Objective diaphragm

Details Objective diaphragm Objective diaphragm

1993-12-03

1997-07-15

Sugarman, Scott J.

Optical: systems and elements

Lens

With light limiting or controlling means

G02B 2608

Patent

active

056488777

ABSTRACT:
A diaphragm for an objective for imaging an image original to be scanned line-by-line onto an optical CCD sensor is provided in the optical part of a scanner device for automatic optical character recognition. The diaphragm has a diaphragm aperture expanded in a direction proceeding orthogonally relative to the CCD sensor. The shape of the diaphragm aperture deviates from a circular diaphragm aperture shape.

REFERENCES:
patent: 4637718 (1987-01-01), Kirchner et al.
patent: 5221835 (1993-06-01), Setani
patent: 5225924 (1993-07-01), Ogawa et al.
patent: 5274480 (1993-12-01), Hirai et al.
"Shaped Aperture for Raster Scanner" by Baran, Xerox Disclosure Journal, vol. 8, No. 2, Mar./Apr. 1983, p. 159.

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