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Proceedings Paper

Random phase errors and pseudorandom phase modulation of deformable mirror spatial light modulators
Author(s): Robert W. Cohn
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Paper 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.

Paper Details

Date Published: 12 January 1993
PDF: 9 pages
Proc. SPIE 1772, Optical Information Processing Systems and Architectures IV, (12 January 1993); doi: 10.1117/12.140923
Show Author Affiliations
Robert W. Cohn, Univ. of Louisville (United States)


Published in SPIE Proceedings Vol. 1772:
Optical Information Processing Systems and Architectures IV
Bahram Javidi, Editor(s)

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