JPS57179954A - Optical type disc player - Google Patents

Optical type disc player

Info

Publication number
JPS57179954A
JPS57179954A JP6373881A JP6373881A JPS57179954A JP S57179954 A JPS57179954 A JP S57179954A JP 6373881 A JP6373881 A JP 6373881A JP 6373881 A JP6373881 A JP 6373881A JP S57179954 A JPS57179954 A JP S57179954A
Authority
JP
Japan
Prior art keywords
optical axis
objective lens
disc
auxiliary
pickup
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
JP6373881A
Other languages
Japanese (ja)
Other versions
JPH0219538B2 (en
Inventor
Takashi Ito
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Priority to JP6373881A priority Critical patent/JPS57179954A/en
Publication of JPS57179954A publication Critical patent/JPS57179954A/en
Publication of JPH0219538B2 publication Critical patent/JPH0219538B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/095—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following specially adapted for discs, e.g. for compensation of eccentricity or wobble
    • G11B7/0956—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following specially adapted for discs, e.g. for compensation of eccentricity or wobble to compensate for tilt, skew, warp or inclination of the disc, i.e. maintain the optical axis at right angles to the disc

Landscapes

  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To increase the resolution of signal detection, by holding a pickup freely shakingably so that the focus of an objective lens is a center of displacement and controlling servo so that the optical axis of the pickup is vertical to a disc plane. CONSTITUTION:An auxiliary optical beam from an auxiliary light source 41 for slope detection is supplied to a lens 3 in parallel with an optical axis from a location shifted by a specified amount from an optical axis of an objective lens 3. When a disc 4 is tilted as broken lines or one dot chain lines, the auxiliary optical beam is reflected respectively as broken lines or one dot chain lines, and a signal to drive electromagnetic coils 34a and 34b is formed based on an output of photodetectors 42a and 42b, and objective lens 3 is displaced and servo is given so that the optical axis is vertical to the disc 4.
JP6373881A 1981-04-27 1981-04-27 Optical type disc player Granted JPS57179954A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6373881A JPS57179954A (en) 1981-04-27 1981-04-27 Optical type disc player

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6373881A JPS57179954A (en) 1981-04-27 1981-04-27 Optical type disc player

Publications (2)

Publication Number Publication Date
JPS57179954A true JPS57179954A (en) 1982-11-05
JPH0219538B2 JPH0219538B2 (en) 1990-05-02

Family

ID=13238047

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6373881A Granted JPS57179954A (en) 1981-04-27 1981-04-27 Optical type disc player

Country Status (1)

Country Link
JP (1) JPS57179954A (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5968830A (en) * 1982-10-14 1984-04-18 Toshiba Corp Reproducer of optical information
EP0116467A2 (en) * 1983-02-10 1984-08-22 Sony Corporation Optical disc players
FR2549272A1 (en) * 1983-06-24 1985-01-18 Pioneer Electronic Corp APPARATUS FOR OPTICALLY READING RECORDED INFORMATION
EP0148028A2 (en) * 1983-12-29 1985-07-10 Sony Corporation Optical information reproducing apparatus
JPS60120522U (en) * 1984-01-23 1985-08-14 パイオニア株式会社 Optical recording information reading device
JPS60123763U (en) * 1984-01-30 1985-08-21 パイオニア株式会社 Recorded information reproducing device
JPS60135817U (en) * 1984-02-21 1985-09-09 パイオニア株式会社 Optical information reading device
EP0189932A2 (en) * 1985-01-31 1986-08-06 Fujitsu Limited Track servo system for controllably projecting an optical beam to an optical disk
US4634853A (en) * 1983-04-27 1987-01-06 Pioneer Electronic Corporation Optical information reading apparatus
US4742506A (en) * 1984-07-12 1988-05-03 Sony Corporation Tracking error detecting apparatus for an optical head with skew error reduction by using an inclined header portion
US4773052A (en) * 1984-09-20 1988-09-20 Pioneer Electronic Corporation Dual mode disk player/recorder
US4780865A (en) * 1983-07-29 1988-10-25 Sony Corporation Optical information reproducing apparatus with tilt correction including projection and detection of a same diffusely illuminated field
JPH04132618U (en) * 1991-05-30 1992-12-09 ミツミ電機株式会社 optical disk device
US7577076B2 (en) 2003-03-14 2009-08-18 Ricoh Company, Ltd. Tilt sensor using diffraction grating

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5262403A (en) * 1975-11-19 1977-05-23 Fuji Telecasting Co Ltd Photoelectric reproducer
JPS5328403A (en) * 1976-08-28 1978-03-16 Olympus Optical Co Ltd Optical information reader of disc from magnetic recording media
JPS5425403A (en) * 1977-07-27 1979-02-26 Toshiba Corp Electric core
JPS5593541A (en) * 1979-01-10 1980-07-16 Pioneer Video Corp Polarization mirror driving unit in optical information reader
JPS566483A (en) * 1979-06-27 1981-01-23 Sharp Corp Double current contraction type light emiting diode

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5262403A (en) * 1975-11-19 1977-05-23 Fuji Telecasting Co Ltd Photoelectric reproducer
JPS5328403A (en) * 1976-08-28 1978-03-16 Olympus Optical Co Ltd Optical information reader of disc from magnetic recording media
JPS5425403A (en) * 1977-07-27 1979-02-26 Toshiba Corp Electric core
JPS5593541A (en) * 1979-01-10 1980-07-16 Pioneer Video Corp Polarization mirror driving unit in optical information reader
JPS566483A (en) * 1979-06-27 1981-01-23 Sharp Corp Double current contraction type light emiting diode

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5968830A (en) * 1982-10-14 1984-04-18 Toshiba Corp Reproducer of optical information
JPS6322369B2 (en) * 1982-10-14 1988-05-11 Tokyo Shibaura Electric Co
EP0116467A2 (en) * 1983-02-10 1984-08-22 Sony Corporation Optical disc players
US4634853A (en) * 1983-04-27 1987-01-06 Pioneer Electronic Corporation Optical information reading apparatus
US4607357A (en) * 1983-06-24 1986-08-19 Pioneer Electronic Corporation Optical pickup apparatus for recorded information with tilt indication
FR2549272A1 (en) * 1983-06-24 1985-01-18 Pioneer Electronic Corp APPARATUS FOR OPTICALLY READING RECORDED INFORMATION
US4780865A (en) * 1983-07-29 1988-10-25 Sony Corporation Optical information reproducing apparatus with tilt correction including projection and detection of a same diffusely illuminated field
EP0148028A2 (en) * 1983-12-29 1985-07-10 Sony Corporation Optical information reproducing apparatus
JPS60120522U (en) * 1984-01-23 1985-08-14 パイオニア株式会社 Optical recording information reading device
JPH0433548Y2 (en) * 1984-01-23 1992-08-11
JPS60123763U (en) * 1984-01-30 1985-08-21 パイオニア株式会社 Recorded information reproducing device
US4680744A (en) * 1984-01-30 1987-07-14 Pioneer Electronic Corporation Disc player having pick-up tilt servo system combined with disc presence detection circuits
JPS642265Y2 (en) * 1984-01-30 1989-01-19
JPS60135817U (en) * 1984-02-21 1985-09-09 パイオニア株式会社 Optical information reading device
US4742506A (en) * 1984-07-12 1988-05-03 Sony Corporation Tracking error detecting apparatus for an optical head with skew error reduction by using an inclined header portion
US4773052A (en) * 1984-09-20 1988-09-20 Pioneer Electronic Corporation Dual mode disk player/recorder
EP0189932A2 (en) * 1985-01-31 1986-08-06 Fujitsu Limited Track servo system for controllably projecting an optical beam to an optical disk
JPH04132618U (en) * 1991-05-30 1992-12-09 ミツミ電機株式会社 optical disk device
US7577076B2 (en) 2003-03-14 2009-08-18 Ricoh Company, Ltd. Tilt sensor using diffraction grating

Also Published As

Publication number Publication date
JPH0219538B2 (en) 1990-05-02

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