JPS6457429A - Lens focusing actuator - Google Patents
Lens focusing actuatorInfo
- Publication number
- JPS6457429A JPS6457429A JP21392287A JP21392287A JPS6457429A JP S6457429 A JPS6457429 A JP S6457429A JP 21392287 A JP21392287 A JP 21392287A JP 21392287 A JP21392287 A JP 21392287A JP S6457429 A JPS6457429 A JP S6457429A
- Authority
- JP
- Japan
- Prior art keywords
- moving part
- ring
- permanent magnet
- constituted
- parts
- 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 easily make a mechanism high in accuracy and to make feeding to a moving part unnecessary by using a magnet moving type linear actuator, and constituting moving part parts of all ring-shaped parts. CONSTITUTION:A permanent magnet is constructed a moving part and all moving part parts are constituted of ring-shaped parts. At both edges of a cylindrical permanent magnet 105 composed of the mixture of a rare earth permanent magnet powder and a resin magnetized in the length-wise direction, ring-shaped auxiliary magnetic poles 103 and 104 obtained by sintering after a molding assistant is added to an iron (Fe) powder, etc., and a pressed powder molding is executed are provided. A lens holder 102 is joined to an auxiliary magnetic pole 103, coils 107 and 108 are distributed to the outside of a plastic sleeve 106, a magnetic circuit is constituted by a yoke 109, and when the current in the direction reverse to the coils 107 and 108 flows, an objective lens 101 is operated in the upper and lower directions. Thus, since a resin coupling type rare earth permanent magnet 105 is used for the moving part, the feeding to the moving part is made unnecessary, and since the moving part is all constituted of the ring-shaped parts, the high accuracy can be easily achieved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21392287A JPS6457429A (en) | 1987-08-27 | 1987-08-27 | Lens focusing actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21392287A JPS6457429A (en) | 1987-08-27 | 1987-08-27 | Lens focusing actuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6457429A true JPS6457429A (en) | 1989-03-03 |
Family
ID=16647264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21392287A Pending JPS6457429A (en) | 1987-08-27 | 1987-08-27 | Lens focusing actuator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6457429A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999054873A1 (en) * | 1998-04-17 | 1999-10-28 | Koninklijke Philips Electronics N.V. | Optical scanning device comprising a main lens and an auxiliary lens |
| WO1999054872A1 (en) * | 1998-04-17 | 1999-10-28 | Koninklijke Philips Electronics N.V. | Optical scanning device comprising a lens system with a compact actuator |
-
1987
- 1987-08-27 JP JP21392287A patent/JPS6457429A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999054873A1 (en) * | 1998-04-17 | 1999-10-28 | Koninklijke Philips Electronics N.V. | Optical scanning device comprising a main lens and an auxiliary lens |
| WO1999054872A1 (en) * | 1998-04-17 | 1999-10-28 | Koninklijke Philips Electronics N.V. | Optical scanning device comprising a lens system with a compact actuator |
| US6130789A (en) * | 1998-04-17 | 2000-10-10 | U.S. Philips Corporation | Optical scanning device comprising a lens system with a compact actuator |
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