Flat bed optical scanning beam deflection system
AssigneeAllied Corporation
InventorMichael Plaot
Life of this patent
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Abstract
An optical flat bed deflection system comprises at least one rotating active reflective face (6) for deflecting a beam of parallel rays (1) along a deflection or scan line in a planar deflection plane (15), and an imaging optical system, i.e., an f.theta. lens arrangement, interposed between the active reflective face and the deflection plane. In order to reduce the disturbing influence of the bearing wobbling during rotation, on the image, a reverse-telescope like optical system is provided in front of the imaging optical system for enlarging one exit angle of the active reflective faces. In connection therewith, only two rotating active reflective faces are provided, each one of which is provided as a prism.
Claims15
In an optical laser beam deflection system of the type including rotating active reflective faces for generating a light scan, in combination with an imaging system for imaging, the improvement comprising optical means (2-8) provided in the light path before the imaging system (18) for enlarging the entrance angle (C) of the imaging system, and wherein not more than two rotating reflective bodies (4.5) are provided which are arranged in a pentaprism structure, each with one active reflective face, to thereby obviate effects of tilting relative to inclinations of the axis of rotation (20) during rotation thereof, and said bodies being positioned in the light path before said optical means.
Dependencies are inferred from the claim text.