JPS5778648A - Optical recording method - Google Patents
Optical recording methodInfo
- Publication number
- JPS5778648A JPS5778648A JP55155305A JP15530580A JPS5778648A JP S5778648 A JPS5778648 A JP S5778648A JP 55155305 A JP55155305 A JP 55155305A JP 15530580 A JP15530580 A JP 15530580A JP S5778648 A JPS5778648 A JP S5778648A
- Authority
- JP
- Japan
- Prior art keywords
- laser
- tracking
- recording
- signal
- helium cadmium
- 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
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
Landscapes
- Optical Head (AREA)
Abstract
PURPOSE:To prevent a tracking pit from being omitted, by using an argon laser for a signal and a helium cadmium laser for a tracking groove, respectively. CONSTITUTION:A light source 1 is an argon laser, and a light source 2 is a helium cadmium laser. The argon laser is used for recording an information signal, and the helium cadmium laser which has a lot of noises and a small laser output, but causes no temporary drop nor stop of the laser output in the course of its use is used for recording a tracking signal, by which it is prevented that a tracking control signal becomes in a non-recording state.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55155305A JPS5778648A (en) | 1980-11-05 | 1980-11-05 | Optical recording method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55155305A JPS5778648A (en) | 1980-11-05 | 1980-11-05 | Optical recording method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5778648A true JPS5778648A (en) | 1982-05-17 |
Family
ID=15602990
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55155305A Pending JPS5778648A (en) | 1980-11-05 | 1980-11-05 | Optical recording method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5778648A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60101734A (en) * | 1983-11-07 | 1985-06-05 | Fujitsu Ltd | Optical head |
JPS61192038A (en) * | 1985-02-20 | 1986-08-26 | Matsushita Electric Ind Co Ltd | Optical information recorder |
-
1980
- 1980-11-05 JP JP55155305A patent/JPS5778648A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60101734A (en) * | 1983-11-07 | 1985-06-05 | Fujitsu Ltd | Optical head |
JPH0156455B2 (en) * | 1983-11-07 | 1989-11-30 | Fujitsu Ltd | |
JPS61192038A (en) * | 1985-02-20 | 1986-08-26 | Matsushita Electric Ind Co Ltd | Optical information recorder |
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