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25 August 1998 Dual-wavelength random-phase-shift interferometer for phasing large segmented primaries
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For active phasing of large segmented primary mirrors with thin, actively shaped controlled segments, we propose the use of a new, random phase-shift, dual wavelength, interferometric technique. We have considered a Michelson- type interferometer with diode lasers placed in the center of curvature of the primary, but another version employing a Mach-Zehnder interferometer with a pinhole in one arm placed in the telescope focal plane and using real or artificial star sources may also be considered. Results from a demonstration experiment are presented and discussed.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Kjetil Dohlen, Frederique Decortiat, Francois Fresneau, and Patrick Lanzoni "Dual-wavelength random-phase-shift interferometer for phasing large segmented primaries", Proc. SPIE 3352, Advanced Technology Optical/IR Telescopes VI, (25 August 1998);


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