Real-time correction of an optically aberrated wave front by use of a 10 × 10 ferroelectric liquid-crystal spatial light modulator as the correction device and a point-diffraction interferometer as the wave-front sensor is demonstrated. This type of interferometer requires no reference arm and so can be used, in theory, in an astronomical adaptive-optics system. We discuss some of the unusual features of the point-diffraction interferometer for wave-front sensing.
© 1998 Optical Society of America
(010.1080) Atmospheric and oceanic optics : Active or adaptive optics
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(160.3710) Materials : Liquid crystals
(230.6120) Optical devices : Spatial light modulators
Philip M. Birch, James Gourlay, Gordon D. Love, and Alan Purvis, "Real-Time Optical Aberration Correction with a Ferroelectric Liquid-Crystal Spatial Light Modulator," Appl. Opt. 37, 2164-2169 (1998)