Disc drive equipped with identification indication reader provid

Details Disc drive equipped with identification indication reader provid Disc drive equipped with identification indication reader provid

1997-09-25

1999-12-28

Tran, Thang V.

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369 751, 369 54, 235462, G11B 700

Patent

active

06009057&

ABSTRACT:
A disc drive is provided with an optical pick-up for reading data recorded in a program area of an optical disc; and a photo-interrupter for optically reading out bar information of a bar code which is arranged in an arc shape within at least a part of an annular bar code area provided on the optical disc between the program area and a clamping area of the optical disk so as to be readable from either side of the top and underside surfaces of the optical disk, wherein the photo-interrupter is located on the opposite side of the optical disc relative to the optical pick-up when the optical disc is loaded in the disc drive to read the information of the bar code from that position. Preferably, the photo-interrupter is provided on a clamper support which is provided for supporting a disc clamper for holding the optical disc between the disc clamper and a turntable for rotating the optical disc. This arrangement makes it easy to provide the photo-interrupter for reading the bar code.

REFERENCES:
patent: 4677604 (1987-06-01), Selby, III et al.
patent: 4983815 (1991-01-01), Kumasaka
patent: 5282187 (1994-01-01), Lee
patent: 5382776 (1995-01-01), Arii et al.
patent: 5671202 (1997-09-01), Brownstein et al.

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