Results of the calibration of interferometer transmission flats for the LIGO Pathfinder optics

Robert Paul Bourgeois; Joann Magner; H. Philip Stahl

doi:10.1117/12.295121

1 November 1997 Results of the calibration of interferometer transmission flats for the LIGO Pathfinder optics

Robert Paul Bourgeois, Joann Magner, H. Philip Stahl

Proceedings Volume 3134, Optical Manufacturing and Testing II; (1997) https://doi.org/10.1117/12.295121
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

To certify compliance with the exceptional surface figure requirements of the laser interferometer gravity observatory, Hughes Danbury Optical Systems developed a unique high-accuracy metrology capability consisting of a custom 12 inch phase-measuring interferometer and an absolute calibration algorithm. The interferometer was specifically designed to minimize systematic retrace, phase- modulation, and ghost reflection errors. The calibration algorithm extends existing three-flat methods by employing circular harmonic transforms. Using this capability, three flats were calibrated over a 200 mm clear aperture to an accuracy of better than (lambda) /1000 rms. Comparisons with published algorithms are presented.

Citation Download Citation

Robert Paul Bourgeois, Joann Magner, and H. Philip Stahl "Results of the calibration of interferometer transmission flats for the LIGO Pathfinder optics", Proc. SPIE 3134, Optical Manufacturing and Testing II, (1 November 1997); https://doi.org/10.1117/12.295121

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