Electrodynamic actuator for an optical writing and

专利名称：Electrodynamic actuator for an optical

writing and reading assembly

发明人：MEYER, KARL-HANNS, DR. ING.,HONDS, LEO申请号：EP89202101.5申请日：19890817公开号：EP0355920B1公开日：19940601

摘要：The invention relates to an electrodynamic activator for an optical writing andreading assembly (11) which is aligned with respect to signal tracks of a storage mediumin order to direct a bundled light beam (13) onto a work position, in which… - the opticalassembly (11) is arranged on a movable permanent magnet arrangement (5, 5a) which canbe moved in mutually perpendicular focusing (z) and radial (x) directions by means ofstationary coils (17a, 17b) 19a, 19b) located in its vicinity, the coils being located on eitherside of the permanent magnet arrangement (5, 5a) in the radial direction (x) and themagnetisation of the permanent magnet arrangement being selected in such a way thatits 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 theoptical assembly (11) is arranged in the magnetic field of the coils at the free ends ofspring bars (3) which are gripped at one end,… - the spring bars (3) carry the permanentmagnet arrangement (5, 5a) so as to be movable perpendicularly to the focusing andradial direction. ……

申请人：PHILIPS PATENTVERWALTUNG GMBH,PHILIPS

PATENTVERWALTUNG,PHILIPS PATENTVERWALTUNG GMBH,N.V. PHILIPS'

GLOEILAMPENFABRIEKEN,PHILIPS NV,N.V. PHILIPS' GLOEILAMPENFABRIEKEN

地址：DE,NL

国籍：DE,NL

代理机构：Kupfermann, Fritz-Joachim, Dipl.-Ing.

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