JPH04205821A - Objective lens drive device - Google Patents

Objective lens drive device

Info

Publication number
JPH04205821A
JPH04205821A JP32930490A JP32930490A JPH04205821A JP H04205821 A JPH04205821 A JP H04205821A JP 32930490 A JP32930490 A JP 32930490A JP 32930490 A JP32930490 A JP 32930490A JP H04205821 A JPH04205821 A JP H04205821A
Authority
JP
Japan
Prior art keywords
objective lens
drive device
recording medium
lens drive
same
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
JP32930490A
Inventor
Koji Ichikawa
Masamichi Ito
Yoshiaki Yamauchi
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP32930490A priority Critical patent/JPH04205821A/en
Publication of JPH04205821A publication Critical patent/JPH04205821A/en
Application status is Pending legal-status Critical

Links

Abstract

PURPOSE: To achieve overwriting and enable recording and reproduction speed of information to be improved by mounting a plurality of objective lenses to a same bobbin, placing each objective lens in the same track circumferential direction of a recording medium, and driving in focus direction and track direc tion independently.
CONSTITUTION: Detection beams 3a and 3b which are emitted from a fixed optical system 2 are sent to a coarse actuator 4 which runs in radial direction of a recording medium 1, are guided to an objective lens drive device 5a which is mounted to the coarse actuator 4, and are collected onto a target track on a recording medium 1 by objective lenses 6a and 6b, thus enabling information to be recorded and reproduced. At this time, the objective lens is controlled independently by an objective lens drive device 5a using two objective lenses at the same bobbin 12, thus achieving overwriting and at the same time improving recording and reproduction speed.
COPYRIGHT: (C)1992,JPO&Japio
JP32930490A 1990-11-30 1990-11-30 Objective lens drive device Pending JPH04205821A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP32930490A JPH04205821A (en) 1990-11-30 1990-11-30 Objective lens drive device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP32930490A JPH04205821A (en) 1990-11-30 1990-11-30 Objective lens drive device

Publications (1)

Publication Number Publication Date
JPH04205821A true JPH04205821A (en) 1992-07-28

Family

ID=18219965

Family Applications (1)

Application Number Title Priority Date Filing Date
JP32930490A Pending JPH04205821A (en) 1990-11-30 1990-11-30 Objective lens drive device

Country Status (1)

Country Link
JP (1) JPH04205821A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0742552A2 (en) * 1995-05-08 1996-11-13 SANYO ELECTRIC Co., Ltd. Optical pickup device which can be adapted to a plurality of types of optical disks
WO1997042631A1 (en) * 1996-05-09 1997-11-13 Sony Corporation Optical pickup and disk player
WO1997042632A1 (en) * 1996-05-09 1997-11-13 Sony Corporation Optical pickup and disk player
US5721723A (en) * 1994-11-18 1998-02-24 Kabushiki Kaisha Toshiba Objective lens driving device, data recording device, and data reproducing device, all having driver force selectively 120 tutine and positioning the objective lenses
US5856964A (en) * 1997-04-15 1999-01-05 Eastman Kodak Company Multihead optical disc drives with direct reading after writing operation
JP2003005014A (en) * 2001-06-20 2003-01-08 Olympus Optical Co Ltd Actuator for optical element
WO2005038785A3 (en) * 2003-10-21 2005-06-30 Koninkl Philips Electronics Nv Improved arrangement for dual lens actuator
EP1675111A3 (en) * 2004-12-22 2006-10-04 Samsung Electronics Co., Ltd. Optical pickup actuator and optical recording-reproducing apparatus

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5721723A (en) * 1994-11-18 1998-02-24 Kabushiki Kaisha Toshiba Objective lens driving device, data recording device, and data reproducing device, all having driver force selectively 120 tutine and positioning the objective lenses
EP0742552A3 (en) * 1995-05-08 1997-01-08 Sanyo Electric Co Optical pickup device which can be adapted to a plurality of types of optical disks
US5687154A (en) * 1995-05-08 1997-11-11 Sanyo Electric Co., Ltd. Optical pickup device which can be adapted to plurality of types of optical disks
US5870371A (en) * 1995-05-08 1999-02-09 Sanyo Electric Co., Ltd Optical pickup device which can be adapted to plurality of types of optical disks
EP0742552A2 (en) * 1995-05-08 1996-11-13 SANYO ELECTRIC Co., Ltd. Optical pickup device which can be adapted to a plurality of types of optical disks
WO1997042632A1 (en) * 1996-05-09 1997-11-13 Sony Corporation Optical pickup and disk player
WO1997042631A1 (en) * 1996-05-09 1997-11-13 Sony Corporation Optical pickup and disk player
US6097690A (en) * 1996-05-09 2000-08-01 Sony Corporation Optical pickup and disc player
US6172958B1 (en) * 1996-05-09 2001-01-09 Sony Corporation Optical pick-up and disk player
US5856964A (en) * 1997-04-15 1999-01-05 Eastman Kodak Company Multihead optical disc drives with direct reading after writing operation
JP2003005014A (en) * 2001-06-20 2003-01-08 Olympus Optical Co Ltd Actuator for optical element
WO2005038785A3 (en) * 2003-10-21 2005-06-30 Koninkl Philips Electronics Nv Improved arrangement for dual lens actuator
EP1675111A3 (en) * 2004-12-22 2006-10-04 Samsung Electronics Co., Ltd. Optical pickup actuator and optical recording-reproducing apparatus
US7668049B2 (en) 2004-12-22 2010-02-23 Samsung Electronics Co., Ltd. Optical pickup actuator and optical recording/reproducing apparatus

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