Measurements of the LIGO Pathfinder optics

Robert E. Parks; Christopher J. Evans; Paul J. Sullivan; Lianzhen Shao; Bryan E. Loucks

doi:10.1117/12.295122

1 November 1997 Measurements of the LIGO Pathfinder optics

Robert E. Parks, Christopher J. Evans, Paul J. Sullivan, Lianzhen Shao, Bryan E. Loucks

Proceedings Volume 3134, Optical Manufacturing and Testing II; (1997) https://doi.org/10.1117/12.295122
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

A number of 150 mm apertures in 250 mm diameter plano- concave with departures from the nominal figure of a few nm were carefully tested using phase measuring interferometry and the data reduced using pixel based absolute testing techniques. We discuss some of the data reduction techniques used as well as the precautions taken to verify the accuracy of the result. After accounting for systematic errors introduced by interferometer imaging, we show that the surfaces can be characterized to a few nm peak-to-valley over spatial scales form the measurement aperture to a few mm.

Citation Download Citation

Robert E. Parks, Christopher J. Evans, Paul J. Sullivan, Lianzhen Shao, and Bryan E. Loucks "Measurements of the LIGO Pathfinder optics", Proc. SPIE 3134, Optical Manufacturing and Testing II, (1 November 1997); https://doi.org/10.1117/12.295122

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