Metrology of LIGO core optics

Bozenko F. Oreb; David I. Farrant; Christopher J. Walsh; Achim J. Leistner; Frank J. Lesha; Philip S. Fairman; Carl M. Sona

doi:10.1117/12.357716

13 August 1999 Metrology of LIGO core optics

Bozenko F. Oreb, David I. Farrant, Christopher J. Walsh, Achim J. Leistner, Frank J. Lesha, Philip S. Fairman, Carl M. Sona

Author Affiliations +

Proceedings Volume 3744, Interferometry '99: Techniques and Technologies; (1999) https://doi.org/10.1117/12.357716
Event: International Conference on Optical Metrology, 1999, Pultusk Castle, Poland

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.

Citation Download Citation

Bozenko F. Oreb, David I. Farrant, Christopher J. Walsh, Achim J. Leistner, Frank J. Lesha, Philip S. Fairman, and Carl M. Sona "Metrology of LIGO core optics", Proc. SPIE 3744, Interferometry '99: Techniques and Technologies, (13 August 1999); https://doi.org/10.1117/12.357716

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