Hierarchical Structuring of Liquid Crystal Polymer–Laponite Hybrid Materials

Langmuir ◽  
2013 ◽  
Vol 29 (35) ◽  
pp. 11093-11101 ◽  
Author(s):  
Ulrich Tritschler ◽  
Igor Zlotnikov ◽  
Paul Zaslansky ◽  
Barbara Aichmayer ◽  
Peter Fratzl ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Hybrid Materials ◽  
Liquid Crystal Polymer ◽  
Crystal Polymer ◽  
Hierarchical Structuring

Polarization Measurements of Molded Liquid Crystal Polymer/Titania Composites

2010 ◽  
Author(s):  
B. R. Dantal ◽  
A. Saigal ◽  
M. A. Zimmerman
Keyword(s):  
Refractive Index ◽  
Liquid Crystal ◽  
Dielectric Properties ◽  
Millimeter Wave ◽  
Hybrid Materials ◽  
Broad Band ◽  
High Refractive Index ◽  
Liquid Crystal Polymer ◽  
Frequency Range ◽  
Crystal Polymer

During the past decade, the preparation of inorganic/organic hybrid materials with high refractive index has attracted considerable attention. In particular, TiO2 (Titanium dioxide or Titania), as inorganic domains, have been incorporated into a polymer matrix to produce high refractive index hybrid materials [1–3]. Polarization of injection molded liquid crystal polymer/Titania composite parts have been investigated in the broad band millimeter wave frequency range. The measurements have been performed by using two different spectroscopy techniques. First, free space quasi optical millimeter wave spectrometer, equipped with a high power source coherent radiation tunable in the 40–90 GHz frequency range is used. Second, low power dispersive Fourier transform spectrometer has been used for higher frequencies in the range of 100–600 GHz. Dielectric properties of liquid crystal polymer/Titania composites have been determined in the broad band millimeter wave frequency range. A correlation between dielectric properties and dispersed Titania weight percent has been observed using the two spectroscopy techniques. It is found that the absorption coefficient and loss tangent is a strong function of the output power of the sources of the incident radiation. On the other hand, refractive index and real permittivity values measured from both spectroscopy techniques are similar. In addition, it has been found that transmittance level and absorption losses depend on the orientation of the samples with respect to the orientation of electric and magnetic fields in the incident electro-magnetic wave. Finally, the polarization of the parts varies with the direction of flow of the molten plastic into the cavity.

Fabrication of slanted liquid crystal/polymer volume grating applied to augmented reality

2020 ◽  
Vol 35 (10) ◽  
pp. 1012-1018
Author(s):  
Ming-huan LIU ◽  
◽  
Xiu-hua FU ◽  
Fei WANG ◽  
Jian TANG ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Augmented Reality ◽  
Liquid Crystal Polymer ◽  
Crystal Polymer ◽  
Polymer Volume

An electrically light-transmittance-switchable film with a low driving voltage based on liquid crystal/polymer composites

2019 ◽  
Vol 47 (1) ◽  
pp. 106-113 ◽  
Author(s):  
Chunxin Li ◽  
Mei Chen ◽  
Lanying Zhang ◽  
Wenbo Shen ◽  
Xiao Liang ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Polymer Composites ◽  
Liquid Crystal Polymer ◽  
Light Transmittance ◽  
Driving Voltage ◽  
Crystal Polymer

A compact low frequency dual band liquid crystal polymer antenna for VHF and UHF band applications

2021 ◽  
Vol 42 ◽  
pp. 1356-1360
Author(s):  
Gandu Srilekha ◽  
P. Pardhasaradhi ◽  
B.T.P. Madhav ◽  
M. VenkateswaraRao ◽  
M.C. Rao
Keyword(s):  
Liquid Crystal ◽  
Low Frequency ◽  
Liquid Crystal Polymer ◽  
Dual Band ◽  
Crystal Polymer ◽  
Uhf Band

scholarly journals Enhancing the Optical Efficiency of Near-Eye Displays with Liquid Crystal Optics

Crystals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 107
Author(s):  
Tao Zhan ◽  
En-Lin Hsiang ◽  
Kun Li ◽  
Shin-Tson Wu
Keyword(s):  
Virtual Reality ◽  
Liquid Crystal ◽  
High Efficiency ◽  
Berry Phase ◽  
Optical Element ◽  
Liquid Crystal Polymer ◽  
Proof Of Concept ◽  
Optical Efficiency ◽  
Crystal Polymer ◽  
Light Efficiency

We demonstrate a light efficient virtual reality (VR) near-eye display (NED) design based on a directional display panel and a diffractive deflection film (DDF). The DDF was essentially a high-efficiency Pancharatnam-Berry phase optical element made of liquid crystal polymer. The essence of this design is directing most of the display light into the eyebox. The proposed method is applicable for both catadioptric and dioptric VR lenses. A proof-of-concept experiment was conducted with off-the-shelf optical parts, where the light efficiency was enhanced by more than 2 times.

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