Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk
First Claim
1. An optical disk on which data is recorded, wherein in a prescribed region of said disk, an identifier is provided for indicating whether a barcode-like mark is present or not on said optical disk, said identifier and said barcode-like mark are in respectively different locations on said disk, said barcode-like mark disposed in a circumferential direction, and said barcode-like mark having a plurality ofbars, each of said bars extending in a radial direction, and said optical disk is constructed from two disk substrates.
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Abstract
Data is recorded on an optical disk. In a prescribed region of the disk, an identifier is provided for indicating whether a barcode-like mark is present or not on the optical disk. The identifier and the barcode-like mark are in different locations on the disk. The barcode-like mark has a plurality of bars. Each of the bars extends in a radial direction. The optical disk is constructed from two disk substrates.
49 Citations
15 Claims
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1. An optical disk on which data is recorded, wherein in a prescribed region of said disk, an identifier is provided for indicating whether a barcode-like mark is present or not on said optical disk, said identifier and said barcode-like mark are in respectively different locations on said disk, said barcode-like mark disposed in a circumferential direction, and said barcode-like mark having a plurality of
bars, each of said bars extending in a radial direction, and said optical disk is constructed from two disk substrates.
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5. An optical disk reproduction apparatus for use with a disk on which data is recorded, wherein in a prescribed region of said disk, an identifier is provided for indicating whether a barcode-like mark is present or not on said optical disk, said identifier and said barcode-like mark are in respectively different locations on said disk, said barcode-like mark disposed in a circumferential direction, and said barcode-like mark having a plurality of bars, each of said bars extending in a radial direction, and said optical disk is constructed from two disk substrates said optical disk substrates comprising a first recording layer having a semitransparent reflection layer and a seconf recording layer having an almost nontransparent reflection layer and said first and second recording layers are reproduced from one side of said optical disk by said optical head, said apparaktus comprising:
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reproduction means including an optical head for reproducing said barcode-like mark on said optical disk;
identifier detecting means for detecting said identifier on said optical disk, and control means for signaling said reproduction means to reproduce said barcode-like mark based on said detected identifier wherein signals from said barcode-like mark portion in said predetermined area are obtained by switching the focus of said optical head. - View Dependent Claims (6, 7, 8, 12, 13, 14)
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Specification