JPS5538686A - Tracking controller of optical information reader - Google Patents

Tracking controller of optical information reader

Info

Publication number
JPS5538686A
JPS5538686A JP11268778A JP11268778A JPS5538686A JP S5538686 A JPS5538686 A JP S5538686A JP 11268778 A JP11268778 A JP 11268778A JP 11268778 A JP11268778 A JP 11268778A JP S5538686 A JPS5538686 A JP S5538686A
Authority
JP
Japan
Prior art keywords
track
servo
irradiation light
center
tracking
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
JP11268778A
Other languages
Japanese (ja)
Other versions
JPS6120929B2 (en
Inventor
Takashi Okano
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pioneer Video Corp
Universal Pioneer Corp
Original Assignee
Pioneer Video Corp
Universal Pioneer Corp
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 Pioneer Video Corp, Universal Pioneer Corp filed Critical Pioneer Video Corp
Priority to JP11268778A priority Critical patent/JPS5538686A/en
Publication of JPS5538686A publication Critical patent/JPS5538686A/en
Publication of JPS6120929B2 publication Critical patent/JPS6120929B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE:To prevent malfunction of a tracking servo to a defective part of a video track by controlling the switching operation of the servo for a deflecting mirror by detecting a shift of irradiation light of more than a fixed value from the track center. CONSTITUTION:Reproduced light from video disc 7 is detected by respective elements 9a-9d forming photo detecting element 9 and passed through comparing amplifier 10 and low-pass equalizer corresponding to the rotational frequency of the video disc to obtain an error voltage corresponding to the position shift of irradiation light from the track center and tracking deflecting mirror 6 is servocontrolled to make the irradiation light track the track. On the other hand, this error voltage is passed through LPF 15 and then applied to window comparator 16 where high and low reference voltage are set; when the irradiation light shifts from the center of the track in any direction by more than a fixed value, a high-level signal is generated to trigger monostable multivibrator 17, thereby froming the servo-loop of mirror 6. Therefore, malfunction of the servo such as repetitive reproduction of a defective track.
JP11268778A 1978-09-13 1978-09-13 Tracking controller of optical information reader Granted JPS5538686A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11268778A JPS5538686A (en) 1978-09-13 1978-09-13 Tracking controller of optical information reader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11268778A JPS5538686A (en) 1978-09-13 1978-09-13 Tracking controller of optical information reader

Publications (2)

Publication Number Publication Date
JPS5538686A true JPS5538686A (en) 1980-03-18
JPS6120929B2 JPS6120929B2 (en) 1986-05-24

Family

ID=14592956

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11268778A Granted JPS5538686A (en) 1978-09-13 1978-09-13 Tracking controller of optical information reader

Country Status (1)

Country Link
JP (1) JPS5538686A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57150144A (en) * 1981-03-10 1982-09-16 Matsushita Electric Ind Co Ltd Optical recorder and reproducer
EP0062464A2 (en) * 1981-03-31 1982-10-13 Discovision Associates Tracking system for a reading beam
US4406000A (en) * 1981-03-31 1983-09-20 Discovision Associates Tracking system for optical record medium
JPS58165955A (en) * 1982-03-19 1983-10-01 Yamazaki Mazak Corp Tail stock barrier setting and controlling method in numerically controlled lathe
JPS58165952A (en) * 1982-03-19 1983-10-01 Yamazaki Mazak Corp Tool barrier setting and controlling method in four-spindle numerically controlled lathe
FR2536196A1 (en) * 1982-11-11 1984-05-18 Sony Corp ALARM SERVO CONTROL CIRCUIT FOR OPTICAL REPRODUCTION DEVICE
JPS59205253A (en) * 1983-05-02 1984-11-20 Fanuc Ltd Tool interference checking method for tetraxial lathe
JPS6044223U (en) * 1983-08-30 1985-03-28 ソニー株式会社 Optical disk player head feed control device
JPS6064416U (en) * 1983-10-04 1985-05-07 パイオニア株式会社 Recorded information reading device
US4803676A (en) * 1985-03-09 1989-02-07 Deutsche Thomson-Brandt Gmbh Circuitry for an audio or video disk player

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0243256B2 (en) * 1981-03-10 1990-09-27
JPS57150144A (en) * 1981-03-10 1982-09-16 Matsushita Electric Ind Co Ltd Optical recorder and reproducer
EP0062464A2 (en) * 1981-03-31 1982-10-13 Discovision Associates Tracking system for a reading beam
EP0062464A3 (en) * 1981-03-31 1983-03-23 Discovision Associates Tracking system for a reading beam
US4406000A (en) * 1981-03-31 1983-09-20 Discovision Associates Tracking system for optical record medium
JPS58165955A (en) * 1982-03-19 1983-10-01 Yamazaki Mazak Corp Tail stock barrier setting and controlling method in numerically controlled lathe
JPS58165952A (en) * 1982-03-19 1983-10-01 Yamazaki Mazak Corp Tool barrier setting and controlling method in four-spindle numerically controlled lathe
JPH0313021B2 (en) * 1982-03-19 1991-02-21 Yamazaki Mazak Corp
JPH0255181B2 (en) * 1982-03-19 1990-11-26 Yamazaki Mazak Corp
FR2536196A1 (en) * 1982-11-11 1984-05-18 Sony Corp ALARM SERVO CONTROL CIRCUIT FOR OPTICAL REPRODUCTION DEVICE
US4587644A (en) * 1982-11-11 1986-05-06 Sony Corporation Tracking servocontrol circuits for reducing gain to avoid tracking defect in an optical reproducing apparatus
JPS59205253A (en) * 1983-05-02 1984-11-20 Fanuc Ltd Tool interference checking method for tetraxial lathe
JPS6044223U (en) * 1983-08-30 1985-03-28 ソニー株式会社 Optical disk player head feed control device
JPH0216418Y2 (en) * 1983-08-30 1990-05-07
JPS6064416U (en) * 1983-10-04 1985-05-07 パイオニア株式会社 Recorded information reading device
US4803676A (en) * 1985-03-09 1989-02-07 Deutsche Thomson-Brandt Gmbh Circuitry for an audio or video disk player

Also Published As

Publication number Publication date
JPS6120929B2 (en) 1986-05-24

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