A new effective model for the director distribution of a twisted nematic liquid crystal cell

Mueller-Stokes characterization and optimization of a liquid crystal on silicon display showing depolarization

“…Researchers have proposed a series of reverse engineering models [17][18][19][20][21], usually based on the Jones matrix polarization formalism [22], to describe the modulation capabilities of LCDs. In general these models provide an approximate description of the profile of the electrooptic properties of the LC across the depth of the cell [17][18][19].…”

“…Researchers have proposed a series of reverse engineering models [17][18][19][20][21], usually based on the Jones matrix polarization formalism [22], to describe the modulation capabilities of LCDs. In general these models provide an approximate description of the profile of the electrooptic properties of the LC across the depth of the cell [17][18][19]. Other approaches concentrate on the numerical evaluation of the matrix elements of the Jones matrix describing the LCD [20], or consider the LCD as a lossless non-depolarizing polarization device, and regard it as a retarder -rotator combination [21].…”

“…This effect can not be calibrated and evaluated with the models described in Refs. [17][18][19][20][21]. The ability for a device showing depolarization to be used in amplitude-only or in phase-only modulation regimes is a novel and necessary study.…”

Transmission of Liquid Crystal Twist-Cells with Asymmetric Boundary Conditions

“…В литературе достаточно полно описаны оптические характеристики ТЭ в НЖК при начальной планарной ориентации ЖК на подложке (угол наклона θ=0) [3][4][5]. Одной из важнейших характеристик является пропускание ячейки при изменении параметра ΔnL/λ, где Δn -двулучепреломление ЖК, L -толщина слоя ЖК, λ -длина волны света.…”

Optimization of the spatial light modulation with twisted nematic liquid crystals by a genetic algorithm

“…The most simplified model regards TNLC as a polarization rotator with cascaded wave plates [3]. After that, some advanced models are proposed taking account of edge effects of TNLC so that the molecules near both alignment layers do not tilt independent of an electric field [4][5][6]. To estimate the modulation through a given TNLC by simulation, the characteristic parameters of the model of TNLC should be determined through experiments.…”