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
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1. An optical disk, comprising:
- an information recording area;
a barcode-like mark area provided for barcode-like mark including a plurality of bars, each of said bars extending in a radial direction; and
an identifier indicating whether said barcode-like mark on the barcode-like mark area is present or not, said identifier being recorded on said information recording area,where the barcode-like mark area is located at an inner side of the optical disk than the information recording area.
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Abstract
Disclosed is an optical disk barcode forming method wherein, as information to be barcoded, position information for piracy prevention, which is a form of ID, is coded as a barcode and is recorded by laser trimming on a reflective film in a PCA area of an optical disk. When playing back the thus manufactured optical disk on a reproduction apparatus, the barcode data can be played back using the same optical pickup.
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Citations
5 Claims
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1. An optical disk, comprising:
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an information recording area; a barcode-like mark area provided for barcode-like mark including a plurality of bars, each of said bars extending in a radial direction; and an identifier indicating whether said barcode-like mark on the barcode-like mark area is present or not, said identifier being recorded on said information recording area, where the barcode-like mark area is located at an inner side of the optical disk than the information recording area. - View Dependent Claims (2, 3, 5)
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4. An optical disk, comprising:
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a barcode-like mark area; and an identifier recorded on said optical disk and separated from said barcode-like mark area, said identifier indicating whether a barcode-like mark is present or not on said barcode-like mark area, wherein said barcode-like mark area is provided for said barcode-like mark including a plurality of bars, each of said bars extending in a radial direction.
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Specification