G - Physics – 02 – F
Patent
G - Physics
02
F
G02F 1/139 (2006.01) G02F 1/1337 (2006.01) G02F 1/31 (2006.01)
Patent
CA 2317609
A twisted nematic liquid crystal-based electro-optic modulator with a twist angle between 0~ and 90~, and preferably between 50~ and 80~ is provided. The modulator provides a relatively rapid switching time such as less than about 50 milliseconds, and provides relatively large extinction ratios, such as greater than -25 dB. Preferably the liquid crystal entrance director (216) differs from the polarization direction (222) by a beta angle of about 15~.
La présente invention concerne un modulateur électro-optique à base de cristaux liquides nématiques à angles de torsion aigus, ayant un angle de torsion compris entre 0· et 90·, de préférence entre 50· et 80·. Le modulateur présente un temps de commutation relativement rapide, par exemple inférieur à 50 millisecondes, et présente des rapports d'extension relativement importants, par exemple supérieurs à -25 dB. De préférence, l'orientation directrice d'entrée des cristaux liquides diffère de l'orientation de polarisation par un angle bêta d'environ 15·.
Chen Yen-Chen
Liu Jian-Yu
Wong Charles
Wu Kuang-Yi
Chorum Technologies Inc.
Johnson Ernest Peter
LandOfFree
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