No abstract

A blazed grating can be generated using a programmable liquid‐crystal television (LCTV) panel. Despite the effects of phase mismatch, phase quantization, and pixel addressing of the panel, optical beam steering is possible, particularly for small angle deflection applications. © 1994 John Wiley & Sons, Inc.

No abstract

The joint-transform power spectrum of two identical objects can be represented as a one-dimensional sinusoidal grating modulated by a Fourier transform, and the correlation peaks can be regarded as the first-order diffraction of the grating. The peak intensity and the width are then determined by the aperture and the modulation of the grating. Based on this analysis, it is shown that dc blocking, hard clipping, or binarization of the power spectrum results in higher correlation peak intensity and a narrower peak width. Direct-current blocking is also found to be preferable if the input pattern to the correlator is corrupted by noise.

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.