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Proceedings Paper

Diffractive method for measurement of coupled amplitude and phase modulation in spatial light modulators
Author(s): John L. McClain; Peter S. Erbach; Don A. Gregory; Francis T. S. Yu
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Paper Abstract

Interferometric techniques have been employed by a number of investigators to determine the phase modulating characteristics of popular spatial light modulators. The technique works well but requires the set-up and operation of a sensitive interferometer. A non-interferometric technique is presented for determining the phase modulating characteristics of spatial light modulators. Examining the far field diffraction pattern distribution for specific input functions allows the phase modulation to be calculated. The degree of phase modulation appears in the Fourier transform as an intensity modulation which can be measured. Results are compared with usual interferometric techniques for a liquid crystal based modulator.

Paper Details

Date Published: 15 March 1996
PDF: 9 pages
Proc. SPIE 2752, Optical Pattern Recognition VII, (15 March 1996); doi: 10.1117/12.235645
Show Author Affiliations
John L. McClain, Univ. of Alabama in Huntsville (United States)
Peter S. Erbach, Univ. of Alabama in Huntsville (United States)
Don A. Gregory, Univ. of Alabama in Huntsville (United States)
Francis T. S. Yu, The Pennsylvania State Univ. (United States)


Published in SPIE Proceedings Vol. 2752:
Optical Pattern Recognition VII
David P. Casasent; Tien-Hsin Chao, Editor(s)

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