Helical liquid crystalline element which produces linear polariz

Details Helical liquid crystalline element which produces linear polariz Helical liquid crystalline element which produces linear polariz

1992-10-15

1994-04-05

Sikes, William L.

Optical: systems and elements

Holographic system or element

Having optical element between object and recording medium

359 63, 359101, G02F 113, G02F 11335

Patent

active

053010450

ABSTRACT:
The invention relates to optical elements based on helical liquid-crystalline substances, having reflection bands of linear-polarized light, and to a process for preparing the same. The optical elements of this invention contain only one optically effective component based on helical liquid-crystalline substances. They reflect light incident perpendicular to the surface in a linear-polarized manner parallel to the direction of incidence of the incident light. The process for preparing the optical elements comprises illuminating a helical liquid-crystalline substance which contains at least one photoisomerizable substance with linear-polarized light in such a manner that this substance is subsequently aligned so that it exhibits at least one reflection band of linear-polarized light on illumination. Suitable helical liquid-crystalline substances are in particular organopolysiloxanes. The optical elements are suitable, for example, for data storage.

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