Course n. Of discitis. "Optoelectronic devices and devices" (modulator based on liquid Crystals LCD

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Uploaded: 24.07.2008
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Term Project 66 sec., 36 fig., 7 sources, Appendix 1.
The object of the research is based on the electro-optical device is an LCD cell, performs phase modulation of the light wave.
The aim is to study the phenomenon of reorientation of the LC molecules under the influence of an electric field, the influence of the properties of the passage of the light wave through the crystal and finding the equation of the light wave at the output of an anisotropic medium (LCD), the state of its polarization and the intensity of the radiation from the modulating voltage.
In the calculations we used a program developed in the medium MathCAD 13. The explanatory note to the thesis work done in a text editor Microsoft Word 2000.
Course project is unique and is exposed only on this trading platform.

Additional information

This course covers the following topics:
Analysis and formulation of the problem
Classification of liquid crystals
The light in an anisotropic medium
The properties of the wave in the LCD
Differences optical and dielectric properties for different LCD
Effect of the electric field on the orientation of the LC molecules
The main types of molecular orientation of the nematic
Effect Fredericks
The structure of the electro-optical modulator based on a nematic LC
The analytical part
Derivation of the wave equation
The solution of the wave equation for an arbitrary tensor of dielectric conductivity LCD
The structure of the permittivity tensor of conductivity in a nematic LCD
The change of the refractive index of the value of the external field applied to the LCD
The polarization state of the light wave at the output of LCD
Fresnel formulas
Fresnel formulas for horizontally polarized waves
Fresnel formulas for vertically polarized waves
Description of the light wave by a Gaussian beam
General conclusions on the list
Settlement of the
The dependence of the angle of rotation of the director of the magnitude of the applied field
The dependence of the birefringence of the nematic liquid crystal of the layer of the applied field
Determination of the coefficients of reflection from the surface of the LCD plate
Finding a common component of the wave passing through the LCD, given the reflections inside the LCD plate
Finding unusual component passing through the LCD wave, considering reflections inside the LCD plate
The calculation of the basic characteristics of the output wave
Distribution of a Gaussian beam

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