Variable-Focus Liquid Crystal Lenses Used in Imaging Systems as Focusing Elements

Mao YE  Bin WANG  Satoshi YANASE  Susumu SATO  

IEICE TRANSACTIONS on Electronics   Vol.E91-C   No.10   pp.1599-1603
Publication Date: 2008/10/01
Online ISSN: 1745-1353
DOI: 10.1093/ietele/e91-c.10.1599
Print ISSN: 0916-8516
Type of Manuscript: INVITED PAPER (Special Section on Electronic Displays)
liquid crystal lens,  imaging,  focusing,  relay lens scope,  TV lens,  

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Liquid crystal (LC) lenses that have hole-patterned electrodes and are driven by two voltages used as imaging devices are reported. Two different LC lenses are applied in image formation systems. One LC lens is used with a polarizer in a relay lens scope, and another LC lens that is polarization independent is used in a TV lens. Both LC lenses play roles of focusing elements in lens systems; objects are separately brought into focus by the LC lenses. Very sharp black-and-white and color images are formed by the systems.