Piston and tilt interferometry for segmented wavefront sensing

被引：25
作者：
Deprez, M. [1 ,2 ]
Bellanger, C. [2 ]
Lombard, L. [2 ]
Wattellier, B. [1 ]
Primot, J. [2 ]
机构：
[1] Phasics SA, Batiment Explorer Parc Technol St Aubin, F-91190 St Aubin, France
[2] Off Natl Etud & Rech Aerosp, F-91761 Palaiseau, France
来源：
OPTICS LETTERS | 2016年 / 41卷 / 06期
关键词：
LATERAL SHEARING INTERFEROMETRY; TELESCOPES; ALGORITHM; ARRAY;
D O I：
10.1364/OL.41.001078
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
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. (C) 2016 Optical Society of America
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收藏
页码：1078 / 1081
页数：4
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