Phase modulation in a liquid‐crystal TV based joint transform correlator

Abstract

A phase‐encoded object has been modeled as the input to a joint transform correlator. The joint transform power spectrum is modeled as a binary phase object to calculate the correlation output. The results have been experimentally verified using a liquid‐crystal television operating in the phase modulation mode.

Wave‐front splitting interferometer for measurement of phase modulation

“…Double resonant elements such as concentric rings and Jerusalem crosses [4] give closer spacings by virtue of the upper resonance, which effectively pushes the transmission band of the high-pass FSS close to the lower rejection band to give a spacing that can be as small as 1.21. However, for most practical applications it is unlikely that this can be reduced further using single-layer devices, because normally a trade-off must be made between the width and spacing of the channels.…”