Title:
【考案の名称】光学書込みまたは読出しユニットのエレクトロダイナミックアクチュエータ
Document Type and Number:
Japanese Patent JP2604674
Kind Code:
Y2
Abstract:
The invention relates to an electrodynamic activator for an optical writing and reading assembly (11) which is aligned with respect to signal tracks of a storage medium in order to direct a bundled light beam (13) onto a work position, in which
- the optical assembly (11) is arranged on a movable permanent magnet arrangement (5, 5a) which can be moved in mutually perpendicular focusing (z) and radial (x) directions by means of stationary coils (17a, 17b) 19a, 19b) located in its vicinity, the coils being located on either side of the permanent magnet arrangement (5, 5a) in the radial direction (x) and the magnetisation of the permanent magnet arrangement being selected in such a way that its magnetic field has both an x and a z component in the region of the coil parts (17c, 17d, 19c, 19d) lying opposite it,
- the permanent magnet arrangement (5, 5a) with the optical assembly (11) is arranged in the magnetic field of the coils at the free ends of spring bars (3) which are gripped at one end,
- the spring bars (3) carry the permanent magnet arrangement (5, 5a) so as to be movable perpendicularly to the focusing and radial direction.
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Inventors:
Karl-Hansmeyer
Leo Hons
Leo Hons
Application Number:
JP590398U
Publication Date:
May 22, 2000
Filing Date:
August 05, 1998
Export Citation:
Assignee:
Konin Krekka Philips Electronics NV
International Classes:
G11B7/08; G11B7/09; (IPC1-7): G11B7/09
Domestic Patent References:
| JP5862836A | ||||
| JP6185640A | ||||
| JP6139241A | ||||
| JP6218826U |
Attorney, Agent or Firm:
Akihide Sugimura (5 outside)
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