Simulation of an optical correlator configured as an imaging system using liquid crystal television spatial light modulators

• Main Author: Miller, Scot C.
• Other Authors: Powers, John P.
• Language: en_US
• Published: Monterey, California. Naval Postgraduate School 2013
• Online Access: http://hdl.handle.net/10945/32187

Electrical Engineering === This thesis models the complex transmittance effects of liquid crystal television spatial light modulators (SLMs) in an optical correlator configured as an imaging system. The computer model implements both the ideal transmittance and the nonlinear measured transmittance which is a function of the voltage applied across the pixel of the liquid crystal device. The system modeled included the effects of a nonlinear input SLM input but assumed an ideal filter SLM. Input waveforms included both one-dimensional and two-dimensional spatial cosines and chirped cosines. Results show that the effects of the SLM transmittance nonlinearity can be minimized by limiting the input signal voltages to values falling on a piecewise linear region of the transmittance operating characteristics.