Dynamic pressure bearing and rotary polygon mirror device with t

Details Dynamic pressure bearing and rotary polygon mirror device with t Dynamic pressure bearing and rotary polygon mirror device with t

1993-04-20

1995-07-18

Popek, Joseph A.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359196, 359197, 359212, 359217, G02B 2610

Patent

active

054346959

ABSTRACT:
A rotary polygon mirror device comprises: a rotor including a polygon mirror secured to one end face of a cylinder, a central rod secured inside said cylinder in such a manner that the central rod is extended along the axis of the cylinder, and a thrust bearing magnet secured to the end face of the central rod, said magnet; and a casing coaxially surrounding the cylinder with a gap therebetween. In the device, the gap provides radial bearing means, and the cylinder and the casing are made equal in thermal expansion coefficient.

REFERENCES:
patent: 4512626 (1985-04-01), Kamiya et al.
patent: 4623216 (1986-11-01), Sato et al.
patent: 4934781 (1990-06-01), Kato et al.
patent: 4934836 (1990-06-01), Tanaka et al.

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