Optical record carrier having contrast enhancing information and

Details Optical record carrier having contrast enhancing information and Optical record carrier having contrast enhancing information and

1988-05-09

1990-08-14

McElheny, Jr., Donald

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

G11B 700

Patent

active

049493329

ABSTRACT:
An inscribable record carrier (1) is described, which comprises a previously recorded servo-track structure provided with a recording layer. The contrast between the servo-tracks (3) provided with information areas and the intermediate tracks (5) is increased by combining wide tracks (20) with a white-writing recording layer (24) or by combining narrow servo-tracks (20) with a black-writing recording layer (21). (FIGS. 6, 7)

REFERENCES:
patent: 4513407 (1985-04-01), Bricot
patent: 4656079 (1987-04-01), Yamada et al.
patent: 4807218 (1989-02-01), Gerber

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