Keywords

Liquid crystal spatial light modulator, Even pulse train transform, DC-biased square-wave basis, Incoherent scene spatial frequency analysis, Correlation-based optical filtering

Abstract

A liquid crystal spatial light modulator (SLM) was used as a programmable reticle in an optical system. The function of the SLM system was to perform a spatial frequency analysis on an incoherent input scene, by means of successive correlations over a set of spatial basis functions. Because of physical modulator characteristics, the basis function set available from the reticle was a set of DC-biased square waves, rather than the sinusoids used in a usual Fourier analysis. This led to the “even pulse train transform” being performed on the input images. Experimental examples of this frequency analysis are given for two sample scenes, a square aperture and a double slit aperture.

Notes

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Graduation Date

1987

Semester

Fall

Advisor

Boreman, Glenn

Degree

Master of Science (M.S.)

College

College of Engineering

Format

PDF

Pages

111 pages

Language

English

Rights

Public Domain

Length of Campus-only Access

None

Access Status

Masters Thesis (Open Access)

Identifier

DP0020594

Subjects

Light modulators; Optical correlators; Fourier transform optics; Optical data processing--Research; Liquid crystals--Optical properties

Accessibility Status

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