JPS57189105A - Driving device for objective lens - Google Patents
Driving device for objective lensInfo
- Publication number
- JPS57189105A JPS57189105A JP7409181A JP7409181A JPS57189105A JP S57189105 A JPS57189105 A JP S57189105A JP 7409181 A JP7409181 A JP 7409181A JP 7409181 A JP7409181 A JP 7409181A JP S57189105 A JPS57189105 A JP S57189105A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- objective lens
- driving device
- fixed
- loop
- 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
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
Abstract
PURPOSE:To obtain a driving device with less magnetic loss, by performing magnetic shield on the surface other than parts required for the specified magnetic loop formation for a fixed magnetic device and a moving magnetic member for objective lens driving. CONSTITUTION:On the surface of a fixed magnetic device 1 and a moving magnetic member 2 not contributing to the formation of a magnetic loop (a) with the device 1 and the member 2 constituting an objective lens driving device and a magnetic loop (a') generated from fixed coils 3 and 3' wound around the device 1, magnetic shield films 24 and 24' as shown in hatched lines are provided. That is, all the surfaces not wound with the fixed coils 3 and 3' of the device 1 and all side surfaces other than magnetic flux interlinking surfaces (upper and lower surfaces) of the member 2 are covered with the magnetic shield members 24 and 24'.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7409181A JPS57189105A (en) | 1981-05-19 | 1981-05-19 | Driving device for objective lens |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7409181A JPS57189105A (en) | 1981-05-19 | 1981-05-19 | Driving device for objective lens |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57189105A true JPS57189105A (en) | 1982-11-20 |
Family
ID=13537157
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7409181A Pending JPS57189105A (en) | 1981-05-19 | 1981-05-19 | Driving device for objective lens |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57189105A (en) |
-
1981
- 1981-05-19 JP JP7409181A patent/JPS57189105A/en active Pending
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