Element Method, Geometrical Optics, Grazing Incidence, Ray Tracing, Computer Programs, Nastran, X Ray Astrophysics Facility

Scientific paper

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.

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