Light pipe and polarized-light source

Details Light pipe and polarized-light source Light pipe and polarized-light source

2005-10-04

2005-10-04

Shafer, Ricky D. (Department: 2872)

Optical: systems and elements

Polarization without modulation

Polarization by optical activity

C359S506000, C359S599000, C362S558000, C362S560000

Reexamination Certificate

active

06952310

ABSTRACT:
A light pipe is obtained by laminating on one or both surfaces of a light-transmitting resin plate a polarized-light scattering plate having fine birefringent domains dispersed therein and hence showing anisotropy in scattering. The polarized-light scattering plate comprises a transparent film having fine domains dispersed therein comprising a liquid crystal polymer which exhibits nematic at temperatures lower than the glass transition temperature of the polymer constituting matrix of the transparent film and has a glass transition temperature of 50° C. or higher. The light pipe as a laminate may further comprise a specular reflection layer, a polarization-retaining lens and a light diffusion layer laminated thereon. The light pipe may further comprise a light source mounted at least on one side face thereof to provide a planar polarized-light source.

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