Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1993-07-21
1995-07-04
Ben, Loha
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359217, 310 56, 310 61, 310 905, 310267, G02B 2608
Patent
active
054305705
ABSTRACT:
The present invention provides a light deflector which effectively cools a rotation torque generation portion, which leads to miniaturization of the apparatus and economy of electric power. The light deflector according to the present invention having a rotating polygonal mirror having mirrors on its side faces, a rotation sleeve fixed to the rotating polygonal mirror, a magnet yoke including magnets fixed to the rotation sleeve, a fixed shaft inserted into the rotation sleeve, a housing supporting the fixed shaft, a stator core fixed to the housing and constituting an electromagnetic circuit by magnetically interacting with the magnet yoke to generate rotation torque, and a substrate on which the stator core is mounted and a part of which is extended outside through a substrate insertion slot, is characterized in that at least one air hole is formed at least in the magnet yoke between the magnet yoke and stator core and an air inflow hole is formed substantially adjacent to the substrate insertion slot of the substrate of the housing.
REFERENCES:
patent: 5172021 (1992-12-01), Takahashi et al.
Ben Loha
Fuji 'Xerox Co., Ltd.
Ramaswamy Suma N.
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