JPS6467723A - Pick-up device for optical disk - Google Patents

Pick-up device for optical disk

Info

Publication number
JPS6467723A
JPS6467723A JP22577387A JP22577387A JPS6467723A JP S6467723 A JPS6467723 A JP S6467723A JP 22577387 A JP22577387 A JP 22577387A JP 22577387 A JP22577387 A JP 22577387A JP S6467723 A JPS6467723 A JP S6467723A
Authority
JP
Japan
Prior art keywords
optical disk
light
focusing
goes
laser
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
JP22577387A
Other languages
Japanese (ja)
Inventor
Mitsutoshi Iko
Masayuki Mino
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.)
Minolta Co Ltd
Original Assignee
Minolta Co 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 Minolta Co Ltd filed Critical Minolta Co Ltd
Priority to JP22577387A priority Critical patent/JPS6467723A/en
Publication of JPS6467723A publication Critical patent/JPS6467723A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE:To simplify a device and adjustment by also executing focusing detection with a beam for tracking from a semiconductor laser. CONSTITUTION:A laser beam 22, which is outgoing from a laser diode 21, goes to be a parallel light with a collimator lens 23 and transmits a polarizing beam spriter 24 and a 1/4 wavelength board 25. Then, the laser beam 22 goes to be the light of a circularly polarized light from a linearly polarized light and it is condensed by an objective lens 26 and irradiated as a spot light on an optical disk 27. Here, beams 22b and 22c for focusing and tracking control can be utilized also as a beam for focusing control by giving them an angle with diffraction gratings 28a and 28b and projecting them through mirrors 29a and 29b on the optical disk 27. Thus, both the device and the adjustment are simplified.
JP22577387A 1987-09-08 1987-09-08 Pick-up device for optical disk Pending JPS6467723A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22577387A JPS6467723A (en) 1987-09-08 1987-09-08 Pick-up device for optical disk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22577387A JPS6467723A (en) 1987-09-08 1987-09-08 Pick-up device for optical disk

Publications (1)

Publication Number Publication Date
JPS6467723A true JPS6467723A (en) 1989-03-14

Family

ID=16834567

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22577387A Pending JPS6467723A (en) 1987-09-08 1987-09-08 Pick-up device for optical disk

Country Status (1)

Country Link
JP (1) JPS6467723A (en)

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