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Proceedings Paper

Metrology of LIGO core optics
Author(s): Bozenko F. Oreb; David I. Farrant; Christopher J. Walsh; Achim J. Leistner; Frank J. Lesha; Philip S. Fairman; Carl M. Sona
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Paper Abstract

Core optical substrates for the Laser Interferometer Gravitational Wave Observatory are being manufactured and tested at CSIRO. These substrates are for use in long baseline Michelson interferometers with Fabry Perot cavities up to 4 km in length in each arm. The optics consist of 32 high quality fused silica substrates, comprising folding mirrors, end test masses, input test masses, recycling mirrors and beamsplitters. The dimensions of the substrates are 250 mm diameter by up to 100 mm thick. The optical surfaces are either flat or curved, with radii of curvature between 7 km and 15 km and tolerance bands on the radius equivalent to variations in sag (over 200 mm) of about 20 nm.

Paper Details

Date Published: 13 August 1999
PDF: 13 pages
Proc. SPIE 3744, Interferometry '99: Techniques and Technologies, (13 August 1999); doi: 10.1117/12.357716
Show Author Affiliations
Bozenko F. Oreb, CSIRO (Australia)
David I. Farrant, CSIRO (Australia)
Christopher J. Walsh, CSIRO (Australia)
Achim J. Leistner, CSIRO (Australia)
Frank J. Lesha, CSIRO (Australia)
Philip S. Fairman, CSIRO (Australia)
Carl M. Sona, CSIRO (Australia)

Published in SPIE Proceedings Vol. 3744:
Interferometry '99: Techniques and Technologies
Malgorzata Kujawinska; Mitsuo Takeda, Editor(s)

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