Optical recording medium having large guide groove track pitch/m

Details Optical recording medium having large guide groove track pitch/m Optical recording medium having large guide groove track pitch/m

1993-09-15

1995-10-31

Gonzalez, Frank

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

369 4413, 3692751, 369278, 360 7707, G11B 724, G11B 2110

Patent

active

054636140

ABSTRACT:
A writable optical disk with meandering guide grooves is so arranged that a ratio of "track pitch/meander amplitude" is not less than a certain value, for example 57, at least in an out-of-phase portion in which meander of the meandering guide grooves is out of phase on mutually adjacent tracks. Also, the track pitch in the out-of-phase portion is larger than that in an in-phase portion in which meander of the guide grooves is in phase on mutually adjacent tracks.

REFERENCES:
patent: 4807211 (1989-02-01), Getreuer
patent: 4870508 (1989-09-01), Van Rosmalen et al.
patent: 4942565 (1990-07-01), Lagadec
patent: 4982398 (1991-01-01), Yamamoto et al.
patent: 5023856 (1991-06-01), Raaymakers et al.
patent: 5210738 (1993-05-01), Iwata et al.
patent: 5303216 (1994-04-01), Shinoda et al.
patent: 5377178 (1994-12-01), Saito
patent: 5383169 (1995-01-01), Shinoda et al.
patent: 5402411 (1995-03-01), Maeda et al.

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