JPH02177027A - Optical disk - Google Patents

Optical disk

Info

Publication number
JPH02177027A
JPH02177027A JP32979088A JP32979088A JPH02177027A JP H02177027 A JPH02177027 A JP H02177027A JP 32979088 A JP32979088 A JP 32979088A JP 32979088 A JP32979088 A JP 32979088A JP H02177027 A JPH02177027 A JP H02177027A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
surface
disk
recording
area
recorded area
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
JP32979088A
Inventor
Koji Sasaki
Original Assignee
Sony 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 enhance the ratio of a recorded area to the area of an optical disk and to accomplish the large capacity of the disk by constituting both a land surface and a groove surface as the recorded area in the optical disk where the land surface and the groove surface having different heights are alternately arranged in a radial direction.
CONSTITUTION: The dimensions of the respective widths of the land surface 2 and the groove surface 3 are the same and the surfaces 2 and 3 are formed in the dimension where recording is possible so as to constitute both of them as the recorded area. By positioning an optical pickup at a position opposed to the land surface 2, a pit 5 is formed to perform recording and also readout is performed with reflected light from the pit 5. Next, by positioning the optical pickup at a position opposed to the groove surface 3, the recording and readout are performed in the same way. At such a time, an inclined surface 4 serves as a guard. Thus, the ratio of the recorded area to the area of the disk is enhanced and the large capacity of the disk is accomplished by performing recording on both surfaces 2 and 3.
COPYRIGHT: (C)1990,JPO&Japio
JP32979088A 1988-12-27 1988-12-27 Optical disk Pending JPH02177027A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP32979088A JPH02177027A (en) 1988-12-27 1988-12-27 Optical disk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP32979088A JPH02177027A (en) 1988-12-27 1988-12-27 Optical disk

Publications (1)

Publication Number Publication Date
JPH02177027A true true JPH02177027A (en) 1990-07-10

Family

ID=18225289

Family Applications (1)

Application Number Title Priority Date Filing Date
JP32979088A Pending JPH02177027A (en) 1988-12-27 1988-12-27 Optical disk

Country Status (1)

Country Link
JP (1) JPH02177027A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0565751A1 (en) * 1992-04-14 1993-10-20 Pioneer Electronic Corporation Optical recording method and apparatus therefor
EP0588305A2 (en) * 1992-09-14 1994-03-23 Matsushita Electric Industrial Co., Ltd. Optical information recording medium and optical information recording/reproducing apparatus
WO1997038421A1 (en) * 1996-04-10 1997-10-16 Hitachi Maxell, Ltd. Optical recording medium
US5734634A (en) * 1995-01-23 1998-03-31 Sony Corporation Recording method and recording equipment of optical disc reproducing method and reproducing equipment of optical disc
US5949747A (en) * 1996-06-04 1999-09-07 Canon Kabushiki Kaisha Test recording method and optical information recording/reproducing apparatus for determining an optimum power of the light output from a light source in erasing pieces of information recorded on a land and groove of a recording medium
US6379864B1 (en) 1992-05-15 2002-04-30 Sharp Kabushiki Kaisha Method for manufacturing an optical disk
US6628578B1 (en) 1999-01-29 2003-09-30 Matsushita Electric Industrial Co., Ltd. Disklike storage medium and tracking method using the same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57138065A (en) * 1981-01-12 1982-08-26 Philips Nv Recording carrier
JPS6289236A (en) * 1985-10-16 1987-04-23 Nec Corp Optical information recording device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57138065A (en) * 1981-01-12 1982-08-26 Philips Nv Recording carrier
JPS6289236A (en) * 1985-10-16 1987-04-23 Nec Corp Optical information recording device

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0565751A1 (en) * 1992-04-14 1993-10-20 Pioneer Electronic Corporation Optical recording method and apparatus therefor
US5452273A (en) * 1992-04-14 1995-09-19 Pioneer Electronic Corporation Optical recording method and apparatus therefor
US6379864B1 (en) 1992-05-15 2002-04-30 Sharp Kabushiki Kaisha Method for manufacturing an optical disk
EP0588305A2 (en) * 1992-09-14 1994-03-23 Matsushita Electric Industrial Co., Ltd. Optical information recording medium and optical information recording/reproducing apparatus
US5616390A (en) * 1992-09-14 1997-04-01 Matsushita Electric Industrial Co., Ltd. Optical recording medium permitting detection of identification signals in land areas and groove areas, optical information recording/reproducing apparatus and apparatus for producing an original disk for forming a disk substrate
EP0588305A3 (en) * 1992-09-14 1996-01-03 Matsushita Electric Ind Co Ltd Optical information recording medium and optical information recording/reproducing apparatus
US5734634A (en) * 1995-01-23 1998-03-31 Sony Corporation Recording method and recording equipment of optical disc reproducing method and reproducing equipment of optical disc
WO1997038421A1 (en) * 1996-04-10 1997-10-16 Hitachi Maxell, Ltd. Optical recording medium
US6054199A (en) * 1996-04-10 2000-04-25 Hitachi Maxell, Ltd. Optical recording medium
US5949747A (en) * 1996-06-04 1999-09-07 Canon Kabushiki Kaisha Test recording method and optical information recording/reproducing apparatus for determining an optimum power of the light output from a light source in erasing pieces of information recorded on a land and groove of a recording medium
US6628578B1 (en) 1999-01-29 2003-09-30 Matsushita Electric Industrial Co., Ltd. Disklike storage medium and tracking method using the same
US7002883B2 (en) 1999-01-29 2006-02-21 Matsushita Electric Industrial Co., Ltd. Disk-shaped storage medium and tracking method using the same

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