JPS6459633A - Recorder for optical information - Google Patents
Recorder for optical informationInfo
- Publication number
- JPS6459633A JPS6459633A JP21673287A JP21673287A JPS6459633A JP S6459633 A JPS6459633 A JP S6459633A JP 21673287 A JP21673287 A JP 21673287A JP 21673287 A JP21673287 A JP 21673287A JP S6459633 A JPS6459633 A JP S6459633A
- Authority
- JP
- Japan
- Prior art keywords
- pulse
- recording
- signal
- given
- interval
- 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 Recording Or Reproduction (AREA)
Abstract
PURPOSE:To form pits at a uniform size at all times by varying the recording layer quantity in response to the interval of a recording pulse so as to correct the distortion due to the heat of a pit diameter. CONSTITUTION:DFFs 5a, 5b retard a recording signal 4s by clock periods T, 2T and a NAND gate 5c detects a recording pulse whose pulse interval is T. Similarly, DFFs 5a, 5b and a NAND gate 5d detects consecutive pulse and an output 5ds is at 'L'. The recording signal 4s is inputted to a laser drive circuit 7 and an AND signal 6 as being the signals 4s, 5ds is given to the circuit 8, which is stopped only at the consecutive pulse. An AND signal 6bs among the signals 4s, 5ds and 5cs is given to the 3rd laser drive circuit 9, which is stopped in case of consecutive pulse and with a pulse interval T. The drive current of the laser diode 3a is the sum of currents 7i-9i given to the laser drive circuits 7-9. With a short pulse interval, the current to the element 3a is small, the radiated luminous quantity is reduced to correct the heat dissipation by the recording light just before, the peak temperature is made constant and a pit with equal size is formed to the film at all times.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62216732A JP2649923B2 (en) | 1987-08-31 | 1987-08-31 | Optical information recording device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62216732A JP2649923B2 (en) | 1987-08-31 | 1987-08-31 | Optical information recording device |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP31006595A Division JP3218556B2 (en) | 1995-11-02 | 1995-11-02 | Optical information recording device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6459633A true JPS6459633A (en) | 1989-03-07 |
JP2649923B2 JP2649923B2 (en) | 1997-09-03 |
Family
ID=16693061
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62216732A Expired - Lifetime JP2649923B2 (en) | 1987-08-31 | 1987-08-31 | Optical information recording device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2649923B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01185838A (en) * | 1988-01-21 | 1989-07-25 | Yamaha Corp | Optical disk recorder |
EP0957475A1 (en) * | 1996-12-20 | 1999-11-17 | Matsushita Electric Industrial Co., Ltd. | Optical recording method and optical recorder |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63269321A (en) * | 1987-04-28 | 1988-11-07 | Yamaha Corp | Optical disk recorder |
-
1987
- 1987-08-31 JP JP62216732A patent/JP2649923B2/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63269321A (en) * | 1987-04-28 | 1988-11-07 | Yamaha Corp | Optical disk recorder |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01185838A (en) * | 1988-01-21 | 1989-07-25 | Yamaha Corp | Optical disk recorder |
EP0957475A1 (en) * | 1996-12-20 | 1999-11-17 | Matsushita Electric Industrial Co., Ltd. | Optical recording method and optical recorder |
EP0957475A4 (en) * | 1996-12-20 | 2006-08-02 | Matsushita Electric Ind Co Ltd | Optical recording method and optical recorder |
Also Published As
Publication number | Publication date |
---|---|
JP2649923B2 (en) | 1997-09-03 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EXPY | Cancellation because of completion of term | ||
FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080516 Year of fee payment: 11 |