scholarly journals Optical Filter with Large Angular Dependence of Transmittance Using Liquid Crystal Devices

Crystals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1199
Author(s):  
Kohki Takatoh ◽  
Masahiro Ito ◽  
Suguru Saito ◽  
Yuuta Takagi

This study proposed a new type of optical device with variable transmittance based on the incident angle direction. These devices consist of two liquid crystal devices (LCDs) with a half-wave plate between them. Hybrid aligned nematic (HAN)-type guest-host (GH) LCDs or GH-LCDs with antiparallel alignment of high pretilt angles were used. The use of a half-wave plate allowed for the control of the p- and s-waves. Using these devices, a wide range of transmittances were obtained because no polarizer was used. The newly proposed LCDs have a wide range of applications, including use on buildings, vehicles, and glasses.

2016 ◽  
Vol 24 (4) ◽  
Author(s):  
W. Piecek ◽  
L.R. Jaroszewicz ◽  
E. Miszczyk ◽  
Z. Raszewski ◽  
M. Mrukiewicz ◽  
...  

AbstractThere exists a need in a quality and accuracy of a three-dimensional laser metrology operating in numerically controlled automatic machines. For this purpose, one sends three laser beams mutually perpendicular. These three beams of the wavelength λ = 0.6328 μm are generated by the same laser and are directed along three independent, orthogonal, mutually perpendicular, optical paths with a given light polarization plain. Using these beams, constituting the frame of coordinates, three independent laser rangefinders are able to determine spatial coordinates of a working tool or a workpiece. To form these optical pulses, a special refractive index matched Half-Wave Plate with nematic Liquid Crystal (LCHWP) was applied. The presented half-wave plate is based on a single Twisted Nematic (TN) cell (with the twist angle


Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2788
Author(s):  
Meng-Ying Lin ◽  
Wen-Hui Xu ◽  
Rashid G. Bikbaev ◽  
Jhen-Hong Yang ◽  
Chang-Ruei Li ◽  
...  

Chiral-selective Tamm plasmon polariton (TPP) has been investigated at the interface between a cholesteric liquid crystal and a metasurface. Different from conventional TPP that occurs with distributed Bragg reflectors and metals, the chiral–achiral TPP is successfully demonstrated. The design of the metasurface as a reflective half-wave plate provides phase and polarization matching. Accordingly, a strong localized electric field and sharp resonance are observed and proven to be widely tunable.


2011 ◽  
Vol 50 (21) ◽  
pp. 3750 ◽  
Author(s):  
Jin Zhang ◽  
Peter A. R. Ade ◽  
Philip Mauskopf ◽  
Giorgio Savini ◽  
Lorenzo Moncelsi ◽  
...  

2020 ◽  
Vol 12 (2) ◽  
pp. 1-10 ◽  
Author(s):  
Yaru Li ◽  
Jun Luo ◽  
Xiong Li ◽  
Mingbo Pu ◽  
Xiaoliang Ma ◽  
...  

2006 ◽  
Vol 45 (27) ◽  
pp. 6982 ◽  
Author(s):  
Giampaolo Pisano ◽  
Giorgio Savini ◽  
Peter A. R. Ade ◽  
Vic Haynes ◽  
Walter K. Gear

Sign in / Sign up

Export Citation Format

Share Document