| The dissertation describes a simplified model of spiral structure liquid crystal, and analyzes the basic optical properties of spiral structure liquid crystal. Meanwhile, the matrix theory, which is derived the polarized light transmission of the basic law in the spiral structure of liquid crystal, in detail, gives the changing relationships between them after different polarization states of light through the helix structure of liquid crystal; explains the physical reasons on the vibration plane of the linear polarized light having rotated 90 degrees, when it transmits through the helix structure of liquid crystal.And then, under different light sources, the paper has studied experimentally the relationship curves between the normalized transmission rate and the applied DC voltage, with the liquid crystal at different voltages; at the same time, the light transmission curves with the different incident angles are studied. The liquid crystal helix structure of the state is analyzed, using of transmitted light intensity and voltage curves, under different voltage. The research found that there is a simple non-linear relationship between the liquid crystal helix structure of the state function and the voltage, and it has a minimum value of light intensity through the past to reach the threshold voltage, due to liquid crystal film in the sub-threshold voltage region, when the liquid crystal structure is a complete screw-shaped body. The thesis analyzes the causes as well as the turning point of light show effects. |
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