JPS6435727A - Optical disk device - Google Patents

Optical disk device

Info

Publication number
JPS6435727A
JPS6435727A JP62192225A JP19222587A JPS6435727A JP S6435727 A JPS6435727 A JP S6435727A JP 62192225 A JP62192225 A JP 62192225A JP 19222587 A JP19222587 A JP 19222587A JP S6435727 A JPS6435727 A JP S6435727A
Authority
JP
Japan
Prior art keywords
recording
optical disk
groove
reproducing
spot
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.)
Granted
Application number
JP62192225A
Other languages
Japanese (ja)
Other versions
JP2798245B2 (en
Inventor
Fusana Endou
Masanobu Yamamoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Corp
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=16287744&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=JPS6435727(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Sony Corp filed Critical Sony Corp
Priority to JP62192225A priority Critical patent/JP2798245B2/en
Publication of JPS6435727A publication Critical patent/JPS6435727A/en
Application granted granted Critical
Publication of JP2798245B2 publication Critical patent/JP2798245B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE:To reduce the fluctuation of an HF signal in a land recording and to obtain an optical disk device in which a RMI is increased after the recording by forming a discrete value information pattern on a recording film in a groove wobbled of a pitch above 1/2 of a track pitch and a width smaller than the diameter of the spot of a reproducing beam. CONSTITUTION:To the optical disk on which the recording film 3 having a reflectance elevated at the time of the recording is provided, the wobbled groove 2 having the width (w) above 1/2 of the track pitch and smaller than the diameter of the spot of the reproducing beam is formed and the discrete value information pattern is formed on the recording film 3 in the groove 2. As the difference signal of a detector radially divided radially of the optical disk, the wobbling information of the groove 2 is reproduced and the information of the discrete value information pattern is reproduced as the sum signal of the detector. A group wide in the width of the track pitch is formed ad the recording is executed in this group, so that the RMI (Radical Modulation Index) is elevated. A reproducing reproducing spot is applied to both the side edges of the group of the same phase to reduce the fluctuation of the HF signal.
JP62192225A 1987-07-31 1987-07-31 Optical disk drive Expired - Lifetime JP2798245B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62192225A JP2798245B2 (en) 1987-07-31 1987-07-31 Optical disk drive

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62192225A JP2798245B2 (en) 1987-07-31 1987-07-31 Optical disk drive

Related Child Applications (5)

Application Number Title Priority Date Filing Date
JP8248596A Division JP2915855B2 (en) 1996-08-31 1996-08-31 Optical disk drive
JP8248597A Division JP2954037B2 (en) 1996-08-31 1996-08-31 Disc-shaped recording medium
JP9003393A Division JPH09171621A (en) 1997-01-10 1997-01-10 Discoid recording medium
JP9003391A Division JP2892325B2 (en) 1997-01-10 1997-01-10 Optical disk drive
JP9003392A Division JP2892326B2 (en) 1997-01-10 1997-01-10 Optical disk drive

Publications (2)

Publication Number Publication Date
JPS6435727A true JPS6435727A (en) 1989-02-06
JP2798245B2 JP2798245B2 (en) 1998-09-17

Family

ID=16287744

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62192225A Expired - Lifetime JP2798245B2 (en) 1987-07-31 1987-07-31 Optical disk drive

Country Status (1)

Country Link
JP (1) JP2798245B2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0287344A (en) * 1988-06-20 1990-03-28 Sony Corp Recording medium and recording device and reproducing device thereof
JPH0536073A (en) * 1991-07-31 1993-02-12 Kenwood Corp Optical disk device
US5809006A (en) * 1996-05-31 1998-09-15 Cagent Technologies, Inc. Optical disk with copy protection, and apparatus and method for recording and reproducing same
KR100236888B1 (en) * 1989-05-08 2000-01-15 요트. 게. 아. 롤페즈 Information recording system, and recording device and record carrier for use in such an information recording system
WO2004023465A1 (en) * 2002-09-03 2004-03-18 Sony Corporation Optical read device, information processing device using optical recording medium, and information reproduction method
US11710904B2 (en) 2017-12-26 2023-07-25 Vayyar Imaging Ltd. Cavity backed antenna with in-cavity resonators

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61151843A (en) * 1984-12-25 1986-07-10 Nec Home Electronics Ltd Optical memory disk
JPS61260432A (en) * 1985-05-14 1986-11-18 Fuji Photo Film Co Ltd Tracking compensating method for optical disc device
JPS61292226A (en) * 1985-06-19 1986-12-23 Hitachi Ltd Information recording medium and its recording and reproducing device
JPS6252735A (en) * 1985-08-30 1987-03-07 Pioneer Electronic Corp Optical information recording and reproducing device
JPS6289253A (en) * 1985-10-16 1987-04-23 Nec Corp Optical information recording medium and its production

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61151843A (en) * 1984-12-25 1986-07-10 Nec Home Electronics Ltd Optical memory disk
JPS61260432A (en) * 1985-05-14 1986-11-18 Fuji Photo Film Co Ltd Tracking compensating method for optical disc device
JPS61292226A (en) * 1985-06-19 1986-12-23 Hitachi Ltd Information recording medium and its recording and reproducing device
JPS6252735A (en) * 1985-08-30 1987-03-07 Pioneer Electronic Corp Optical information recording and reproducing device
JPS6289253A (en) * 1985-10-16 1987-04-23 Nec Corp Optical information recording medium and its production

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0287344A (en) * 1988-06-20 1990-03-28 Sony Corp Recording medium and recording device and reproducing device thereof
KR100236888B1 (en) * 1989-05-08 2000-01-15 요트. 게. 아. 롤페즈 Information recording system, and recording device and record carrier for use in such an information recording system
JPH0536073A (en) * 1991-07-31 1993-02-12 Kenwood Corp Optical disk device
US5809006A (en) * 1996-05-31 1998-09-15 Cagent Technologies, Inc. Optical disk with copy protection, and apparatus and method for recording and reproducing same
WO2004023465A1 (en) * 2002-09-03 2004-03-18 Sony Corporation Optical read device, information processing device using optical recording medium, and information reproduction method
CN1324588C (en) * 2002-09-03 2007-07-04 索尼株式会社 Optical read device, information processing device and information reproduction method
US11710904B2 (en) 2017-12-26 2023-07-25 Vayyar Imaging Ltd. Cavity backed antenna with in-cavity resonators

Also Published As

Publication number Publication date
JP2798245B2 (en) 1998-09-17

Similar Documents

Publication Publication Date Title
EP1118982B1 (en) Optical disc reading system
EP1150283A3 (en) Information recording medium which indicates information according to the wobbling of a track and information recording and reproducing apparatus
JPS57105828A (en) Optical disk recording and reproducing system
JPH07107744B2 (en) Optical disc playback method
JPS5369006A (en) Reproducer of disc form signal recording media
JPH0221057B2 (en)
JPS6435727A (en) Optical disk device
JPS5313309A (en) Optically reproducing unit
DE3477080D1 (en) Apparatus for reproducing information from an optically readable record carrier
FR2349910B1 (en)
AU2958589A (en) Optical record carrier having contrast enhancing information and servo-tracks
JPS5622227A (en) Information recording system of optical disk
JPS57103134A (en) Optical disk
JP2637769B2 (en) Optical disk media
JPS6289253A (en) Optical information recording medium and its production
JPS63247928A (en) Optical memory medium
JPS5512594A (en) Information reproducing disc
EP0838807A3 (en) Phase change optical disk and a method for recording and playbacking optical information on or form an optical disk
JPS5276003A (en) Optical information recording system
JP2644214B2 (en) Optical memory board
JPS5292520A (en) Materials for recording
JPS5345204A (en) Tracking method for disk-type recording medium
JPS57167153A (en) Photomagnetic recording medium
JPS5587349A (en) Record/reproduction method
JPS567244A (en) Optical recording and reproducing system