초록

Disclosed is an apparatus for formation of high quality plastic sheet in a continuous fashion. Also disclosed are a variety of optical and electronic display applications for high quality plastic sheet produced in a continuous fashion.

대표청구항 ▼

[ What is claimed is:] [1.]1. A 3-dimensional optical storage medium comprising a high quality plastic sheet having dispersed thereon one or more pigments, dyes or mixtures thereof, wherein the pigments, dyes or mixtures thereof undergo a change in optical properties locally upon exposure to light;

[ What is claimed is:] [1.]1. A 3-dimensional optical storage medium comprising a high quality plastic sheet having dispersed thereon one or more pigments, dyes or mixtures thereof, wherein the pigments, dyes or mixtures thereof undergo a change in optical properties locally upon exposure to light; wherein the optical storage medium is produced by the steps of:a) providing molten plastic resin;b) directing the molten plastic resin to an overflow die having an inlet and an outlet;c) shaping the molten plastic resin into a molten web using said overflow die;d) combining the pigment, dye or mixture thereof with the molten plastic resin prior to shaping the molten resin into a web using said overflow die;e) guiding said molten web away from said overflow die; andf) cooling said molten web to form a solid; rein the high quality plastic sheet has a birefringence of less than or equal to 0.0002.