JPS6430030A - Optical disk device - Google Patents
Optical disk deviceInfo
- Publication number
- JPS6430030A JPS6430030A JP18512287A JP18512287A JPS6430030A JP S6430030 A JPS6430030 A JP S6430030A JP 18512287 A JP18512287 A JP 18512287A JP 18512287 A JP18512287 A JP 18512287A JP S6430030 A JPS6430030 A JP S6430030A
- Authority
- JP
- Japan
- Prior art keywords
- fes
- output
- optical disk
- envelope
- disk device
- 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
Landscapes
- Optical Recording Or Reproduction (AREA)
Abstract
PURPOSE:To prevent the generation of an offset in a focus error signal (FES) in both the unrecording part and recording part of an optical disk by adding an output of an RF envelope detecting circuit to an output of a division type optical detector as a correcting variable to form an FES. CONSTITUTION:An optical disk device has the RF envelope detecting circuit 2 for detecting an envelope of a reproduced output (RF signal) of a recording signal and the FES computing circuit 3 for adding the output of the RF envelope detecting circuit 2 to the output of the division type optical detector 1 as a correcting value to form an FES. Consequently, an FES computing circuit 3 for preventing the generation of an offset in an FES in both the unrecording part and recording part of an optical disk.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18512287A JPS6430030A (en) | 1987-07-24 | 1987-07-24 | Optical disk device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18512287A JPS6430030A (en) | 1987-07-24 | 1987-07-24 | Optical disk device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6430030A true JPS6430030A (en) | 1989-01-31 |
Family
ID=16165252
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18512287A Pending JPS6430030A (en) | 1987-07-24 | 1987-07-24 | Optical disk device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6430030A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0224842A (en) * | 1988-07-14 | 1990-01-26 | Aiwa Co Ltd | Optical head device |
JPH054317U (en) * | 1991-06-28 | 1993-01-22 | 株式会社ケンウツド | Write-once optical disk recording / reproducing device |
WO2006088050A1 (en) * | 2005-02-16 | 2006-08-24 | Matsushita Electric Industrial Co., Ltd. | Optical disk unit |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59201233A (en) * | 1983-04-27 | 1984-11-14 | Toshiba Corp | Focus control circuit of optical disk record reproducing device |
JPS61182638A (en) * | 1985-02-08 | 1986-08-15 | Hitachi Ltd | Focus servo circuit of optical recording and reproducing device |
-
1987
- 1987-07-24 JP JP18512287A patent/JPS6430030A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59201233A (en) * | 1983-04-27 | 1984-11-14 | Toshiba Corp | Focus control circuit of optical disk record reproducing device |
JPS61182638A (en) * | 1985-02-08 | 1986-08-15 | Hitachi Ltd | Focus servo circuit of optical recording and reproducing device |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0224842A (en) * | 1988-07-14 | 1990-01-26 | Aiwa Co Ltd | Optical head device |
JPH054317U (en) * | 1991-06-28 | 1993-01-22 | 株式会社ケンウツド | Write-once optical disk recording / reproducing device |
WO2006088050A1 (en) * | 2005-02-16 | 2006-08-24 | Matsushita Electric Industrial Co., Ltd. | Optical disk unit |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS53110503A (en) | Tracking servo-unit for rotary recording medium reproducing device | |
ES8206864A1 (en) | Optical focussing device with inclination detection | |
JPS57199903A (en) | Position detector | |
JPS6430030A (en) | Optical disk device | |
JPS5398802A (en) | Optical reproducer | |
JPS52134704A (en) | Optical recorder/reproducer unit | |
JPS5517850A (en) | Pcm-system recording device | |
JPS53128257A (en) | Artificial lead-in evasion circuit for reference carrier reproduction circuit | |
JPS5295203A (en) | Information reproduction apparatus | |
JPS5327011A (en) | Instantaneous c ompressing circuit | |
JPS6425356A (en) | Agc gain control circuit for optical recording and reproducing device | |
JPS5397722A (en) | Record information reproducer | |
JPS5397809A (en) | Compressing and extending system | |
JPS6430029A (en) | Optical disk device | |
JPS5276003A (en) | Optical information recording system | |
JPS5236012A (en) | Recording and playback device | |
JPS52135226A (en) | Memory device | |
JPS5397324A (en) | Recorded information reproducer | |
JPS5280803A (en) | Automatic focusing device | |
JPS5690684A (en) | Video signal regenerator | |
JPS5390909A (en) | Tracking control system for magnetic picture recorder/reproducer | |
JPS5417709A (en) | Changeover circuit of tape recorder | |
JPS5327003A (en) | Optical informati on reader | |
JPS521290A (en) | Circle arc compensation system | |
JPS5798139A (en) | Optical recorder and reproducer |