Optical deflector

Details Optical deflector Optical deflector

1993-09-28

1995-08-01

Ben, Loha

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359212, 359226, 359508, G02B 2608

Patent

active

054384478

ABSTRACT:
The improved optical deflector including a rotating shaft that is supported freely rotatable around the body of a motor, as well as an optical deflecting element and a magnet that are both fitted around the rotating shaft is further provided with a turbulence forming member in the neighborhood of the rotating element which is composed of the rotating shaft, the optical deflecting element and the magnet. The air stream generated by the rotation of the optical deflecting element is transformed to turbulences so as to block the development of a "negative" pressure in the space between a stator coil base (fixed member) and the magnet (rotating member). Therefore, the grease can be prevented from splashing in the optical deflector that uses ball bearings; in the case where the optical deflector is of a type that uses a dynamic pressure spindle, the galling of the spindle can be prevented.

REFERENCES:
Lambiotte and Yates, IBM Technical Disclosure Bulletin vol. 18 No. 6 Nov. 1975 pp. 1709-1710.

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