Patent EP0231009A2 successfully refreshed from Google Patents.
EP0231009A2
Expired / Lapsed
EP
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Optical recording medium
Assignee: CSK Corp
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Filing: 1987-01-27
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Granted: —
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Expires: 2007-01-27
Abstract
Abstract An optical recording medium which is capable of easily effecting a tracking operation in the writing/reading for an optical recording medium of a type in which a plurality of data record tracks are provided, in a recording region of the medium, so as to be disposed side by side and spaced from each other at predetermined intervals. The optical recording medium of the present invention comprising at least one home position setting mark for setting a reference position for each of the data record tracks so that the writing/reading of data may be carried out by using the home position setting mark as a reference. The homo position setting mark may have track position marks at positions corresponding to the respective data record tracks for indicating the positions of the respective data record tracks. At least two tracking position indicative marks may further be spacedly provided on an extension of each of the data record tracks or a line parallel therewith for indicating an effective tracking position for each of the data record tracks.
Inventors
- 👤 Shunzo C/O Csk Corporation Takahashi
- 👤 Masaaki C/O Csk Corporation Nishioka
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 15:16
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/2407; G11B7/24085; G06; G06K; G06K19/00; G06K19/06; G06K19/06009; G06K19/06037; G06K19/08; G06K19/10; G06K19/14; G06K7/00; G06K7/01; G06K7/015; G11B17/00; G11B17/34; G11B19/00; G11B19/02; G11B19/04; G11B27/00; G11B27/10; G11B27/19; G11B27/28; G11B7/002; G11B7/0033; G11B7/08; G11B7/085; G11B7/08505
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
67 words
An optical recording medium of a type having a plurality of data record tracks juxtaposed within a recording region of the medium, keeping predetermined spaces between the respective tracks, which medium comprises at least one home position setting mark for setting a reference position for each of the data record tracks, so that data writing/reading is carried out, using said home position setting mark as a reference.
Claim 2
Dependent Claim
67 words
An optical recording medium of a type having a plurality of data record tracks juxtaposed within a recording region of the medium, keeping predetermined spaces between the respective tracks, which medium comprises at least one home position setting mark for setting a reference position for each of the data record tracks, so that data writing/reading is carried out, using said home position setting mark as a reference.
Claim 3
Dependent Claim
41 words
An optical recording medium as claimed in claim 1, wherein said home position setting mark has track position marks, which are provided at positions corresponding to the respective data record tracks, for indicating the positions of the data record tracks, respectively.
Claim 4
Dependent Claim
83 words
An optical recording medium as claime in claim 2, which further comprises; clock mark lines each having clock marks arranged at predetermined intervals, which lines are provided adjacently to the respective data record tracks so as to extend therealong; and said home position setting mark also functioning as references for the respective clock mark lines; track position marks indicative of the positions of the tracks, which are provided on said home position setting mark at positions corresponding to the respective clock mark lines.
Claim 5
Dependent Claim
75 words
An optical recording medium as claimed in claim 1, wherein said home position setting mark is disposed so as to extend in a direction perpendicular to the respective data record tracks, and which further comprises at least two tracking position indication marks which are indicative of an effective tracking position for the respective data record track and which are spacedly provided on an extension of the respective data record track or a line parallel therewith.
Claim 6
Dependent Claim
45 words
An optical recording medium as claimed in claim 4, which further comprises clock mark lines each having clock marks arranged on a line parallel with each adjacent data record track, said tracking position indication marks being provided at opposite ends of each clock mark line.
Claim 7
Dependent Claim
104 words
An optical recording medium as claimed in claim 1, wherein said home position setting mark is disposed so as to extend in a direction perpendicular to the respective data record tracks, and which further comprises at least two tracking position indication marks indicative of an effective tracking position for the respective data record track, which are spacedly provided on each of extensions of the respective data record tracks or a line parallel therewith, and further comprises track position marks indicative of the positions of the tracks, which are provided on said home position setting mark at positions corresponding to the respective data record tracks.
Claim 8
Dependent Claim
45 words
An optical recording medium as claimed in claim 4, which further comprises clock mark lines each having clock marks arranged on a line parallel with each adjacent data record track, said tracking position indication marks being provided at opposite ends of each clock mark line.
Claim 9
Dependent Claim
76 words
An optical recording medium as claimed in claim 4, which further comprises clock mark lines each having clock marks arranged on a line parallel with each adjacent data record track, said tracking position indication marks being provided at opposite ends of each clock mark line; and further comprises track position marks indicative of the positions of the tracks, which are provided on said home position setting mark at positions corresponding to the respective clock mark lines.
Claim 10
Dependent Claim
36 words
An optical recording medium as claimed in claim 1, which further comprises a clock mark line having clock marks disposed at predetermined intervals, said clock mark line being provided in common for said data record tracks.
Claim 11
Dependent Claim
36 words
An optical recording medium as claimed in claim 2, which further comprises a clock mark line having clock marks disposed at predetermined intervals, said clock mark line being provided in common for said data record tracks.
Claim 12
Dependent Claim
36 words
An optical recording medium as claimed in claim 4, which further comprises a clock mark line having clock marks disposed at predetermined intervals, said clock mark line being provided in common for said data record tracks.
Claim 13
Dependent Claim
21 words
An optical recording medium as claimed in claim 4, in which said tracking position indication marks are formed in a cross-shape.
Claim 14
Dependent Claim
40 words
An optical recording medium as claimed in claim 5, in which said tracking position indication marks are formed in a cross-shape, said cross mark having a central crossed portion of a size as large as each of the clock marks.
Claim 15
Dependent Claim
21 words
An optical recording medium as claimed in claim 1, in which said home position setting mark has an elongated strip-like form.
Claim 16
Dependent Claim
21 words
An optical recording medium as claimed in claim 4, in which said home position setting mark has an elongated strip-like form.
Claim 17
Dependent Claim
21 words
An optical recording medium as claimed in claim 6, in which said home position setting mark has an elongated strip-like form.
Claim 18
Dependent Claim
40 words
An optical recording medium as claimed in claim 2, in which said home position setting mark has an elongated strip-like form and said track position marks are provided on said home position setting mark in the form of geometric projections.
Claim 19
Dependent Claim
40 words
An optical recording medium as claimed in claim 3, in which said home position setting mark has an elongated strip-like form and said track position marks are provided on said home position setting mark in the form of geometric projections.
Claim 20
Dependent Claim
40 words
An optical recording medium as claimed in claim 6, in which said home position setting mark has an elongated strip-like form and said track position marks are provided on said home position setting mark in the form of geometric projections.
References Cited (Backward Citations)
No citation records indexed.
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