JPS54143107A - Optical information device - Google Patents
Optical information deviceInfo
- Publication number
- JPS54143107A JPS54143107A JP4983078A JP4983078A JPS54143107A JP S54143107 A JPS54143107 A JP S54143107A JP 4983078 A JP4983078 A JP 4983078A JP 4983078 A JP4983078 A JP 4983078A JP S54143107 A JPS54143107 A JP S54143107A
- Authority
- JP
- Japan
- Prior art keywords
- information
- laser
- high band
- recorded
- elongated
- 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 record and reproduce high band signals easily with the use of a semiconductor laser by partly elongating recording information and controlling the rotating speed of a recording medium.
CONSTITUTION: High band information having being subjected to D/A conversion is recorded in a frame memory 19. If this record is read out in a low frequency, the information is elongated and fed to a semiconductor laser 1 through a C/A converter 22, an FM modulator 23, a laser drive circuit 18 and a switch 13. Thus, the elongated high band information is recorded without any use of a large size gas laser and an optical modulator in a disk 6 which is turned at a low speed together with such a motor 14 as is driven through the switch 13 by a low speed power source 15 by the modulated laser light generated in accordance with the elongated information by the laser 1. When the switch 13 is changed over, a DC power source 17 continuously drives the laser 1, and the power source of the motor 14 is changed to a high speed power source 16 so that the elongated information recorded in the disc 6 is compressed to reproduce the high band information. As a result, the high band information is recorded and reproduced simply with the use of the semiconductor of low power.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4983078A JPS54143107A (en) | 1978-04-28 | 1978-04-28 | Optical information device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4983078A JPS54143107A (en) | 1978-04-28 | 1978-04-28 | Optical information device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54143107A true JPS54143107A (en) | 1979-11-08 |
JPS6412011B2 JPS6412011B2 (en) | 1989-02-28 |
Family
ID=12841992
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4983078A Granted JPS54143107A (en) | 1978-04-28 | 1978-04-28 | Optical information device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54143107A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5687239A (en) * | 1979-12-18 | 1981-07-15 | Matsushita Electric Ind Co Ltd | Optical recording and reproducing device |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS451316Y1 (en) * | 1969-06-13 | 1970-01-21 |
-
1978
- 1978-04-28 JP JP4983078A patent/JPS54143107A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS451316Y1 (en) * | 1969-06-13 | 1970-01-21 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5687239A (en) * | 1979-12-18 | 1981-07-15 | Matsushita Electric Ind Co Ltd | Optical recording and reproducing device |
JPS6363974B2 (en) * | 1979-12-18 | 1988-12-09 |
Also Published As
Publication number | Publication date |
---|---|
JPS6412011B2 (en) | 1989-02-28 |
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