JPS59157226U - Recording beam limiting circuit - Google Patents
Recording beam limiting circuitInfo
- Publication number
- JPS59157226U JPS59157226U JP5206383U JP5206383U JPS59157226U JP S59157226 U JPS59157226 U JP S59157226U JP 5206383 U JP5206383 U JP 5206383U JP 5206383 U JP5206383 U JP 5206383U JP S59157226 U JPS59157226 U JP S59157226U
- Authority
- JP
- Japan
- Prior art keywords
- recording
- circuit
- guide track
- recording beam
- pair
- 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 Head (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第1図は本発明の一実施例に係る光学系の模式的説明図
、第2図は同実施例のトラッキングエラー検出原理説明
図、第3図は同実施例の要部回路ブロック図をそれぞれ
顕わす。
主な図番の説明、6・・・センサ一対、Da・・・ガイ
ドトラック、7・・・演算回路、9・・・エラーレベル
判別回路、10・・・モード設定回路、1・・・レーザ
光源。Fig. 1 is a schematic explanatory diagram of an optical system according to an embodiment of the present invention, Fig. 2 is an explanatory diagram of the tracking error detection principle of the embodiment, and Fig. 3 is a block diagram of the main circuit of the embodiment. Reveal. Explanation of main drawing numbers, 6...Pair of sensors, Da...Guide track, 7...Arithmetic circuit, 9...Error level discrimination circuit, 10...Mode setting circuit, 1...Laser light source.
Claims (1)
ードに設定するモード設電回路と、ディスクのガイドト
ラックからの反射光をガイドトラックの幅方向に分割し
て受光するトラッキング用のセンサ一対と、該センサ一
対の受光出力の差出力を和出力で割ってトラッキングエ
ラー検出信号を発する演算回路と、該トラッキングエラ
ー検出信号レベルが所定範囲を越えたとき前記モード設
定回路に記録禁止信号を供給するエラーレベル判別回路
とをそれぞれ設け、記録ビームが前記ガイドトラックよ
り所定量外れたとき前記レーザ光源の発光レベルを落し
記録を禁止することを特徴とするディスクレコーダの記
録ビーム制限回路。A mode setting circuit that receives a recording command signal and sets a recording/reproducing laser light source to a recording mode, and a pair of tracking sensors that divides the reflected light from the guide track of the disk in the width direction of the guide track and receives the light. , an arithmetic circuit that generates a tracking error detection signal by dividing the difference output between the light reception outputs of the pair of sensors by the sum output; and supplying a recording prohibition signal to the mode setting circuit when the tracking error detection signal level exceeds a predetermined range. What is claimed is: 1. A recording beam limiting circuit for a disk recorder, comprising: an error level determination circuit; and when the recording beam deviates from the guide track by a predetermined amount, the light emission level of the laser light source is lowered to prohibit recording.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5206383U JPS59157226U (en) | 1983-04-07 | 1983-04-07 | Recording beam limiting circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5206383U JPS59157226U (en) | 1983-04-07 | 1983-04-07 | Recording beam limiting circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS59157226U true JPS59157226U (en) | 1984-10-22 |
JPH0110752Y2 JPH0110752Y2 (en) | 1989-03-28 |
Family
ID=30182433
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5206383U Granted JPS59157226U (en) | 1983-04-07 | 1983-04-07 | Recording beam limiting circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS59157226U (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62164228A (en) * | 1986-01-14 | 1987-07-20 | Matsushita Electric Ind Co Ltd | Track jump detecting device |
JPS62164225A (en) * | 1986-01-14 | 1987-07-20 | Matsushita Electric Ind Co Ltd | Retrieving device for information track |
JPS62204437A (en) * | 1986-03-04 | 1987-09-09 | Matsushita Electric Ind Co Ltd | Rewriting type optical recording and reproducing device having plural light spots |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52134704A (en) * | 1976-05-06 | 1977-11-11 | Teac Co | Optical recorder/reproducer unit |
JPS53110504A (en) * | 1977-03-08 | 1978-09-27 | Matsushita Electric Ind Co Ltd | Optical reproducing device |
JPS555923A (en) * | 1978-06-27 | 1980-01-17 | Nippon Yuuboard Kogyo Kk | Production of rigid urethane block utilizing the waste of rigid foamed urethane |
JPS561022A (en) * | 1979-06-18 | 1981-01-08 | Asahi Optical Co Ltd | Focus detector of camera |
JPS56145533A (en) * | 1980-04-15 | 1981-11-12 | Matsushita Electric Ind Co Ltd | Tracking control device in optical recording and reproducing device |
JPS57150144A (en) * | 1981-03-10 | 1982-09-16 | Matsushita Electric Ind Co Ltd | Optical recorder and reproducer |
JPS5840878A (en) * | 1981-09-04 | 1983-03-09 | Hitachi Ltd | Driving method for semiconductor laser |
JPS5840878U (en) * | 1981-09-14 | 1983-03-17 | 東亜特殊電機株式会社 | Semi-fixed adjustment element operating section in electronic equipment |
JPS58125241A (en) * | 1982-01-20 | 1983-07-26 | Matsushita Electric Ind Co Ltd | Optical recording and reproducing device |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5840878B2 (en) * | 1976-12-16 | 1983-09-08 | 株式会社東京放送 | Color phase checker |
-
1983
- 1983-04-07 JP JP5206383U patent/JPS59157226U/en active Granted
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52134704A (en) * | 1976-05-06 | 1977-11-11 | Teac Co | Optical recorder/reproducer unit |
JPS53110504A (en) * | 1977-03-08 | 1978-09-27 | Matsushita Electric Ind Co Ltd | Optical reproducing device |
JPS555923A (en) * | 1978-06-27 | 1980-01-17 | Nippon Yuuboard Kogyo Kk | Production of rigid urethane block utilizing the waste of rigid foamed urethane |
JPS561022A (en) * | 1979-06-18 | 1981-01-08 | Asahi Optical Co Ltd | Focus detector of camera |
JPS56145533A (en) * | 1980-04-15 | 1981-11-12 | Matsushita Electric Ind Co Ltd | Tracking control device in optical recording and reproducing device |
JPS57150144A (en) * | 1981-03-10 | 1982-09-16 | Matsushita Electric Ind Co Ltd | Optical recorder and reproducer |
JPS5840878A (en) * | 1981-09-04 | 1983-03-09 | Hitachi Ltd | Driving method for semiconductor laser |
JPS5840878U (en) * | 1981-09-14 | 1983-03-17 | 東亜特殊電機株式会社 | Semi-fixed adjustment element operating section in electronic equipment |
JPS58125241A (en) * | 1982-01-20 | 1983-07-26 | Matsushita Electric Ind Co Ltd | Optical recording and reproducing device |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62164228A (en) * | 1986-01-14 | 1987-07-20 | Matsushita Electric Ind Co Ltd | Track jump detecting device |
JPS62164225A (en) * | 1986-01-14 | 1987-07-20 | Matsushita Electric Ind Co Ltd | Retrieving device for information track |
JPS62204437A (en) * | 1986-03-04 | 1987-09-09 | Matsushita Electric Ind Co Ltd | Rewriting type optical recording and reproducing device having plural light spots |
Also Published As
Publication number | Publication date |
---|---|
JPH0110752Y2 (en) | 1989-03-28 |
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