AXAF-I alignment test system autocollimating flat error correction

Timothy S. Lewis

doi:10.1117/12.212600

20 June 1995 AXAF-I alignment test system autocollimating flat error correction

Timothy S. Lewis

Proceedings Volume 2515, X-Ray and Extreme Ultraviolet Optics; (1995) https://doi.org/10.1117/12.212600
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

Abstract

The alignment test system for the AXAF-I high-resolution mirror assembly (HRMA) performs a double-pass Hartmann test, in which a beam of light emitted from the focus of the HRMA is reflected back through the HRMA by an autocollimating flat (ACF). Measurements of the displacement of the beam on its return to the focal plane can be used to determine the misalignment of the HRMA, and also some information about errors in the shapes of the HRMA mirrors. Beam displacements caused by imperfections in the ACF can be distinguished from those caused by the HRMA by taking measurements with the ACF in different positions. This paper shows how to use such measurements to calibrate the system to compensate for errors caused by the ACF. Simulated results based on measured ACF surface data are presented.

Citation Download Citation

Timothy S. Lewis "AXAF-I alignment test system autocollimating flat error correction", Proc. SPIE 2515, X-Ray and Extreme Ultraviolet Optics, (20 June 1995); https://doi.org/10.1117/12.212600

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