Light-scattering element

Details Light-scattering element Light-scattering element

1992-03-26

1993-04-20

Sikes, William L.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 52, 359 63, G02F 113

Patent

active

052047636

ABSTRACT:
A light-scattering element comprising a liquid-crystal material which is dispersed in a matrix of a transparent polymer material is manufactured by mixing at least one polymerizable liquid-crystal material and at least one non-reactive liquid-crystal material. The mixture is provided between two substrates 1 and 2 in the form of a thin layer 5, rubbed polymer layers 3 and 4 being present on the side of the substrates where the mixture is to be provided, as a result of which the molecules in the mixture are oriented. The reactive material is made to cure by means of actinic radiation thereby forming a polymer network in which the non-polymerizable material is present as a continuous phase. The difference between one of the refractive indices of the cured material and the corresponding refractive index of the non-polymerizable liquid-crystal material is less than 0.10, as a result of which the light-scattering element forms a simple polarizer.

REFERENCES:
patent: 4671618 (1987-06-01), Wu et al.
patent: 4688900 (1987-08-01), Doane et al.
patent: 5136403 (1992-08-01), Jones et al.
Takiron, Abstract, JP-A-1299022, Dec. 1989.

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