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Proceedings Paper

Results of the calibration of interferometer transmission flats for the LIGO Pathfinder optics
Author(s): Robert Paul Bourgeois; Joann Magner; H. Philip Stahl
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Paper 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.

Paper Details

Date Published: 1 November 1997
PDF: 9 pages
Proc. SPIE 3134, Optical Manufacturing and Testing II, (1 November 1997); doi: 10.1117/12.295121
Show Author Affiliations
Robert Paul Bourgeois, Hughes Danbury Optical Systems, Inc. (United States)
Joann Magner, Hughes Danbury Optical Systems, Inc. (United States)
H. Philip Stahl, Hughes Danbury Optical Systems, Inc. (United States)

Published in SPIE Proceedings Vol. 3134:
Optical Manufacturing and Testing II
H. Philip Stahl, Editor(s)

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