scholarly journals Efficiency improvements in a dichroic dye-doped liquid crystal Fresnel lens

2019 ◽  
Vol 27 (19) ◽  
pp. 26799 ◽  
Author(s):  
Ethan I. L. Jull ◽  
Markus Wahle ◽  
Peter J. M. Wyatt ◽  
Colin Ellis ◽  
Stephen J. Cowling ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Fresnel Lens ◽  
Dichroic Dye

scholarly journals Polymer Dispersed Cholesteric Liquid Crystals With a Toroidal Director Configuration under an Electric Field

Polymers ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 732
Author(s):  
Anna P. Gardymova ◽  
Mikhail N. Krakhalev ◽  
Victor Ya. Zyryanov ◽  
Alexandra A. Gruzdenko ◽  
Andrey A. Alekseev ◽  
...  
Keyword(s):  
Optical Properties ◽  
Liquid Crystal ◽  
Electric Field ◽  
Point Defects ◽  
Structural Response ◽  
Optical Filters ◽  
Response Curves ◽  
Polymer Dispersed Liquid Crystal ◽  
Dichroic Dye ◽  
Polymer Dispersed

The electro-optical properties of polymer dispersed liquid crystal (PDLC) films are highly dependent on the features of the contained liquid crystal (LC) droplets. Cholesteric LC droplets with homeotropic boundaries can form several topologically different orientational structures, including ones with single and more point defects, layer-like, and axisymmetric twisted toroidal structures. These structures are very sensitive to an applied electric field. In this work, we have demonstrated experimentally and by computer simulations that twisted toroidal droplets reveal strong structural response to the electric field. In turn, this leads to vivid changes in the optical texture in crossed polarizers. The response of droplets of different sizes were found to be equivalent in terms of dimensionless parameters. In addition, the explanation of this phenomenon showed a comparison of theoretical and experimental structural response curves aids to determine the shape of the droplet. Finally, we demonstrated that the addition of a dichroic dye allows such films to be used as optical filters with adjustable color even without polarizers.

Trifocal lens system with liquid crystal Fresnel lens

2018 ◽  
Vol 57 (10) ◽  
pp. 102502 ◽  
Author(s):  
Kohei Noda ◽  
Ryusei Momosaki ◽  
Kotaro Kawai ◽  
Moritsugu Sakamoto ◽  
Tomoyuki Sasaki ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Fresnel Lens ◽  
Lens System

Luminescent dichroic-dye-doped cholesteric liquid-crystal displays

2004 ◽  
Vol 12 (3) ◽  
pp. 341 ◽  
Author(s):  
Andro Chanishvili ◽  
Guram Chilaya ◽  
Gia Petriashvili ◽  
Riccardo Barberi ◽  
Roberto Bartolino ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Cholesteric Liquid Crystal ◽  
Liquid Crystal Displays ◽  
Dichroic Dye

Transmittance enhancement of nematic liquid crystal dichroic dye doped mixtures by addition of chiral dopants: a polarimetric analysis

2019 ◽  
Vol 680 (1) ◽  
pp. 20-30
Author(s):  
Kevin Raimondeau ◽  
Sylvain Rivet ◽  
Matthieu Dubreuil ◽  
Yann Le Grand ◽  
Laurent Dupont ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Dichroic Dye ◽  
Chiral Dopants

P‐106: Guest‐Host Liquid Crystal Devices Utilizing Dichroic Dye and Its Application

2019 ◽  
Vol 50 (1) ◽  
pp. 1652-1655
Author(s):  
Hong Gwon Lee ◽  
Chang Suk Lee ◽  
Sung Guk Lee ◽  
Yun Jin Heo ◽  
Young Jin Lim ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystal Devices ◽  
Dichroic Dye
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