High density optical disc and optical disc player

Details High density optical disc and optical disc player High density optical disc and optical disc player

1996-09-09

1997-11-18

Dinh, Tan

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

369 58, G11B 724

Patent

active

056894953

ABSTRACT:
An optical disc having a track pitch of 0.85 .mu.m, a shortest pit length of 0.49 .mu.m, a pit depth of 100 nm, and a pit width of 0.35 .mu.m is rotated at a linear velocity of 2.4-2.8 m/s such that the same is optically reproduced by a laser beam having a wavelength of 635 nm which is converged to a spot size of 0.9 .mu.m by an objective lens having a numerical aperture of 0.6, Accordingly, data is read from the optical disc at a transfer rate of 5.6 Mbps.

REFERENCES:
patent: 5040165 (1991-08-01), Taii et al.
patent: 5214629 (1993-05-01), Watanabe et al.
patent: 5216646 (1993-06-01), Imanaka et al.
patent: 5353265 (1994-10-01), Maeda et al.
patent: 5383176 (1995-01-01), Inui et al.
patent: 5459712 (1995-10-01), Sugaya et al.
patent: 5517486 (1996-05-01), Haneda
Optical Memory Symposium '92, Yokohama, Japan, pp. 69-70, Jul. 1991.
Nikkei Electronics 1991.5.27, No. 528, pp. 124-130, May, 1991.

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