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Proceedings Paper

Application of an antiferroelectric liquid crystal cell as a self-aligning phase modulator
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Paper Abstract

In this study, we have examined the possibility of using an anti-ferroelectric liquid-crystal (AFLC) as a high speed phase modulator. The AFLC has the major advantage that it has three stable states in contrast to the ferroelectric liquid-crystal which has only two states. This feature permits the application of AFLC as a fast phase modulator in the phase shifting interferometer. However, AFLC also modulates the intensity of transmitted light as well as its phase. Based on theoretical analysis, it was found that doping a dichroic dye to AFLC cell can suppress the intensity modulation. Moreover, such a dye-doped AFLC phase modulator can perform as a self- align phase modulator. Such a self-align phase modulator permits a practically advantageous alignment-free optical system, for instance, in phase contrast microscope, point diffraction interferometer etc. Preliminary experiments were performed to demonstrate the validity of the dye-doped AFLC cell. Finally, we also examine the application of the dye- doped AFLC phase modulator to phase shifting interferometer.

Paper Details

Date Published: 7 May 1999
PDF: 5 pages
Proc. SPIE 3740, Optical Engineering for Sensing and Nanotechnology (ICOSN '99), (7 May 1999); doi: 10.1117/12.347822
Show Author Affiliations
Hirofumi Kadono, Saitama Univ. (Japan)
Satoru Toyooka, Saitama Univ. (Japan)

Published in SPIE Proceedings Vol. 3740:
Optical Engineering for Sensing and Nanotechnology (ICOSN '99)
Ichirou Yamaguchi, Editor(s)

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