Compatible optical disk

Details Compatible optical disk Compatible optical disk

1989-04-05

1991-01-08

Ro, Bentsu

Dynamic information storage or retrieval

Storage medium structure

Special groove

3692752, 369284, 346137, G11B 726

Patent

active

049842323

ABSTRACT:
A compatible optical disk in which information can be reproduced by a player normally used exclusively for reproduction, and writing, rewriting and erasure can be performed, comprises a recording film material characterized in that the reflectivity of a flat portion of the disk is lower than 50% in an erased or unrecorded state and the reflectivity of a recorded area is increased by recording by an irradiation of light, a light beam-guiding groove (12) formed on the surface of the disk substrate so that information is recorded or read out along the trough portion (12) or crest portion (17) of the guiding groove, and the reflectivity is enhanced in the crest portion (17) between the troughs or in the trough portion (12) between the crests.

REFERENCES:
patent: 4322839 (1982-03-01), Yamashita et al.
patent: 4583102 (1986-04-01), Tamura et al.
patent: 4718053 (1988-01-01), Sato et al.
patent: 4725502 (1988-02-01), Kiyomiya et al.
patent: 4774702 (1988-09-01), Giacomel
patent: 4818666 (1989-04-01), Gravesteijn et al.
patent: 4855984 (1989-08-01), Gerber

Affiliated with

Also associated with

Rating

Compatible optical disk does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Compatible optical disk, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compatible optical disk will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-941112