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

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 alig...

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Veröffentlicht in:Crystals (Basel) 2021-10, Vol.11 (10), p.1199
Hauptverfasser: Takatoh, Kohki, Ito, Masahiro, Saito, Suguru, Takagi, Yuuta
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Sprache:eng
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Zusammenfassung: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.
ISSN:2073-4352
2073-4352
DOI:10.3390/cryst11101199