JPS54124704A - Optical information reproducer - Google Patents

Optical information reproducer

Info

Publication number
JPS54124704A
JPS54124704A JP3103578A JP3103578A JPS54124704A JP S54124704 A JPS54124704 A JP S54124704A JP 3103578 A JP3103578 A JP 3103578A JP 3103578 A JP3103578 A JP 3103578A JP S54124704 A JPS54124704 A JP S54124704A
Authority
JP
Japan
Prior art keywords
photo
light beam
deflector
detector
lens
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
JP3103578A
Other languages
Japanese (ja)
Inventor
Takashi Yamaguchi
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
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP3103578A priority Critical patent/JPS54124704A/en
Publication of JPS54124704A publication Critical patent/JPS54124704A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To reduce the movement of a light beam in photo detector position by inserting a cylindrical convex lens in the optical path directing reflected light beam to the photo detector.
CONSTITUTION: The light beam from a light source 11 is magnified via photo deflector 114 which is making constant vibrations and is further radiated as a minute spot on an information disc 17 via photo deflector 14 and objective lens 15. The reflected light from the track on a disc 17 is separated with a beam splitter 13 and is received with a photo detector 19 through a cylindrical convex lens 18 which has the axis parallel to the rotaing axis of the photo deflector 114. The information signal and tracking control signal are obtained from the detector 19. Focusing of the lens 15 is accomplished by applying the focusing control signal to a driving coil 16.
COPYRIGHT: (C)1979,JPO&Japio
JP3103578A 1978-03-20 1978-03-20 Optical information reproducer Pending JPS54124704A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3103578A JPS54124704A (en) 1978-03-20 1978-03-20 Optical information reproducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3103578A JPS54124704A (en) 1978-03-20 1978-03-20 Optical information reproducer

Publications (1)

Publication Number Publication Date
JPS54124704A true JPS54124704A (en) 1979-09-27

Family

ID=12320238

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3103578A Pending JPS54124704A (en) 1978-03-20 1978-03-20 Optical information reproducer

Country Status (1)

Country Link
JP (1) JPS54124704A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6142746A (en) * 1984-08-07 1986-03-01 Matsushita Electric Ind Co Ltd Focus position controller

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6142746A (en) * 1984-08-07 1986-03-01 Matsushita Electric Ind Co Ltd Focus position controller

Similar Documents

Publication Publication Date Title
JPS5753832A (en) Method and device for recording of optical information
JPS5587328A (en) Automatic focus control unit
JPS54128303A (en) Optical reproducing device of information recording medium disc
JPS55125417A (en) Photodetector
JPS54124704A (en) Optical information reproducer
JPS55101142A (en) Focus detection unit of optical reproducing device
JPS57200912A (en) Information recording system
JPS57172306A (en) Focus controller of optical recording system
JPS54103307A (en) Optical recorder-reproducer
JPS6452240A (en) Magneto-optical recording and reproducing device
JPS5661046A (en) Optical disc device
JPS56148745A (en) Optical recorder and reproducer
JPS57167145A (en) Optical information reproducing device
JPS567245A (en) Automatic focusing unit in optical information reproducing device
JPS5443756A (en) Optically recording and reproducing apparatus
JPS5584053A (en) Tracking control unit for optical reproducer
JPS5788535A (en) Pickup device
JPS57127935A (en) Pickup device
JPS6440912A (en) Lens for optical recording and reproducing device
JPS57120242A (en) Optical information reproducing device
JPS5570942A (en) Tracking error detector
JPS55125545A (en) Optical information recorder/reproducer
JPS54151806A (en) Method of optically recording plural information signals in recording medium
JPS5698720A (en) Laser spot deflecting system
JPS55105830A (en) Optical recorder/reproducer