Title: Pivoting mirror device

Abstract: A pivoting mirror device for pivoting a pivoting mirror about two mutually perpendicular pivoting axes under the influence of electric control signals, in particular for a video player which reads information from a video disk with the aid of a light beam using optical means, the mirror being journalled so as to be pivotable to all sides and the device comprising electro-dynamic drive means which include permanent magnets and control coils for controlling the pivoting movements. The mirror is supported near its center, while permanent magnetic positioning means which co-operate with permanent magnetic means which are connected to the mirror continually subject the bearing to pressure. In order to obtain a high efficiency the permanent magnetic drive means are magnetized in such a way that the magnetic field lines, at least at the location of the control coils, extend substantially parallel to the reflecting surface of the mirror, while moreover at least a part of the turns of the control coils extend parallel to the reflecting surface and transversely to said field lines.

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Inventors: Lakerveld, Herman G. (Eindhoven, NL)
VAN Rosmalen, Gerard E. (Eindhoven, NL)

Application Number: 638510
Filing Date: 1975-12-08
Publication_date: 1978-02-14
Assignee: U.S. Philips Corporation (New York, NY)
Primary Class(es): 359/223 348/195, 359/876
Other Classes:
US Patent Ref:

1918358	Jul, 1933	Walton	350/6.
2034583	Mar, 1936	Koch	350/6.
2535495	Dec, 1950	James	274/13.
3532408	Oct, 1970	Dostal	350/7.
3544221	Dec, 1970	Putnam	350/7.
3871663	Mar, 1975	Stave	274/10.
3891299	Jun, 1975	Rushing	350/6.
3946166	Apr, 1976	Wossidlo	179/100.

Other Refs: 354117

Sep, 1957	CH

Primary Examiner: Corbin, John K.
Assistant Examiner: DE LOS Reyes, B. W.
Attorney: Trifari; Frank R., Cohen; Simon L.