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 comprising a plurality of sections (T1, T2, T3, . . . ) having a width of T, whereinsaid sections (T1, T2, T3, . . . ) have a width of T respectively and are formed in a circumferential direction in such region where main information is not recorded,a predetermined number corresponding to sub information, of said sections (B1, B2, B3, . . . ) are used as recording area of said sub information,a mark having stripe-like configuration in a radius direction is formed within each said section for said sub information and the width of said mark is equal to or smaller than half of said width of T.
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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
15 Claims
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1. An optical disk comprising a plurality of sections (T1, T2, T3, . . . ) having a width of T, wherein
said sections (T1, T2, T3, . . . ) have a width of T respectively and are formed in a circumferential direction in such region where main information is not recorded, a predetermined number corresponding to sub information, of said sections (B1, B2, B3, . . . ) are used as recording area of said sub information, a mark having stripe-like configuration in a radius direction is formed within each said section for said sub information and the width of said mark is equal to or smaller than half of said width of T.
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6. A recording apparatus for recording information on an optical disk which comprises a plurality of sections (T1, T2, T3, . . . ) having a width of T respectively and formed in a circumferential direction in such region where main information is not recorded, comprising:
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recording means for recording sub information within a predetermined number corresponding to said sub information, of said sections, (B1, B2, B3, . . . ) wherein said recording means records said sub information by forming a mark which has stripe-like configuration in a radius direction and the width of which is equal to or smaller than a half of said width of T, within said each sections for said sub information. - View Dependent Claims (7, 8, 9, 10)
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Specification