Scanning optical apparatus

Details Scanning optical apparatus Scanning optical apparatus

1997-10-30

2000-02-29

Phan, James

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359198, 359216, 347260, 310 905, 384121, G02B 2608

Patent

active

060316519

ABSTRACT:
A scanning optical apparatus has a stationary shaft and a rotary sleeve rotatably fitting to each other. The apparatus is arranged to deflection-scan a light beam by rotating a rotary polygon mirror attached to the rotary sleeve. In the apparatus a second permanent magnet, which is repulsive to a first permanent magnet mounted on the stationary shaft, is disposed on a lower end side of the rotary sleeve. Further, a third permanent magnet is placed on a base to which the stationary shaft is fixed so that the third magnet can provide a repulsive force in a direction to urge the second permanent magnet toward the first permanent magnet.

REFERENCES:
patent: 4726640 (1988-02-01), Iwama et al.
patent: 5019738 (1991-05-01), Weilbach et al.
patent: 5069515 (1991-12-01), Itami et al.
patent: 5270737 (1993-12-01), Nakasugi et al.

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