Random phase errors and pseudorandom phase modulation of deformable mirror spatial light modulators

Robert W. Cohn

doi:10.1117/12.140923

12 January 1993 Random phase errors and pseudorandom phase modulation of deformable mirror spatial light modulators

Robert W. Cohn

Proceedings Volume 1772, Optical Information Processing Systems and Architectures IV; (1993) https://doi.org/10.1117/12.140923
Event: San Diego '92, 1992, San Diego, CA, United States

Abstract

Piston-only spatial light modulators, such as the flexure-beam deformable mirror device, hold great promise for real-time optical processors because of their ability to accurately match the phase of arbitrary laser images. Non-ideal devices may have uncontrolled phase errors which can limit performance. A statistical analysis has been developed which models the effect of random piston and tilt errors on the diffraction pattern of phase-only SLMs. A slight modification of these equations describes the performance of these SLMs in the phase-only correlator and the phase-only correlator modulated by pseudo-random sequences. Results on correlator diffraction efficiency versus amount of phase error are presented. For the specific case of a binary phase-only matched filter a diffraction efficiency of 40.5% is found.

Citation Download Citation

Robert W. Cohn "Random phase errors and pseudorandom phase modulation of deformable mirror spatial light modulators", Proc. SPIE 1772, Optical Information Processing Systems and Architectures IV, (12 January 1993); https://doi.org/10.1117/12.140923

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