JPS56117340A - Optical data reading and writing device - Google Patents

Optical data reading and writing device

Info

Publication number
JPS56117340A
JPS56117340A JP1881780A JP1881780A JPS56117340A JP S56117340 A JPS56117340 A JP S56117340A JP 1881780 A JP1881780 A JP 1881780A JP 1881780 A JP1881780 A JP 1881780A JP S56117340 A JPS56117340 A JP S56117340A
Authority
JP
Japan
Prior art keywords
head
photoelectric converter
light source
luminous flux
incident
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
JP1881780A
Other languages
Japanese (ja)
Other versions
JPS6048810B2 (en
Inventor
Hideto Iwaoka
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.)
Yokogawa Electric Corp
Original Assignee
Yokogawa Hokushin Electric Corp
Yokogawa Electric Works Ltd
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 Yokogawa Hokushin Electric Corp, Yokogawa Electric Works Ltd filed Critical Yokogawa Hokushin Electric Corp
Priority to JP55018817A priority Critical patent/JPS6048810B2/en
Publication of JPS56117340A publication Critical patent/JPS56117340A/en
Publication of JPS6048810B2 publication Critical patent/JPS6048810B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Automatic Focus Adjustment (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To adjust the relative position of a head on a disk surface to a normal position under self-control by the simple constitution that the reflected luminous flux of laser beam incident to the disk recording surface at constant incident angle (theta) is led to a photoelectric converter divided into four sections via a different optical path from the incident luminous flux. CONSTITUTION:Container 11 constituting optical data reading and writing device HD (head) has an opening tip; light source holding base 4 holding spot light source 5 and photodetection parts holding base 6 holding photoelectric converter 7 in the interior are incorporated on optical axes Z1 and Z3, respectively, and lenses L1, L3 and L2 are placed on optical axes Z1 and Z3, and optical axis Z2 of head HD. Photoelectric converter 7 is electrically divided into four parts (alpha), (beta), (gamma), and (delta) by split planes 9 and 10; a luminous flux from spot light source 5 is made incident to the disk recording surface and its reflected light is photodetected by photoelectric converter 7, which leads four output signals out of the head to arithmetic circuit SC, thereby outputtting three kind of arithmetic outputs.
JP55018817A 1980-02-18 1980-02-18 Optical data reading/writing device Expired JPS6048810B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55018817A JPS6048810B2 (en) 1980-02-18 1980-02-18 Optical data reading/writing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55018817A JPS6048810B2 (en) 1980-02-18 1980-02-18 Optical data reading/writing device

Publications (2)

Publication Number Publication Date
JPS56117340A true JPS56117340A (en) 1981-09-14
JPS6048810B2 JPS6048810B2 (en) 1985-10-29

Family

ID=11982119

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55018817A Expired JPS6048810B2 (en) 1980-02-18 1980-02-18 Optical data reading/writing device

Country Status (1)

Country Link
JP (1) JPS6048810B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58153238A (en) * 1982-03-05 1983-09-12 Ricoh Co Ltd Tracking method
JPS59101038A (en) * 1982-11-30 1984-06-11 Akai Electric Co Ltd Optical pickup
JPS61150391A (en) * 1984-12-20 1986-07-09 ドレクスラ−・テクノロジイ・コ−ポレ−シヨン Laser recorder

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58153238A (en) * 1982-03-05 1983-09-12 Ricoh Co Ltd Tracking method
JPS59101038A (en) * 1982-11-30 1984-06-11 Akai Electric Co Ltd Optical pickup
JPS61150391A (en) * 1984-12-20 1986-07-09 ドレクスラ−・テクノロジイ・コ−ポレ−シヨン Laser recorder

Also Published As

Publication number Publication date
JPS6048810B2 (en) 1985-10-29

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