JPS563439A - Optical disk - Google Patents
Optical diskInfo
- Publication number
- JPS563439A JPS563439A JP7921079A JP7921079A JPS563439A JP S563439 A JPS563439 A JP S563439A JP 7921079 A JP7921079 A JP 7921079A JP 7921079 A JP7921079 A JP 7921079A JP S563439 A JPS563439 A JP S563439A
- Authority
- JP
- Japan
- Prior art keywords
- cycle
- pit
- oscillator
- pits
- meandering
- 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 realize the easy and accurate additional recording of the information, by arranging the pit trains on the optical disk with a fixed space secured and at the same time forming the guide groove so that the pit train may have the meandering in the rotational direction of the optical disk and in a fixed cycle.
CONSTITUTION: In the figure the solid lines and dotted lines indicate the guide groove pits and the pits to be recorded in addition respectively. The pits of the guide groove are recorded so as to secure the meandering with cycle T and by minute amplitude δ. And the pit space is formed to secure cycle (t). Both the output supplied from oscillator 76 having repetitive frequency f0 of cycle (t) and the output of oscillator 77 having frequency f1 of cycle (t) are applied and then modulated through optical modulator 62 to form the guide pit of cycle (t). On the other hand, the output of oscillator 78 having cycle T and frequency f2 is supplied to synchronous circuit 74 and then to light deflector 64. As a result, the light beams have the minute vibrations on the disk, thus securing the meandering recording for the pit train of cycle T.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54079210A JPS5821336B2 (en) | 1979-06-25 | 1979-06-25 | Optical discs and information recording devices |
US06/160,199 US4364118A (en) | 1979-06-25 | 1980-06-17 | Optical disk and optical information processor |
EP80103574A EP0021411B1 (en) | 1979-06-25 | 1980-06-24 | Optical disk and optical information processor |
DE8080103574T DE3072052D1 (en) | 1979-06-25 | 1980-06-24 | Optical disk and optical information processor |
CA000354741A CA1138106A (en) | 1979-06-25 | 1980-06-25 | Optical disk and optical information processor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54079210A JPS5821336B2 (en) | 1979-06-25 | 1979-06-25 | Optical discs and information recording devices |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS563439A true JPS563439A (en) | 1981-01-14 |
JPS5821336B2 JPS5821336B2 (en) | 1983-04-28 |
Family
ID=13683569
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP54079210A Expired JPS5821336B2 (en) | 1979-06-25 | 1979-06-25 | Optical discs and information recording devices |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5821336B2 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57111835A (en) * | 1980-12-29 | 1982-07-12 | Fujitsu Ltd | Optical information recording system |
JPS57208647A (en) * | 1981-06-18 | 1982-12-21 | Toshiba Corp | Optical disk for recording of information |
JPS58165742U (en) * | 1982-04-27 | 1983-11-04 | 株式会社東芝 | optical information storage medium |
WO1984003988A1 (en) * | 1983-03-28 | 1984-10-11 | Matsushita Electric Ind Co Ltd | Disc-shaped recording medium |
JPS61108589A (en) * | 1984-11-02 | 1986-05-27 | Ricoh Co Ltd | Optical information recording medium |
JPH01162282A (en) * | 1987-12-18 | 1989-06-26 | Hitachi Ltd | Tracking system |
-
1979
- 1979-06-25 JP JP54079210A patent/JPS5821336B2/en not_active Expired
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57111835A (en) * | 1980-12-29 | 1982-07-12 | Fujitsu Ltd | Optical information recording system |
JPS57208647A (en) * | 1981-06-18 | 1982-12-21 | Toshiba Corp | Optical disk for recording of information |
JPH0252328B2 (en) * | 1981-06-18 | 1990-11-13 | Tokyo Shibaura Electric Co | |
JPS58165742U (en) * | 1982-04-27 | 1983-11-04 | 株式会社東芝 | optical information storage medium |
WO1984003988A1 (en) * | 1983-03-28 | 1984-10-11 | Matsushita Electric Ind Co Ltd | Disc-shaped recording medium |
JPS61108589A (en) * | 1984-11-02 | 1986-05-27 | Ricoh Co Ltd | Optical information recording medium |
JPH01162282A (en) * | 1987-12-18 | 1989-06-26 | Hitachi Ltd | Tracking system |
Also Published As
Publication number | Publication date |
---|---|
JPS5821336B2 (en) | 1983-04-28 |
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