Consideration into method of deciding upon extraordinary axis direction in Twisted-Hematic LC

$90^{\circ}C$꼬인 네마틱 액정 ($90^{\circ}C$ Twisted-Nematic LC)의 이상 굴절 축($n_e$ axis) 방향 결정 방법에 대한 고찰

LCD is not very expensive and according to the principle that twisted-nematic LCD can modulate by electric signal, lots of researches been developed about many of theory, methods of design and calculating parameters effectively. In 1999 J. A. Davis et ai. proposed the method of deciding upon extraordinary and ordinary axis direction, which is based on Blazing Effect, inspect into changes of diffraction patterns. But in laboratory, it is difficulty to observe 5th or 6th diffraction pattern, and not clear in mathematical. In this paper, illuminating circular polarized beam been to TN LCD (twisted-nematic LCD), we found extraordinary axis direction with inspecting into maximum intensity distribution appeared in the side of analyzer Using Jones matrix method, we endowed with mathematical propriety.