Tilt Angle Measurement on a Homogeneously Aligned Liquid Crystal

1999 ◽  
Vol 329 (1) ◽  
pp. 89-97 ◽  
Author(s):  
Iqbal A. Khan ◽  
Syed W. Azam ◽  
Sarah Akhtar ◽  
Rizwan Mahmood
Keyword(s):  
Liquid Crystal ◽  
Tilt Angle ◽  
Angle Measurement

Tilt-angle measurement of a sample stage using a capacitive liquid-based inclinometer

2012 ◽  
Author(s):  
K. Matoba ◽  
J. Takagi ◽  
T. Yasunaga ◽  
H. Jinnai ◽  
K. Iwasaki
Keyword(s):  
Tilt Angle ◽  
Angle Measurement

ON AN ORIENTATION TRANSITION IN NEMATIC LIQUID CRYSTALS INDUCED BY THE THICKNESS OF THE SAMPLE

1993 ◽  
Vol 07 (18) ◽  
pp. 1215-1222
Author(s):  
A. L. ALEXE-IONESCU
Keyword(s):  
Experimental Data ◽  
Phase Transitions ◽  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Tilt Angle ◽  
Critical Thickness ◽  
Large Range ◽  
Square Root ◽  
Chiral Molecules ◽  
Homeotropic Orientation

An orientation transition observed in nematic liquid crystal samples, induced by the thickness, is interpreted in a new way. By supposing that the nematic liquid crystal contains chiral impurities, it is shown that the homeotropic orientation is stable only for thicknesses smaller than a critical one, and is dependent on the concentration of the chiral molecules. At the critical thickness, the transition from the homeotropic orientation to the distorted one is characterized by a tilt angle proportional to the square root of the actual thickness minus the critical one. This trend is typical of second order phase transitions. The agreement between the theory and the experimental data is fairly good over a large range of thickness of the sample.

scholarly journals Anchoring Energy for Nematic Liquid Crystals an Analysis of the Proposed Forms

1984 ◽  
Vol 39 (11) ◽  
pp. 1066-1076 ◽  
Author(s):  
G. Barbero ◽  
N. V. Madhusudana ◽  
G. Durand
Keyword(s):  
Liquid Crystal ◽  
Infinite Series ◽  
Tilt Angle ◽  
Legendre Polynomials ◽  
Fourier Expansion ◽  
Easy Axis ◽  
Practical Interest ◽  
Surface Anchoring ◽  
Functional Forms ◽  
Anchoring Energy

We analyze the proposed functional forms describing the surface anchoring energy of MBBA nematic liquid crystal. Measurements of the surface torque versus tilt angle suggest that the simple cosinus-square form is not adequate for MBBA. The generalized form in an infinite series in cosinus-square is not useful since the set of functions is not orthogonal. Analyses using the orthogonal Legendre polynomials and Fourier expansion are given. Finally we analyse the data in terms of small tilt angles compared to the easy axis, and very far from it, which are the two limits of practical interest.

Spontaneous polarization, tilt angle, hysteresis and low-frequency relaxations in hydrogen bonded chiral liquid crystal dimer: M*SA:9OBA

2019 ◽  
Vol 551 (1) ◽  
pp. 178-196
Author(s):  
Mosalikanti Surekha ◽  
Attaluri Venkata Naga Ashok Kumar ◽  
Pallavajhula Venkata Chalapathy ◽  
Dakshina Murthy Potukuchi
Keyword(s):  
Liquid Crystal ◽  
Tilt Angle ◽  
Spontaneous Polarization ◽  
Low Frequency ◽  
Chiral Liquid Crystal ◽  
Hydrogen Bonded

Electric-Field-Induced Apparent Tilt Angle and Devil's Staircase in SmCα*of an Antiferroelectric Chiral Smectic Liquid Crystal

1991 ◽  
Vol 30 (Part 2, No. 10B) ◽  
pp. L1819-L1822 ◽  
Author(s):  
Kazuyuki Hiraoka ◽  
Yoichi Takanishi ◽  
Kent Skarp ◽  
Hideo Takezoe ◽  
Atsuo Fukuda
Keyword(s):  
Liquid Crystal ◽  
Electric Field ◽  
Tilt Angle ◽  
Devil's Staircase ◽  
Smectic Liquid Crystal ◽  
Devil’S Staircase
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