Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Reexamination Certificate
2006-08-01
2006-08-01
Phan, James (Department: 2872)
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
C359S213100, C359S214100, C359S223100, C359S224200
Reexamination Certificate
active
07085030
ABSTRACT:
An optical scanner driving apparatus comprises a moving plate having a reflection plane and a driving coil, a magnetic field generating section arranged in a vicinity of the moving plate, a driving circuit to supply a driving signal to the driving coil, a first output acquiring section to acquire an output containing an electromotive force generated in the driving coil by an electromagnetic induction, a second output acquiring section comprising an impedance element having a corresponding impedance to an impedance of the driving coil, to acquire an output generated by the impedance element by supplying the driving signal to the impedance element, and a control circuit to control a state of the torsional vibration of the moving plate according to the electromotive force generated in the driving coil on the basis of the outputs acquired by the first output acquiring section and the second output acquiring section.
REFERENCES:
patent: 5606447 (1997-02-01), Asada et al.
patent: 6188504 (2001-02-01), Murakami et al.
patent: 6775039 (2004-08-01), Sakai
patent: 6838661 (2005-01-01), Klement
patent: 10-207973 (1998-08-01), None
Olympus Corporation
Phan James
Scully , Scott, Murphy & Presser, P.C.
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