Light beam scanning device with opposed deflecting surfaces

Details Light beam scanning device with opposed deflecting surfaces Light beam scanning device with opposed deflecting surfaces

1979-06-05

1981-02-17

Henry, Jon W.

G02B 2717

Patent

active

042511267

ABSTRACT:
A light beam scanning device provided with a rotationally vibrating deflector having at least two deflective and reflective surfaces, a scanning surface subjected to scanning operation with light beam deflected by the deflector, an image-forming optical system interposed between the deflector and the scanning surface to focus the light beam from the deflector onto the scanning surface, and a light source section which emits light beam to the deflector, in which device a first deflected light beam plane to be formed by the deflected light beam immediately before entering the image-forming optical system at the forward movement of the deflector is made parallel with a second deflected light beam plane to be formed by the deflected light beam immediately before entering the image-forming optical system at the return movement of the deflector, and the deflecting direction of each beam to be deflected by the first deflected light beam plane and the second deflected light beam plane is made identical.

REFERENCES:
patent: 3463882 (1969-08-01), Herbold
patent: 3614312 (1971-10-01), Fournier et al.
patent: 4008958 (1977-02-01), Kingsland

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