Galvano motor and galvano motor system

Details Galvano motor and galvano motor system Galvano motor and galvano motor system

2009-04-22

2011-10-04

Phan, James (Department: 2872)

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

C359S198100, C359S199100, C359S221300, C250S236000

Reexamination Certificate

active

08031386

ABSTRACT:
A galvano motor10includes a motor shaft1, a coil5which rotationally drives the motor shaft1, and an encoder scale6which is joined to one end of the rotating shaft, the motor shaft1is configured so that a mirror9which is heavier than the encoder scale6at the other end opposite to the one end to which the encoder scale6is joined, a phase crossover frequency fphase in open-loop characteristics of the galvano motor10, a torsion resonance frequency fscale between a center part of the motor shaft1and the encoder scale6, and a torsion resonance frequency fmirror between the center part of the motor shaft1and the mirror9satisfy the relation of fphase<fscale≦fmirror, and phases at the torsion resonance frequencies fscale and fmirror are other than −180 degrees.

REFERENCES:
patent: 2005/0128553 (2005-06-01), Toyama et al.
patent: 2003-084224 (2003-03-01), None

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