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Proceedings Paper

Characterization of light scattering in nematic droplet-polymer films
Author(s): Naoki Kinugasa; Yuichi Yano; Akio Takigawa; Hideo Kawahara
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Paper Abstract

The optical properties of nematic droplet-polymer films were studied both in the on and off state using Lambert-Beer''s law to characterize their scattering phenomena. For the preparation of the devices, NCAP process was employed with the different diameter, distribution, shape, and density of nematic droplets. Their cell thickness and refractive indices concerning the birefringence of liquid crystals were also controlled. The results showed that the scattering phenomena of nematic droplet-polymer films were likely caused by two types of features. One, related to the surface area of nematic droplets, was the difference of the refractive indices in the interface between liquid crystals and polymer matrix. The other, related to the liquid crystal volume inside the nematic droplets, was the birefringence of liquid crystals. Considering such relations, the extinction coefficient of Lambert-Beer''s law could be described by the sum of the area in the interface multiplied by the difference of the refractive indices between two materials and the liquid crystal volume multiplied by their birefringence. Furthermore, it was found their parallel transmittance in the off state and haze ratio in the on state were well characterized by such extinction coefficient of Lambert-Beer''s law.

Paper Details

Date Published: 15 June 1992
PDF: 7 pages
Proc. SPIE 1665, Liquid Crystal Materials, Devices, and Applications, (15 June 1992); doi: 10.1117/12.60377
Show Author Affiliations
Naoki Kinugasa, Nippon Sheet Glass Co., Ltd. (Japan)
Yuichi Yano, Nippon Sheet Glass Co., Ltd. (Japan)
Akio Takigawa, Nippon Sheet Glass Co., Ltd. (Japan)
Hideo Kawahara, Nippon Sheet Glass Co., Ltd. (Japan)


Published in SPIE Proceedings Vol. 1665:
Liquid Crystal Materials, Devices, and Applications
Paul S. Drzaic; Uzi Efron, Editor(s)

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