Design of liquid crystal Fresnel lens by uneven electric field

Ichiro Fujieda; Masakatsu Tada; Fanny Rahadian

doi:10.1117/12.688140

12 October 2006 Design of liquid crystal Fresnel lens by uneven electric field

Ichiro Fujieda, Masakatsu Tada, Fanny Rahadian

Proceedings Volume 6375, Optomechatronic Sensors, Instrumentation, and Computer-Vision Systems; 637504 (2006) https://doi.org/10.1117/12.688140
Event: Optics East 2006, 2006, Boston, Massachusetts, United States

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.

Citation Download Citation

Ichiro Fujieda, Masakatsu Tada, and Fanny Rahadian "Design of liquid crystal Fresnel lens by uneven electric field", Proc. SPIE 6375, Optomechatronic Sensors, Instrumentation, and Computer-Vision Systems, 637504 (12 October 2006); https://doi.org/10.1117/12.688140

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