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Publication Citation: Measurements of the LIGO Pathfinder Optics

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Author(s): R E. Parks; Christopher J. Evans; P Sullivan; Lianzhen Shao; B Loucks;
Title: Measurements of the LIGO Pathfinder Optics
Published: November 01, 1997
Abstract: A number of 150 mm apertures in 250 mm diameter plano-concave optics with figure errors 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 results. 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 from the measurement aperture to a few mm.
Conference: LIGO
Proceedings: Proceedings of SPIE, Optical Manufacturing and Testing II, H. Philip Stahl, Editor
Volume: 3134
Pages: pp. 95 - 111
Location: San Diego, CA
Dates: July 27, 1997
Keywords: absolute testing,interferometry,LIGO,optical testing
Research Areas: Metrology, Manufacturing