Share Email Print
cover

Proceedings Paper

Study of the modulation capabilities of parallel aligned liquid crystal on silicon displays
Author(s): A. Márquez; F. J. Martínez; S. Gallego; M. Ortuño; J. Francés; A. Beléndez; I. Pascual
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Among the existent technologies of spatial light modulator devices, parallel aligned liquid crystal on silicon displays (PA-LCoS) have found wide acceptance. They are especially interesting since they provide phase-only modulation with no coupling of amplitude modulation. Optimal use of these devices requires proper calibration of their modulation capabilities in order to minimize some degradation effects found in the literature, such as flicker or anamorphic and frequency dependent modulation. In this work we apply calibration techniques developed in our lab, basically the classical linear polarimeter adapted to be able to take into account the existence of flicker. This method enables to obtain both the average retardance and a good estimation of the magnitude of the phase fluctuation when flicker is present. Various addressing formats are discussed and variations in the magnitude of the applied voltages are considered in order to amplify the retardance dynamic range and to enhance linearity in the device. Finally, two electrical configurations intended for phase-only and amplitude-mostly modulation regimes, useful e.g. in diffractive optics, are given.

Paper Details

Date Published: 26 September 2013
PDF: 9 pages
Proc. SPIE 8855, Optics and Photonics for Information Processing VII, 885504 (26 September 2013); doi: 10.1117/12.2023266
Show Author Affiliations
A. Márquez, Univ. de Alicante (Spain)
F. J. Martínez, Univ. de Alicante (Spain)
S. Gallego, Univ. de Alicante (Spain)
M. Ortuño, Univ. de Alicante (Spain)
J. Francés, Univ. de Alicante (Spain)
A. Beléndez, Univ. de Alicante (Spain)
I. Pascual, Univ. de Alicante (Spain)


Published in SPIE Proceedings Vol. 8855:
Optics and Photonics for Information Processing VII
Khan M. Iftekharuddin; Abdul A. S. Awwal; Andrés Márquez, Editor(s)

© SPIE. Terms of Use
Back to Top