JPS647344A - Device for driving objective lens - Google Patents

Device for driving objective lens

Info

Publication number
JPS647344A
JPS647344A JP16304287A JP16304287A JPS647344A JP S647344 A JPS647344 A JP S647344A JP 16304287 A JP16304287 A JP 16304287A JP 16304287 A JP16304287 A JP 16304287A JP S647344 A JPS647344 A JP S647344A
Authority
JP
Japan
Prior art keywords
focus
objective lens
coil
movable part
track
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
JP16304287A
Other languages
Japanese (ja)
Inventor
Naomasa Takahashi
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
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 filed Critical Toshiba Corp
Priority to JP16304287A priority Critical patent/JPS647344A/en
Publication of JPS647344A publication Critical patent/JPS647344A/en
Pending legal-status Critical Current

Links

Landscapes

  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To reduce the track access time by moving a movable part in parallel with the axis of an objective at focus control and driving the movable part around a shaft at tracking control so as to prevent the objective lens at the focus control from being tilted. CONSTITUTION:In detecting out of focus or track dislocation of a beam spot due to warp or deflection of an optical disk, accurate accessing is implemented by an objective lens driving mechanism. In applying power to a track coil 28, the movable part 14 with a coil 28 provided thereon is driven around a line B passing through the gravity center G by the action of the magnetic field of a magnet 36 against the elastic force of elastic joints 48, 52 to correct the dislocation of the track. On the other hand, in applying power to a focus coil 26, the movable part 14 with the coil 26 fixed thereon is moved in parallel along the line B against the elastic force of elastic joints 48, 52, 58, 64 by the action of the magnetic field of the magnet 36. Thus, the objective lens 18 is driven in the direction of the optical axis to correct the out of focus.
JP16304287A 1987-06-30 1987-06-30 Device for driving objective lens Pending JPS647344A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16304287A JPS647344A (en) 1987-06-30 1987-06-30 Device for driving objective lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16304287A JPS647344A (en) 1987-06-30 1987-06-30 Device for driving objective lens

Publications (1)

Publication Number Publication Date
JPS647344A true JPS647344A (en) 1989-01-11

Family

ID=15766079

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16304287A Pending JPS647344A (en) 1987-06-30 1987-06-30 Device for driving objective lens

Country Status (1)

Country Link
JP (1) JPS647344A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5821004A (en) * 1991-11-29 1998-10-13 Matsushita Electric Industrial Co., Ltd Magneto-optical recording medium and recording and reading out process using the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5821004A (en) * 1991-11-29 1998-10-13 Matsushita Electric Industrial Co., Ltd Magneto-optical recording medium and recording and reading out process using the same

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