Information recording disk

Details Information recording disk Information recording disk

1990-06-21

1993-10-19

McElheny, Jr., Donald E.

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

369 4426, G11B 370, G11B 7007, G11B 724

Patent

active

052552616

ABSTRACT:
An information recording disk having a structure that a ring-shaped recording region is divided into a plurality of concentric, annular blocks, each of the blocks is divided in a circumferential direction into a plurality of equal sectors, and a recording track and a pit train for generating a header signal are previously formed in the recording region so that the recording density of a block increases as the block is nearer to the outer circumference of the recording region, is disclosed in which disk the recording region has a portion where blocks are pre-formatted so that the pit pitch of the header-signal generating pit train formed on the innermost recording track of the outer one of two adjacent blocks is greater than the pit pitch of the header-signal generating pit train formed on the innermost recording track of the inner block.

REFERENCES:
patent: 4016603 (1977-04-01), Ottesen
patent: 4507763 (1985-03-01), Kato
patent: 4530018 (1985-07-01), Hoshino et al.
patent: 4750059 (1988-06-01), Syracuse
patent: 4918677 (1990-04-01), Ashinuma et al.
patent: 4929822 (1990-05-01), Nakamura et al.

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