JPS59157226U - Recording beam limiting circuit - Google Patents

Recording beam limiting circuit

Info

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
Application number
JP5206383U
Other languages
Japanese (ja)
Other versions
JPH0110752Y2 (en
Inventor
修 太田
Original Assignee
三洋電機株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 三洋電機株式会社 filed Critical 三洋電機株式会社
Priority to JP5206383U priority Critical patent/JPS59157226U/en
Publication of JPS59157226U publication Critical patent/JPS59157226U/en
Application granted granted Critical
Publication of JPH0110752Y2 publication Critical patent/JPH0110752Y2/ja
Granted legal-status Critical Current

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

【図面の簡単な説明】[Brief explanation of drawings]

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)

【実用新案登録請求の範囲】[Scope of utility model registration request] 記録指令信号を受けて記録再生用のレーザ光源を記録モ
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.
JP5206383U 1983-04-07 1983-04-07 Recording beam limiting circuit Granted JPS59157226U (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (9)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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