JPS57200949A - Optical recording information reader - Google Patents

Optical recording information reader

Info

Publication number
JPS57200949A
JPS57200949A JP8388181A JP8388181A JPS57200949A JP S57200949 A JPS57200949 A JP S57200949A JP 8388181 A JP8388181 A JP 8388181A JP 8388181 A JP8388181 A JP 8388181A JP S57200949 A JPS57200949 A JP S57200949A
Authority
JP
Japan
Prior art keywords
objective lens
cylindrical magnet
arm
fixed
frame
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
JP8388181A
Other languages
Japanese (ja)
Inventor
Fusakichi Kido
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 JP8388181A priority Critical patent/JPS57200949A/en
Publication of JPS57200949A publication Critical patent/JPS57200949A/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

Landscapes

  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To prevent the shifting of an optical axis during focusing, by supporting an objective lens system at its gravity center position in an optical information reproducing device which has the objective lens system atop of an arm supported by a gimbals. CONSTITUTION:A frame 13 is coupled with the tip of an arm 3, springs 14 are provided on the upper and lower end surfaces of the frame 13, and an objective lens 15 is suspended through those springs 14. A cylindrical magnet 16 is fixed closely around the external circumference part of the lens bacrel of the objective lens 15. Further, a focusing coil 17 is provided around the external circumference of the cylindrical magnet 16. A fixed stanchion 20 fixed on a base at one end is fitted to a wire 19. Since the height-directional centers of the focusing coil 17 and cylindrical magnet 16 nearly coincide with the center of gravity of the objective lens 15, so no torsional force is produced at the objective lens 15 when the arm is in motion in the direction of tracking correction.
JP8388181A 1981-06-02 1981-06-02 Optical recording information reader Pending JPS57200949A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8388181A JPS57200949A (en) 1981-06-02 1981-06-02 Optical recording information reader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8388181A JPS57200949A (en) 1981-06-02 1981-06-02 Optical recording information reader

Publications (1)

Publication Number Publication Date
JPS57200949A true JPS57200949A (en) 1982-12-09

Family

ID=13814994

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8388181A Pending JPS57200949A (en) 1981-06-02 1981-06-02 Optical recording information reader

Country Status (1)

Country Link
JP (1) JPS57200949A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5986983A (en) * 1997-11-19 1999-11-16 Eastman Kodak Company Multiple degrees of freedom actuator for optical recording
CN103462632A (en) * 2013-09-23 2013-12-25 江苏美伦影像系统有限公司 Digital X-ray camera

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5986983A (en) * 1997-11-19 1999-11-16 Eastman Kodak Company Multiple degrees of freedom actuator for optical recording
CN103462632A (en) * 2013-09-23 2013-12-25 江苏美伦影像系统有限公司 Digital X-ray camera

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