Share with Facebook
Tweet This
Post on reddit
Share with LinkedIn
Add to CiteULike
Add to Mendeley
Add to BibSonomyAbstract
We present a novel interferometric technique dedicated to the measurement of relative phase differences (pistons) and tilts of a periodically segmented wavefront. Potential applications include co-phasing of segmented mirrors of Keck-like telescopes as well as coherent laser beam combining. The setup only requires a holes mask selecting the center part of each element, a diffracting component, and a camera. Recorded interferogram is made of many subareas with sinusoidal fringe pattern. From each pattern, piston is extracted from fringe shift and tilts from fringe frequency and orientation. The pattern analysis is simple enough to enable kilohertz rate operation. The ambiguities are solved by a two-wavelength measurement. This technique is compatible with a very high number of elements and can be operated in the presence of atmospheric turbulence.
© 2016 Optical Society of America
Full Article | PDF ArticleOSA Recommended Articles
Maxime Deprez, Benoit Wattellier, Cindy Bellanger, Laurent Lombard, and Jérôme Primot
Opt. Express 26(5) 5212-5224 (2018)
Natalia Yaitskova, Kjetil Dohlen, Philippe Dierickx, and Luzma Montoya
J. Opt. Soc. Am. A 22(6) 1093-1105 (2005)
P. Wizinowich, B. McLeod, M. Lloyd-Hart, J. R. P. Angel, D. Colucci, R. Dekany, D. McCarthy, D. Wittman, and I. Scott-Fleming
Appl. Opt. 31(28) 6036-6046 (1992)