Liquid-crystal light valves can have intensity-dependent resolution. We find for a nematic liquid-crystal light valve that this effect is well modeled as a phase that has been blurred by a linear space-invariant filter. The phase point-spread function is measured and is used in simulations to demonstrate that it introduces intermodulation products to the diffraction patterns of computer-generated Fourier transform holograms. Also, the influence of phase blurring on a pseudorandom-encoding algorithm is evaluated in closed form. This analysis applied to a spot array generator design indicates that nonlinear effects are negligible only if the diameter of the point-spread function is a small fraction of the pixel spacing.
© 2000 Optical Society of America
(030.6600) Coherence and statistical optics : Statistical optics
(070.2580) Fourier optics and signal processing : Paraxial wave optics
(100.3020) Image processing : Image reconstruction-restoration
(160.3710) Materials : Liquid crystals
(230.6120) Optical devices : Spatial light modulators
Markus Duelli, Li Ge, and Robert W. Cohn, "Nonlinear effects of phase blurring on Fourier transform holograms," J. Opt. Soc. Am. A 17, 1594-1605 (2000)