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Projects / Programmes source: ARIS

Light modulation using LCD electrooptic light shutters

Research activity

Code Science Field Subfield
1.02.00  Natural sciences and mathematics  Physics   

Code Science Field
P260  Natural sciences and mathematics  Condensed matter: electronic structure, electrical, magnetic and optical properties, supraconductors, magnetic resonance, relaxation, spectroscopy 
Keywords
light modulation, electrooptic light shutter, liquid crystals
Evaluation (rules)
source: COBISS
Researchers (8)
no. Code Name and surname Research area Role Period No. of publicationsNo. of publications
1.  01114  PhD Marija Jamšek-Vilfan  Physics  Researcher  2004  188 
2.  03426  MSc Bojan Marin  Physics  Researcher  2004 - 2005  93 
3.  01120  PhD Janez Pirš  Physics  Head  2004 - 2005  238 
4.  08737  Silvija Pirš    Technical associate  2004 - 2005  80 
5.  00400  PhD Dušan Ponikvar  Physics  Researcher  2004 - 2005  127 
6.  24276  PhD Andrej Vrečko  Physics  Junior researcher  2004 - 2005  30 
7.  26026  PhD Blaž Zupančič  Physics  Researcher  2005  44 
8.  07110  PhD Slobodan Žumer  Physics  Researcher  2004 - 2005  1,026 
Organisations (1)
no. Code Research organisation City Registration number No. of publicationsNo. of publications
1.  0106  Jožef Stefan Institute  Ljubljana  5051606000  90,600 
Abstract
The goal of the proposed applied research program is the reduction of the angular dependence of the light attenuation of the LCD light shutters, which still remains one of the important problems of these electrooptical elements. The R&D program envisages the development of the new concept of the LCD light shutters, based on the specific highly-twisted LC molecular structure in the LCD light shutter and specific relative orientation of the incident light polarization with respect to the alignment of the LC molecules on the input boundary surface. Such a construction allows for very high LC molecular orientation symmetry around the normal to the LCD light shutter plane, which in turn results in the construction of the LCD light shutters, the optical performances (i.e. light attenuation) of which can be made mutually complementary so that excellent angular compensation of the light attenuation can be reached. The high angular symmetry of the optical performances, allowed by the new LCD light shutter concept, can also result in efficient angular compensation using the birefringent compensation layers. The research program is based on the computer modeling of the optical properties of the multilayer structure composed of optical-birefringent layers, polarizing films and thin, specifically oriented LC layers. The achieved results will be experimentally evaluated using model LCD light shutters. Preliminary analyses show that one can obtain excellent angular compensation, which can meet and even surpass all the requirements for the optical elements used for personal protection applications, as set forth by the new international standard EN 379.
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