Apparatus for recording information on an optical disk with a mo

Details Apparatus for recording information on an optical disk with a mo Apparatus for recording information on an optical disk with a mo

1989-12-26

1992-10-06

Envall, Jr., Roy N.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

3692754, 369 50, 369 48, G11B 700

Patent

active

051538695

ABSTRACT:
An information recording apparatus includes a rotating section for rotating an optical disk at a constant angular velocity, the disk including a spiral recording track or concentric recording tracks, a recording section for recording information with a light beam irradiated on the recording tracks of said optical disk, the light beam having an arbitrary recording frequency, and control means for controlling the recording section such that the information is recorded on the optical disk while a pitch between adjacent record pits is elongated as a position of a recording track is moved from an innermost track toward an outermost track, the pitch at the innermost track being a first pitch, the pitch at the outermost track being a second pitch, the pitch at a track between the innermost and outermost tracks being longer than the first pitch and shorter than the second pitch, and the second pitch being shorter than a third pitch expected at the outermost track when the optical disk is rotated at the constant angular velocity and the light beam is irradiated on the disk with a constant recording frequency.

REFERENCES:
patent: 4532621 (1985-07-01), Nakagawa
patent: 4550347 (1985-10-01), Nakamuta
U.S. application Ser. No. 456,962, filed Dec. 26, 1989.

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