Polarizer device

Details Polarizer device Polarizer device

1992-02-24

1993-08-10

Hille, Rolf

Optical: systems and elements

Holographic system or element

Having optical element between object and recording medium

359 38, 359 53, 359101, G02F 113

Patent

active

052354431

ABSTRACT:
The polarizer comprises a layer of cholesteric liquid crystal with Grandjean structure disposed in the path of the light and in which the light in a given wavelength range is reflected with selective and circular polarization or is transmitted with reversed direction of rotation, and a mirror which reversed the direction of rotation of the circular- polarized light. The component reflected by the mirror is also transmitted. If the liquid crystal layer is concentric with the source of natural light and the mirror is spherical, the result is a source of circular polarized light. A projection system is obtained by a combination of two of the aforementioned polarizers, one serving as a polarizer and one as an analyzer, and an interposed liquid crystal display cell for modulating the intensity of the polarized light.

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Derwent E19 L03 U11.

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