Diffractive method for measurement of coupled amplitude and phase modulation in spatial light modulators

John L. McClain Jr.; Peter S. Erbach; Don A. Gregory; Francis T. S. Yu

doi:10.1117/12.235645

15 March 1996 Diffractive method for measurement of coupled amplitude and phase modulation in spatial light modulators

John L. McClain Jr., Peter S. Erbach, Don A. Gregory, Francis T. S. Yu

Proceedings Volume 2752, Optical Pattern Recognition VII; (1996) https://doi.org/10.1117/12.235645
Event: Aerospace/Defense Sensing and Controls, 1996, Orlando, FL, United States

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.

Citation Download Citation

John L. McClain Jr., Peter S. Erbach, Don A. Gregory, and Francis T. S. Yu "Diffractive method for measurement of coupled amplitude and phase modulation in spatial light modulators", Proc. SPIE 2752, Optical Pattern Recognition VII, (15 March 1996); https://doi.org/10.1117/12.235645

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