Scanning lens system for a light beam scanning device

Details Scanning lens system for a light beam scanning device Scanning lens system for a light beam scanning device

1988-01-11

1988-11-22

Corbin, John K.

G02B 2710, G02B 306

Patent

active

047861517

ABSTRACT:
A scanning lens system for a light beam scanning device in which a light beam emitted from a light source is shaped by a beam shaping optical element into a linear image to enter a surface of a deflection member and the beam deflected by the deflection member is restored to a circular-like image and projected onto an objective surface by the scanning lens system. The scanning lens system consisting of from the deflection member side a first, second and third single lens, the first single lens being a spherical lens with a positive refractive power, the second single lens being a toric lens with a negative refractive power in a scanning plane and with a positive refractive power in a plane perpendicular to the scanning plane, and the third single lens being a spherical lens with a positive refractive power.

REFERENCES:
patent: 3750189 (1973-07-01), Fleischer
patent: 3946150 (1976-03-01), Grafton
patent: 4123135 (1978-10-01), Rabedeau
patent: 4447112 (1984-05-01), Matsuoka et al.

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