Optical scanner with anamorphic optical system

Details Optical scanner with anamorphic optical system Optical scanner with anamorphic optical system

1978-12-15

1981-10-13

Henry, Jon W.

G02B 2717

Patent

active

042945062

ABSTRACT:
An optical scanner includes a multi-faceted rotating mirror which reflects light beam from a laser unit, and a condenser lens which focuses the beam as a scanning spot on a scanning surface. An anamorphic optical system comprising a cylindrical lens is disposed between the mirror and the surface, and focuses the beam on the surface in the scan direction, but focuses the beam on a plane short of the scanning surface in a direction perpendicular to the scan direction. An optical element having a magnification of projection which is equal to or less than unity and having a refracting or focussing force only in a direction perpendicular to the scan direction is disposed between the plane and the scanning surface.

REFERENCES:
patent: 3750189 (1973-07-01), Fleischer
patent: 3865465 (1975-02-01), Tatuoka et al.
patent: 4121883 (1978-10-01), Goshima et al.

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