NOAO testing procedures for large optics

Larry M. Stepp; Gary A. Poczulp; Earl T. Pearson; Nicolas A. Roddier

doi:10.1117/12.58045

26 March 1992 NOAO testing procedures for large optics

Larry M. Stepp, Gary A. Poczulp, Earl T. Pearson, Nicolas A. Roddier

Proceedings Volume 1618, Large Optics II; (1992) https://doi.org/10.1117/12.58045
Event: Optics Rochester: SPIE's International Symposium on Imaging, Fabrication, and Competitiveness, 1991, Rochester, NY, United States

Abstract

This paper describes optical testing procedures used at the National Optical Astronomy Observatories (NOAO) for testing large optics. It begins with a discussion of the philosophy behind the testing approach and then describes a number of different testing methods used at NOAO, including the wire test, full-aperture and sub-aperture Hartmann testing, and scatterplate interferometry. Specific innovations that enhance the testing capabilities are mentioned. NOAO data reduction software is described. Examples are given of specific output formats that are useful to the optician, using illustrations taken from recent testing of a 3.5- meter, f/1.75 borosilicate honeycomb mirror. Finally, we discuss some of the optical testing challenges posed by the large optics for the Gemini 8-meter Telescopes Project

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Larry M. Stepp, Gary A. Poczulp, Earl T. Pearson, and Nicolas A. Roddier "NOAO testing procedures for large optics", Proc. SPIE 1618, Large Optics II, (26 March 1992); https://doi.org/10.1117/12.58045

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