JPS6488931A - Servo optical pick-up device - Google Patents

Servo optical pick-up device

Info

Publication number
JPS6488931A
JPS6488931A JP24544087A JP24544087A JPS6488931A JP S6488931 A JPS6488931 A JP S6488931A JP 24544087 A JP24544087 A JP 24544087A JP 24544087 A JP24544087 A JP 24544087A JP S6488931 A JPS6488931 A JP S6488931A
Authority
JP
Japan
Prior art keywords
disk
photodetector
laser beam
optical pick
projected
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
Application number
JP24544087A
Other languages
Japanese (ja)
Inventor
Masamitsu Mishina
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.)
Toshiba Corp
Original Assignee
Toshiba 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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP24544087A priority Critical patent/JPS6488931A/en
Publication of JPS6488931A publication Critical patent/JPS6488931A/en
Pending legal-status Critical Current

Links

Landscapes

  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To correctly apply tilt control to an optical pick-up by using a photodetector to obtain a focus error signal to obtain the angle information of a disk surface and the light projected on it. CONSTITUTION:An optical pick-up 31 is freely movably provided in the radius direction of a disk 30. A pick-up 31 has a laser light detecting device 311 and a laser beam is projected through a radial mirror 312 and an objective lens 313 to the disk 30. The laser beam reflected from the disk 30 is made incident on a photodetector 314 having a light receiving element divided into four. The output of the photodetector 314 is supplied to a differential amplifier 314, a focus error signal is obtained, and the angle information of the laser beam supplied to a differential amplifier 316 and projected on the disk surface is obtained. By using the output of the amplifier 316, a voice coil 35 is driven and the inclination of the mirror 312 is controlled. Thus, the correct tilt control can be executed.
JP24544087A 1987-09-29 1987-09-29 Servo optical pick-up device Pending JPS6488931A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24544087A JPS6488931A (en) 1987-09-29 1987-09-29 Servo optical pick-up device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24544087A JPS6488931A (en) 1987-09-29 1987-09-29 Servo optical pick-up device

Publications (1)

Publication Number Publication Date
JPS6488931A true JPS6488931A (en) 1989-04-03

Family

ID=17133694

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24544087A Pending JPS6488931A (en) 1987-09-29 1987-09-29 Servo optical pick-up device

Country Status (1)

Country Link
JP (1) JPS6488931A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5206848A (en) * 1990-07-19 1993-04-27 Pioneer Electronic Corporation Optical disk player having tilt servo control absent tilt sensor
US7366069B2 (en) 2003-12-04 2008-04-29 Mediatek Inc. Auto-adjusting system for an optical incident angle
US7457218B2 (en) 2003-11-27 2008-11-25 Nec Corporation Data reproducing method using tilt adjustment and data reproducing apparatus for the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5206848A (en) * 1990-07-19 1993-04-27 Pioneer Electronic Corporation Optical disk player having tilt servo control absent tilt sensor
US7457218B2 (en) 2003-11-27 2008-11-25 Nec Corporation Data reproducing method using tilt adjustment and data reproducing apparatus for the same
US7366069B2 (en) 2003-12-04 2008-04-29 Mediatek Inc. Auto-adjusting system for an optical incident angle

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