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Proceedings Paper

Design of liquid crystal Fresnel lens by uneven electric field
Author(s): Ichiro Fujieda; Masakatsu Tada; Fanny Rahadian
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Paper Abstract

We propose a liquid crystal Fresnel lens that consists of a liquid crystal layer sandwitched between two substrates, one of which a Fresnel lens-like structure is formed. Simulations on the liquid crystal orientations show that the retardation distribution of such a lens can mimic that of a spherical lens. The radius of the equivalent spherical lens can be varied by the bias across the liquid crystal layer. This may open a way to a thin variable-focus lens. As a preparation for building such a device, we have conducted preliminary experiments that involves modulated polymerization of polymer-network liquid crystal material by UV light exposure through a phase mask. A liquid crystal phase grating has been created by exposure through a prism sheet.

Paper Details

Date Published: 12 October 2006
PDF: 8 pages
Proc. SPIE 6375, Optomechatronic Sensors, Instrumentation, and Computer-Vision Systems, 637504 (12 October 2006); doi: 10.1117/12.688140
Show Author Affiliations
Ichiro Fujieda, Ritsumeikan Univ. (Japan)
Masakatsu Tada, Ritsumeikan Univ. (Japan)
Fanny Rahadian, Ritsumeikan Univ. (Japan)

Published in SPIE Proceedings Vol. 6375:
Optomechatronic Sensors, Instrumentation, and Computer-Vision Systems
Jonathan Kofman; Yasuhiro Takaya, Editor(s)

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