JPS55142425A - Driving unit of objective lens - Google Patents

Driving unit of objective lens

Info

Publication number
JPS55142425A
JPS55142425A JP5060579A JP5060579A JPS55142425A JP S55142425 A JPS55142425 A JP S55142425A JP 5060579 A JP5060579 A JP 5060579A JP 5060579 A JP5060579 A JP 5060579A JP S55142425 A JPS55142425 A JP S55142425A
Authority
JP
Japan
Prior art keywords
objective lens
fixed
holding frame
liquid
another end
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
JP5060579A
Other languages
Japanese (ja)
Inventor
Toru Musha
Takashi Hamaoka
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.)
Olympus Corp
Original Assignee
Olympus Optical 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 Olympus Optical Co Ltd filed Critical Olympus Optical Co Ltd
Priority to JP5060579A priority Critical patent/JPS55142425A/en
Publication of JPS55142425A publication Critical patent/JPS55142425A/en
Pending 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
    • G11B7/0925—Electromechanical actuators for lens positioning
    • G11B7/0932—Details of sprung supports

Landscapes

  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To obtain sufficient brake force with small size and light weight, by moving the objective lens toward vertical direction to the light axis of objective lens and the information traffic via liquid damper, in the optical reader such as video disc. CONSTITUTION:The objective lens 1 is held at the holding frame 2, one end of the plate springs 3, 3' is fixed to the holding frame 2, and another end of the plate spring is fixed to the fixed members 6, 6'. The plate springs 3, 3' cause torsional deformation while more or less turning the objective lens 1 and the holding frame 2 toward the direction A vertical to the light axis. The absorbing force of the electromagnets 5, 5' displaces the objective lens 1 toward the direction A. One end of the moving rigid bodies 4, 4' is fixed to the holding frame 2, and another end is used as a part of the liquid damper. That is, the plates 6A, 6B, 6A', 6B' are provided so that another end of the moving rigid bodies 4, 4' is clipped. This is fixed to the fixing members 6, 6'. When the liquid having viscosity is filled in the gaps 7A, 7B, 7A', 7B' between the fixed member and the plate, braking force is given with the liquid with viscosity in case of movement of the lens 1.
JP5060579A 1979-04-24 1979-04-24 Driving unit of objective lens Pending JPS55142425A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5060579A JPS55142425A (en) 1979-04-24 1979-04-24 Driving unit of objective lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5060579A JPS55142425A (en) 1979-04-24 1979-04-24 Driving unit of objective lens

Publications (1)

Publication Number Publication Date
JPS55142425A true JPS55142425A (en) 1980-11-07

Family

ID=12863590

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5060579A Pending JPS55142425A (en) 1979-04-24 1979-04-24 Driving unit of objective lens

Country Status (1)

Country Link
JP (1) JPS55142425A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57113431A (en) * 1981-01-07 1982-07-14 Olympus Optical Co Ltd Objective-lens driver
JPS57117133A (en) * 1981-01-09 1982-07-21 Olympus Optical Co Ltd Objective lens drive device
JPS57117134A (en) * 1981-01-09 1982-07-21 Olympus Optical Co Ltd Objective lens drive device
JPS5852643U (en) * 1981-10-06 1983-04-09 日立金属株式会社 actuator
JPS5862832A (en) * 1981-10-07 1983-04-14 Sanyo Electric Co Ltd Lens driving mechanism of optical disk player
JPS58175144A (en) * 1982-04-05 1983-10-14 Nippon Telegr & Teleph Corp <Ntt> Optical head

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57113431A (en) * 1981-01-07 1982-07-14 Olympus Optical Co Ltd Objective-lens driver
JPS57117133A (en) * 1981-01-09 1982-07-21 Olympus Optical Co Ltd Objective lens drive device
JPS57117134A (en) * 1981-01-09 1982-07-21 Olympus Optical Co Ltd Objective lens drive device
JPS5852643U (en) * 1981-10-06 1983-04-09 日立金属株式会社 actuator
JPS5862832A (en) * 1981-10-07 1983-04-14 Sanyo Electric Co Ltd Lens driving mechanism of optical disk player
JPS58175144A (en) * 1982-04-05 1983-10-14 Nippon Telegr & Teleph Corp <Ntt> Optical head

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