Facet tracking correction system for laser scanners

Details Facet tracking correction system for laser scanners Facet tracking correction system for laser scanners

1996-06-28

1998-06-02

Dzierzynski, Paul M.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359205, 359207, 347260, G02B 2608

Patent

active

057609438

ABSTRACT:
An optical system for a beam scanning apparatus comprises a laser beam, a cylindrical first lens, a scanning mirror rotatable about an axis for deflecting and scanning the focused energy beam and a concave, toroidal mirror adapted to deflect the focused energy beam from the rotating mirror and collimate the beam. The toroidal mirror has a radius in a major axis equal to the focal length of the first lens and a radius in a minor axis equal to twice the focal length of the first lens, and is spaced from the first mirror a distance equal to the focal length of the first lens. Preferrably, the axis of rotation of the scanning mirror is non-orthogonal with respect to the direction of the beam from the first lens.

REFERENCES:
patent: 3750189 (1973-07-01), Fleischer
patent: 4123135 (1978-10-01), Rabedeau
patent: 5168386 (1992-12-01), Galbraith
patent: 5666220 (1997-09-01), Sakuma

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