JPS6435727A - Optical disk device - Google Patents
Optical disk deviceInfo
- 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
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.
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)
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)
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 |
-
1987
- 1987-07-31 JP JP62192225A patent/JP2798245B2/en not_active Expired - Lifetime
Patent Citations (5)
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)
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 |
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