Browsing by Author "Wilson, CL"

Now showing 1 - 2 of 2

Modulation transfer function of a liquid crystal spatial light modulator
(1999-11-01)
Hsieh, ML
;
Hsu, KY
;
Paek, EG
;
Wilson, CL
;
光電工程學系
The modulation transfer function (MTF) of a pixelated liquid crystal spatial light modulator (LC-SLM) has been derived as a function of the fill factor. Based on the formula, we have investigated the dependence of the MTF on the orientations and spatial frequency of the input patterns. Furthermore, we have proposed and demonstrated a method for improving the MTF of a LC-SLM. (C) 1999 Published by Elsevier Science B.V. All rights reserved.
Performance enhancement of a joint transform correlator using the directionality of a spatial light modulator
(1999-12-01)
Hsieh, ML
;
Paek, EG
;
Wilson, CL
;
Hsu, KY
;
光電工程學系
We observe that conventional electrically addressable spatial light modulators have different transfer functions along the fast (horizontal) and the slow (vertical) directions. We then propose to use the directionality of a spatial light modulator to increase the performance of a joint transform correlator. Our experimental results show that input space-bandwidth product of a joint transform correlator can be significantly increased by recording a hologram so that interference fringes run along the fast (horizontal) direction of a spatial light modulator. (C) 1999 Society of Photo-Optical Instrumentation Engineers. [S0091-3286(99)00412-2].