Driving apparatus and optical apparatus

Details Driving apparatus and optical apparatus Driving apparatus and optical apparatus

1996-09-04

1999-08-03

Ip, Paul

Electricity: motive power systems

Positional servo systems

318268, 318561, 359813, 359814, 359824, H02P 500, G03B 300

Patent

active

059329840

ABSTRACT:
A driving apparatus includes a permanent magnet magnetized so as to have a plurality of poles, a coil for making a magnetic field by the application of a voltage thereto, and creating a force between itself and the permanent magnet, the force created between the coil and the permanent magnet driving an object to be driven, a position detecting means for detecting the position of the object to be driven by using a magnetic flux of the permanent magnet, and a feedback circuit for feeding back information corresponding to the voltage applied to the coil to the position information of the object to be driven obtained by the position detector. The driving apparatus may be used in an optical apparatus.

REFERENCES:
patent: 4626077 (1986-12-01), Yamaoto
patent: 4912494 (1990-03-01), Tanaka et al.
patent: 5072162 (1991-12-01), Sato et al.
patent: 5117246 (1992-05-01), Takahasi et al.
patent: 5289318 (1994-02-01), Sekine et al.
patent: 5572372 (1996-11-01), Sekine et al.
patent: 5590236 (1996-12-01), Sato et al.

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