JPS567244A - Optical recording and reproducing system - Google Patents
Optical recording and reproducing systemInfo
- Publication number
- JPS567244A JPS567244A JP7994279A JP7994279A JPS567244A JP S567244 A JPS567244 A JP S567244A JP 7994279 A JP7994279 A JP 7994279A JP 7994279 A JP7994279 A JP 7994279A JP S567244 A JPS567244 A JP S567244A
- Authority
- JP
- Japan
- Prior art keywords
- modulation
- groove
- information
- laser light
- recording medium
- 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
Landscapes
- Optical Record Carriers And Manufacture Thereof (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
PURPOSE: To make it possible to record information with a high density by an arbitrary information modulation system, by forming previously a groove on the recording medium so that groove may be orgthogonal to the main scanning direction and by detecting the modulation beam from this groove in distinction from modulation dependent upon information and by using the modulation beam for the synchronizing or position signal.
CONSTITUTION: In recording medium 1, grooves 3 are formed radially regularly on disc-form base 2, and photosensitive recording material 4 is caused to adhere to all the surface. Recording medium 1 is rotated, and laser light 5 modulated by information is condensed onto recording material 4 to record information. When the output of laser light 5 for no formation of 8 bits is the photosensitive threshold level or less of recording material 4, the reflection light in this part is subjected to intensity modulation each time laser light 5 moves across radial groove 3, and therefore, this modulation can be uses as a synchronizing signal. For reproducing, a reflection type disc is suitable to this system, and the depth of radial grooves 3 is set to a value other than integral multiples of λ/4 for wave length λ of the beam for reproducing.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7994279A JPS567244A (en) | 1979-06-25 | 1979-06-25 | Optical recording and reproducing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7994279A JPS567244A (en) | 1979-06-25 | 1979-06-25 | Optical recording and reproducing system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS567244A true JPS567244A (en) | 1981-01-24 |
| JPS6244329B2 JPS6244329B2 (en) | 1987-09-19 |
Family
ID=13704360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7994279A Granted JPS567244A (en) | 1979-06-25 | 1979-06-25 | Optical recording and reproducing system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS567244A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5233583A (en) * | 1990-12-19 | 1993-08-03 | General Electric Company | Tracking and reading system for an optical medium and medium for use therewith |
-
1979
- 1979-06-25 JP JP7994279A patent/JPS567244A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5233583A (en) * | 1990-12-19 | 1993-08-03 | General Electric Company | Tracking and reading system for an optical medium and medium for use therewith |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6244329B2 (en) | 1987-09-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4364118A (en) | Optical disk and optical information processor | |
| US4734904A (en) | Reproducing-only and recordable-reproduceable optical discs and common optical disc player therefor | |
| EP0265984A1 (en) | Optically readable record carrier for recording information, method and apparatus for manufacturing such a record carrier, apparatus for recording information on such a record carrier, and apparatus for reading information recorded on such a record carrier | |
| AU4554489A (en) | Method and apparatus for controlling and detecting recording laser beam | |
| RU97112501A (en) | OPTICAL DISK, OPTICAL DISK DEVICE AND METHOD FOR RECORDING ON THE OPTICAL DISK | |
| CA1100233A (en) | Scanning light beam of changing size | |
| JPS5266405A (en) | Optical recording system of information recording discs | |
| JPS647327A (en) | Method and apparatus for optical information recording | |
| JPS567244A (en) | Optical recording and reproducing system | |
| GB1509495A (en) | Record disc and method of producing the same | |
| US5508996A (en) | Optical disc having an offset tracking groove for representing multi-value digital information signals and reproducing apparatus therefor | |
| JPS57103134A (en) | Optical disk | |
| JPS6435727A (en) | Optical disk device | |
| JPS5821336B2 (en) | Optical discs and information recording devices | |
| JPS5622231A (en) | Optical disk duplicator | |
| JP2000504465A (en) | Optical recording medium | |
| EP0145789B1 (en) | Disc-shaped recording medium | |
| JPS6289253A (en) | Optical information recording medium and its production | |
| JPH0458095B2 (en) | ||
| JPS53100203A (en) | Optical reproducer | |
| JPS5562534A (en) | Information signal recording method for original disc of grooveless information recording medium disc | |
| JP2674986B2 (en) | Method and device for recording optical information | |
| JPS6022738A (en) | Optical disk | |
| JPS5345204A (en) | Tracking method for disk-type recording medium | |
| JPS57167153A (en) | Photomagnetic recording medium |