Information recording medium

Details Information recording medium Information recording medium

1992-02-03

1993-08-24

LaRoche, Eugene R.

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

369 51, 3692754, G11B 2012

Patent

active

052395332

ABSTRACT:
An information recording medium of this invention comprises a plurality of concentric tracks or a spiral track, having a plurality of recording tracks for recording information, and record pits formed on the recording tracks, said record pits being formed at a predetermined pitch on an innermost recording track, and said record pits being formed in accordance with movement of a position of a target recording track from the innermost track toward an outermost track, while gradually increasing the predetermined pitch at a rate less than that at which linear velocity increases when said information recording medium is rotated at a constant velocity.

REFERENCES:
patent: 4329575 (1982-05-01), Roach
patent: 4357635 (1982-11-01), Hasegawa
patent: 4532621 (1985-07-01), Nakagawa
patent: 4700335 (1987-10-01), Aoi
patent: 4811317 (1989-03-01), Barnard
patent: 4873679 (1989-10-01), Murai
patent: 4896311 (1990-01-01), Ishihara
patent: 4918677 (1990-04-01), Ashinoma
U.S. application Ser. No. 07/639,305 (not enclosed).

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