High Speed and Narrow-Bandpass Liquid Crystal Filter for Real-Time Multi Spectral Imaging Systems

Kohei TERASHIMA  Kazuhiro WAKO  Yasuyuki FUJIHARA  Yusuke AOYAGI  Maasa MURATA  Yosei SHIBATA  Shigetoshi SUGAWA  Takahiro ISHINABE  Rihito KURODA  Hideo FUJIKAKE  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E101-C   No.11   pp.897-900
Publication Date: 2018/11/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E101.C.897
Type of Manuscript: BRIEF PAPER
Category: 
Keyword: 
spectral imaging,  liquid crystal filter,  narrow bandpass,  fast switching,  overdrive,  

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Summary: 
We have developed the high speed bandpass liquid crystal filter with narrow full width at half maximum (FWHM) of 5nm for real-time multi spectral imaging systems. We have successfully achieved short wavelength-switching time of 30ms by the optimization of phase retardation of thin liquid crystal cells.