Vibration insensitive laser unequal path interferometer /LUPI/ test

Details Vibration insensitive laser unequal path interferometer /LUPI/ test Vibration insensitive laser unequal path interferometer /LUPI/ test

Jan 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979spie..192...93h&link_type=abstract

In: Interferometry; Proceedings of the Seminar, San Diego, Calif., August 29, 30, 1979. (A80-44308 19-35) Bellingham, Wash., Soc

Physics

Interferometers, Optical Properties, Paraboloid Mirrors, Stability Tests, Diffraction Patterns, Optical Paths, Test Facilities, Vibration Damping

Scientific paper

An optical test procedure has been designed for testing a 24 inch diameter segment of a 60 inch diameter, 10 m focal length parabolic mirror. The test was set up in a long room subjected to vibrations. A modification was made to a laser unequal path interferometer to allow the collimated reference beam to follow approximately the same path as the test beam so that the reference beam could pick up the same vibrations as the test beam. The test produced good quality fringes; the vibration effects were minimized to a point when turbulence effects became the limiting factor.

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