Method and apparatus for rotating one or more mirrors in a beam

Details Method and apparatus for rotating one or more mirrors in a beam Method and apparatus for rotating one or more mirrors in a beam

1987-06-18

1988-12-20

Corbin, John K.

350 65, 350582, 350583, G02B 2610

Patent

active

047921986

ABSTRACT:
A method and apparatus for rotating one or more mirrors in a beam scanning system includes a drive motor, a drive spindle, operatively connected to the drive motor, for rotation by the motor, a spindle support arrangement, and a mirror support wheel mounted on the spindle for rotation therewith. The spindle support arrangement includes a generally cylindrical spindle housing and a bearing mounted within the housing a predetermined distance from an open end thereof. The spindle extends through the spindle housing and the bearing and out of the open end of the spindle housing. The mirror support wheel defines a generally annular counter bore for receiving the open end of the spindle housing thereinto. The mirror support wheel further defines a central spindle engaging portion which is radially inward of the annular counter bore, the central spindle engaging portion has an inner surface facing the bearing and spaced therefrom by a distance which is sufficient to substantially reduce the Bernoulli effect pressure drop in the region within the spindle housing adjacent the side of the bearing facing the inner surface when the mirror support wheel is rotated by the spindle. The inner surface of the central spindle engaging portion of the mirror support wheel may be spaced from the bearing by a distance of approximately 0.200 inches.

REFERENCES:
patent: 4154507 (1979-05-01), Barr
patent: 4367912 (1983-01-01), Kitamura
patent: 4512626 (1985-04-01), Kamiya et al.
patent: 4609251 (1986-09-01), Nakaoka et al.
patent: 4623216 (1986-11-01), Sato et al.

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