Process for producing plastic substrate for optical disks

Details Process for producing plastic substrate for optical disks Process for producing plastic substrate for optical disks

1989-04-14

1991-01-22

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Utilizing plasma, electric, electromagnetic, particulate, or...

264 19, 264 402, 264106, 26432813, 2643287, B29D 1100, B29C 4503

Patent

active

049869388

ABSTRACT:
A recording medium for optical high-density data storage and retrievel, comprising a flat transparent plastic substrate characterized by the following relationship between the refractive index (n.sub.z) in the direction perpendicular to the flat surfaces of the transparent substrate, and the refractive indexes (n.sub.x) and (n.sub.y) in the direction parallel to the flat surfaces of the transparent substrate:

REFERENCES:
patent: 4707321 (1987-11-01), Segawa et al.
patent: 4764331 (1988-08-01), Tokuhara et al.
patent: 4828769 (1989-05-01), Manus et al.

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