JPS6453357A - Lens actuator - Google Patents
Lens actuatorInfo
- Publication number
- JPS6453357A JPS6453357A JP21109287A JP21109287A JPS6453357A JP S6453357 A JPS6453357 A JP S6453357A JP 21109287 A JP21109287 A JP 21109287A JP 21109287 A JP21109287 A JP 21109287A JP S6453357 A JPS6453357 A JP S6453357A
- Authority
- JP
- Japan
- Prior art keywords
- objective lens
- magnetic flux
- holding cylinder
- thin cylindrical
- lens holding
- 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
Links
Landscapes
- Optical Recording Or Reproduction (AREA)
Abstract
PURPOSE:To make feed to a movable part unnecessary, to respond to a fast operation, and to obtain a lens actuator with high reliability, by using a thin cylindrical magnet as an objective lens holding cylinder, and using a permanent magnet as the movable part. CONSTITUTION:An objective lens 3 is connected with rigidity on the objective lens holding cylinder 6 consisting of a thin cylindrical permanent magnet magnetized in a radial direction. The objective lens holding cylinder 6 performs rotational motion centering the rotation of a supporting shaft 2 by the mutual function of magnetic flux generated from a coil 4 for adjusting tracking provided in the inner local plane of a yoke part 8 and the magnetic flux generated from the thin cylindrical magnet 6. Also, the magnetic flux generated from a coil 5 for adjusting focusing provided on the inner local plane of a second yoke part 10 traverses the second yoke part 10 and a first yoke part 9. The objective lens holding cylinder 6 moves in a direction parallel with the supporting shaft 2 by the mutual function of the magnetic flux and the one generated from the thin cylindrical magnet 6. In such a way, it is possible to obtain the lens actuator without necessitating the feed to the movable part, with high reliability, and capable of performing the fast operation.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21109287A JPS6453357A (en) | 1987-08-25 | 1987-08-25 | Lens actuator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21109287A JPS6453357A (en) | 1987-08-25 | 1987-08-25 | Lens actuator |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6453357A true JPS6453357A (en) | 1989-03-01 |
Family
ID=16600280
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP21109287A Pending JPS6453357A (en) | 1987-08-25 | 1987-08-25 | Lens actuator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6453357A (en) |
-
1987
- 1987-08-25 JP JP21109287A patent/JPS6453357A/en active Pending
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