Tunable Narrow-bandpass Filter Using Blue Phase Liquid Crystal Etalon for Real-time Multi-spectral Imaging Systems

2019 ◽  
pp. 370 ◽  
Author(s):  
Kosuke Shinatake ◽  
Takahiro Ishinabe ◽  
Yosei Shibata ◽  
Hideo Fujikake
Keyword(s):  
Liquid Crystal ◽  
Real Time ◽  
Bandpass Filter ◽  
Spectral Imaging ◽  
Imaging Systems ◽  
Phase Liquid ◽  
Blue Phase ◽  
Narrow Bandpass Filter

scholarly journals A polarization-independent blue phase liquid crystal on silicon with low operation voltage

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Changli Sun ◽  
Jiangang Lu
Keyword(s):  
Liquid Crystal ◽  
Phase Modulation ◽  
Light Propagation ◽  
Incident Light ◽  
Optical Path ◽  
Imaging Systems ◽  
Phase Liquid ◽  
Blue Phase ◽  
Liquid Crystal On Silicon ◽  
Polarization Independent

AbstractA polarization-independent blue phase liquid crystal on silicon (BPLCoS) device with low operation voltage for 2π phase depth is demonstrated. With optimized reflection structure and two reflection films, the incident light may experience multifold optical path and 2π phase depth can be obtained. For the polarization-independence, an inclined electric field made by periodical gradient voltage is applied on the blue phase liquid crystal (BPLC) to match the light propagation direction. With the structure, the operation voltage can be lowered to 5.5 V in simulation and 5.9 V in experiment for 2π phase modulation at 1550 nm. The proposed device shows great potential for communication and imaging systems.

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

2018 ◽  
Vol E101.C (11) ◽  
pp. 897-900
Author(s):  
Kohei TERASHIMA ◽  
Kazuhiro WAKO ◽  
Yasuyuki FUJIHARA ◽  
Yusuke AOYAGI ◽  
Maasa MURATA ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Real Time ◽  
High Speed ◽  
Spectral Imaging ◽  
Imaging Systems

scholarly journals Low voltage and high contrast blue phase liquid crystal with red-shifted Bragg reflection

2013 ◽  
Vol 102 (1) ◽  
pp. 011113 ◽  
Author(s):  
Jin Yan ◽  
Zhenyue Luo ◽  
Shin-Tson Wu ◽  
Jyh-Wen Shiu ◽  
Yu-Cheng Lai ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Low Voltage ◽  
Bragg Reflection ◽  
High Contrast ◽  
Phase Liquid ◽  
Blue Phase

Hydrogen-bonded bent-core blue phase liquid crystal complexes containing various molar ratios of proton acceptors and donors

RSC Advances ◽  
2016 ◽  
Vol 6 (38) ◽  
pp. 32319-32327 ◽  
Author(s):  
Chun-Chieh Han ◽  
Yu-Chaing Chou ◽  
San-Yuan Chen ◽  
Hong-Cheu Lin
Keyword(s):  
Liquid Crystal ◽  
Chain Length ◽  
Alkyl Chain ◽  
Alkyl Chain Length ◽  
Chiral Center ◽  
Molar Ratio ◽  
Core Complex ◽  
Molar Ratios ◽  
Phase Liquid ◽  
Blue Phase

The molar ratio, alkyl chain length, lateral fluoro-substitution and the chiral center of H-bonded bent-core supramolecules would affect the BP ranges of BPLC complexes. H-bonded bent-core complex PIIIC9/AIIF* (3/7 mol mol−1) displayed the widest BPI range of ΔTBPI = 12 °C.

A Single-Cell-Gap Transflective Display Using a Blue-Phase Liquid Crystal

2011 ◽  
Vol 7 (4) ◽  
pp. 170-173 ◽  
Author(s):  
Feng Zhou ◽  
Jian-Peng Cui ◽  
Qiong-Hua Wang ◽  
Da-Hai Li ◽  
Di Wu
Keyword(s):  
Liquid Crystal ◽  
Single Cell ◽  
Phase Liquid ◽  
Blue Phase

Optically induced birefringence in dye-doped blue phase liquid crystals

2019 ◽  
Vol 46 (6) ◽  
pp. 913-919
Author(s):  
Lin ◽  
Kuo ◽  
Huang ◽  
Wu ◽  
Lin ◽  
...  
Keyword(s):  
Refractive Index ◽  
Liquid Crystal ◽  
Pump Beam ◽  
Pump Intensity ◽  
Photoinduced Change ◽  
Methyl Red ◽  
Sem Images ◽  
Photoinduced Birefringence ◽  
Phase Liquid ◽  
Blue Phase

This paper investigates the photoinduced change of refractive index in dye (methyl red, MR)-doped blue phase (DDBP) cells by illumination of a pump beam. Through excitation of light irradiation with proper photon energy, MR can transform from trans-state to cis-state and successively diffuse and anisotropically adsorb on the inner glass substrate of the DDBP cell along the direction perpendicular to the polarisation of the pump beam. The adsorbed MR molecules can effectively rotate the orientation of the liquid crystal (LC) molecules and thereby modulate the effective refractive index of the DDBP cell. The SEM images of the adsorbed regions of the illuminated DDBP samples were also taken for discussing the relation between the pump intensity and the photoinduced birefringence.

Synthesis of chiral azobenzene derivatives and the performance in photochemical control of blue phase liquid crystal

2017 ◽  
Vol 45 (3) ◽  
pp. 370-380 ◽  
Author(s):  
Wan-Li He ◽  
Meng Li ◽  
Sheng-Qiang Liu ◽  
Mei-ju Wei ◽  
Chang Liu ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Phase Liquid ◽  
Blue Phase ◽  
Azobenzene Derivatives
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