Work

Liquid-crystal variable-focus lenses with a spatially-distributed tilt angles

Year: 2009

Type: article

Abstract: A pretilt angle controlling method by the density of rubbings using a tiny stylus is proposed. The control of the surface pretilt angle is achieved by rubbing a side-chain type polyimide film for a homeotropic alignment. Smooth liquid crystal (LC) director distribution in the bulk layer is successfully obtained even though the rough surface orientation. This approach is applied to LC cylindrical and rectangular lenses with a variable-focusing function. The distribution profile of the rubbing pitch (the reciprocal of the rubbing density) for small aberration is determined to be quadratic. The variable focusing function is successfully achieved in the LC rectangular lens, and the voltage dependence of the focal length is tried to be explained by the LC molecular reorientation behavior.

Source: Optics Express

DOI: 10.1364/oe.17.010998

Authors: Michinori Honma, Toshiaki Nose, Satoshi Yanase, Rumiko Yamaguchi, Susumu Sato

Institutions: Akita Prefectural University, Akita University

Language: English

Topic: Liquid Crystal Research Advancements

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

OpenAlex ID: W2016808500

FWCI: 0.81

Cites: 16

Cited by: 15

Related to: 10