Optical continuous phase-only correlator using liquid crystal television

1993 ◽  
Author(s):  
Yunlong Sheng ◽  
Gilles Paul-Hus
Keyword(s):  
Liquid Crystal ◽  
Continuous Phase ◽  
Liquid Crystal Television

Binary phase modulation properties of a programmable liquid-crystal television display

1992 ◽  
Vol 31 (35) ◽  
pp. 7393 ◽  
Author(s):  
B. S. Lowans ◽  
B. Bates ◽  
R. G. H. Greer ◽  
J. Aiken
Keyword(s):  
Liquid Crystal ◽  
Phase Modulation ◽  
Binary Phase ◽  
Liquid Crystal Television

Applicability Of The Liquid Crystal Television For Optical Data Processing

1986 ◽  
Author(s):  
Jeffrey A. Davis ◽  
Roger A. Lilly ◽  
Kevin D. Krenz ◽  
Hua-Kuang Liu
Keyword(s):  
Liquid Crystal ◽  
Data Processing ◽  
Optical Data ◽  
Optical Data Processing ◽  
Liquid Crystal Television

SIMULATION OF CO-PLANAR WAVEGUIDE LIQUID CRYSTAL BASED PHASE SHIFTER

2015 ◽  
Vol 77 (10) ◽  
Author(s):  
Nasser A ALQuaiti ◽  
Noor Asniza Murad
Keyword(s):  
Liquid Crystal ◽  
Phase Shift ◽  
Phase Shifter ◽  
Low Cost ◽  
Continuous Phase ◽  
Phase Shifting ◽  
Telecommunication System ◽  
Liquid Crystal Material ◽  
Compact Size ◽  
5Cb Liquid Crystal

This paper discussed the design and performances of a liquid crystal phase shifter that can be used in tuning devices. Tuning devices growth with the demand in the emerging in telecommunication system. Tuning devices with smooth continuous phase shifting at low cost and compact size would be an advantage. This paper proposed a phase shifter using 5CB liquid crystal material. The advantages of using the material is the smoothness and continuity of the transitions in the phase shift. It is done by having a structure with cavity filled with the liquid crystal and applied with certain voltage that can be changed. The changes in voltage would change the applied electric field, and thus would change the permittivity of the material. The changes would affect the wave propagation and thus contribute to the phase shifting. The performance of the phase shifter was tested by means of simulation using CST Suite 2014 software. The results show that the higher the frequency, the higher the phase shift would occur. The highest FoM achieved is 68 (deg/dB) at 8 GHz. A phase shifter with smooth and continuous phase shift can be used as the feeding network in an array scanning antennas systems.

scholarly journals The Influence of Co-Surfactants on Lamellar Liquid Crystal Structures Formed in Creams

Pharmaceutics ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 864
Author(s):  
Delaram Ahmadi ◽  
Najet Mahmoudi ◽  
Richard K. Heenan ◽  
David J. Barlow ◽  
M. Jayne Lawrence
Keyword(s):  
Liquid Crystal ◽  
Crystal Structures ◽  
Small Angle ◽  
Liquid Paraffin ◽  
Sodium Dodecyl ◽  
Ternary Systems ◽  
Continuous Phase ◽  
Lamellar Liquid Crystal ◽  
X Ray Scattering ◽  
Oil In Water

It is well-established that oil-in-water creams can be stabilised through the formation of lamellar liquid crystal structures in the continuous phase, achieved by adding (emulsifier) mixtures comprising surfactant(s) combined (of necessity) with one or more co-surfactants. There is little molecular-level understanding, however, of how the microstructure of a cream is modulated by changes in co-surfactant and of the ramifications of such changes on cream properties. We investigate here the molecular architectures of oil-free, ternary formulations of water and emulsifiers comprising sodium dodecyl sulfate and one or both of the co-surfactants hexadecanol and octadecanol, using microscopy, small-angle and wide-angle X-ray scattering and small-angle neutron scattering. We then deploy these techniques to determine how the structures of the systems change when liquid paraffin oil is added to convert them to creams, and establish how the structure, rheology, and stability of the creams is modified by changing the co-surfactant. The ternary systems and their corresponding creams are shown to contain co-surfactant lamellae that are subtly different and exhibit different thermotropic behaviours. The lamellae within the creams and the layers surrounding their oil droplets are shown to vary with co-surfactant chain length. Those containing a single fatty alcohol co-surfactant are found to contain crystallites, and by comparison with the cream containing both alcohols suffer adverse changes in their rheology and stability.

Reflective liquid crystal television display

1968 ◽  
Vol 56 (12) ◽  
pp. 2146-2149 ◽  
Author(s):  
J.A. Van Raalte
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystal Television

Real-time Optical Intensity Correlator Using Photorefractive BSO and a Liquid Crystal Television

1992 ◽  
Vol 39 (4) ◽  
pp. 761-769 ◽  
Author(s):  
C. Soutar ◽  
Z.Q. Wang ◽  
C.M. Cartwright ◽  
W.A. Gillespie
Keyword(s):  
Liquid Crystal ◽  
Real Time ◽  
Optical Intensity ◽  
Liquid Crystal Television
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