JPH02156423A - Optical disk medium - Google Patents

Optical disk medium

Info

Publication number
JPH02156423A
JPH02156423A JP31037088A JP31037088A JPH02156423A JP H02156423 A JPH02156423 A JP H02156423A JP 31037088 A JP31037088 A JP 31037088A JP 31037088 A JP31037088 A JP 31037088A JP H02156423 A JPH02156423 A JP H02156423A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
grooves
intergrooves
error signal
tracking error
track density
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP31037088A
Inventor
Katsuji Nakagawa
Original Assignee
Nec Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Abstract

PURPOSE: To improve track density without lowering the intensity of a tracking error signal by nearly equalizing the width of the grooves and intergrooves of the optical disk.
CONSTITUTION: Either of the grooves 2 or the grooves 3 is selected by changing the polarity of the tracking error signal emitted from these grooves in case of tracing the grooves 2 or the intergrooves 3 with a converged beam. Track addresses and sector addresses are recorded by prebits 4 in a prebit region 5 on the extension line of the grooves 2 and the extension line of the intergroove 3 in a data recording region 6 and the reading thereof is possible. The grooves 2 and the intergrooves 3 are equal in width and since the information can be recorded in both, the intensity of the tracking error signal is less decreased even if the track density is increased as compared to the conventional disk medium with which recording is executed only in the intergrooves 3. The track density is thus increased.
COPYRIGHT: (C)1990,JPO&Japio
JP31037088A 1988-12-07 1988-12-07 Optical disk medium Pending JPH02156423A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP31037088A JPH02156423A (en) 1988-12-07 1988-12-07 Optical disk medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP31037088A JPH02156423A (en) 1988-12-07 1988-12-07 Optical disk medium

Publications (1)

Publication Number Publication Date
JPH02156423A true true JPH02156423A (en) 1990-06-15

Family

ID=18004430

Family Applications (1)

Application Number Title Priority Date Filing Date
JP31037088A Pending JPH02156423A (en) 1988-12-07 1988-12-07 Optical disk medium

Country Status (1)

Country Link
JP (1) JPH02156423A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5383176A (en) * 1992-05-15 1995-01-17 Sharp Kabushiki Kaisha Optical disk
US5422874A (en) * 1992-09-10 1995-06-06 Matsushita Electric Industrial Co., Ltd. Optical recording disk, and recording/reading apparatus using same
US5477526A (en) * 1993-03-10 1995-12-19 Matsushita Electric Industrial Co., Ltd. Optical disk substrate and optical disk employing said optical disk substrate
US5673250A (en) * 1994-07-06 1997-09-30 Sharp Kabushiki Kaisha Optical recording medium having pit rows on every other boundary and reproducing method thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59168939A (en) * 1983-03-16 1984-09-22 Matsushita Electric Ind Co Ltd Disc recording and reproducing device
JPS61170930A (en) * 1985-01-22 1986-08-01 Philips Nv Record carrier body, structural body former, information recorder and reader and record carrier

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59168939A (en) * 1983-03-16 1984-09-22 Matsushita Electric Ind Co Ltd Disc recording and reproducing device
JPS61170930A (en) * 1985-01-22 1986-08-01 Philips Nv Record carrier body, structural body former, information recorder and reader and record carrier

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5383176A (en) * 1992-05-15 1995-01-17 Sharp Kabushiki Kaisha Optical disk
US6379864B1 (en) 1992-05-15 2002-04-30 Sharp Kabushiki Kaisha Method for manufacturing an optical disk
US5645978A (en) * 1992-05-15 1997-07-08 Sharp Kabushiki Kaisha Method for manufacturing optical disk
US5422874A (en) * 1992-09-10 1995-06-06 Matsushita Electric Industrial Co., Ltd. Optical recording disk, and recording/reading apparatus using same
US5724338A (en) * 1992-09-10 1998-03-03 Matsushita Electric Industrial Co., Ltd. Rewritable disk-shaped optical recording medium
US5594716A (en) * 1993-03-10 1997-01-14 Matsushita Electric Industrial Co., Ltd. Optical disk substrate and optical disk employing said optical disk substrate
US5477526A (en) * 1993-03-10 1995-12-19 Matsushita Electric Industrial Co., Ltd. Optical disk substrate and optical disk employing said optical disk substrate
US5673250A (en) * 1994-07-06 1997-09-30 Sharp Kabushiki Kaisha Optical recording medium having pit rows on every other boundary and reproducing method thereof
US6058100A (en) * 1994-07-06 2000-05-02 Sharp Kabushiki Kaisha Optical recording medium having pit rows

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