We describe a binary approach to adaptive wave-front correction, especially suitable for narrow band applications, which would be simpler than conventional adaptive technology. Appropriate parts of the aberrant wave front are phase retarded by half a wavelength to ensure that none of the image-forming rays add together destructively. Simulations for monochromatic light show that the residual wave-front errors, in the absence of other errors, would result in Strehl ratios of ~40% with diffraction-limited widths at visible wavelengths. We simulate the imaging performance of such a system and describe a possible implementation that uses a ferroelectric liquid-crystal spatial light modulator.
© 1995 Optical Society of America
Gordon D. Love, Nigel Andrews, Philip Birch, David Buscher, Peter Doel, Colin Dunlop, John Major, Richard Myers, Alan Purvis, Ray Sharples, Andrew Vick, Andrew Zadrozny, Sergio R. Restaino, and Andreas Glindemann, "Binary adaptive optics: atmospheric wave-front correction with a half-wave phase shifter," Appl. Opt. 34, 6058-6066 (1995)