Incremental printing of symbolic information – Ink jet – Controller
Patent
1997-10-06
1999-01-05
Burr, Edgar
Incremental printing of symbolic information
Ink jet
Controller
250216, 250234, B41J 29393
Patent
active
058568336
ABSTRACT:
An optical sensor module for identifying characteristics of printed ink jet images on printing media residing in a media plane. The module has a chassis and a connected illumination source and detector spaced apart from the media plane. An integral optical element is positioned between the image plane and the illumination source and detector. The optical element has a first portion having a first optical characteristic positioned on a first optical path between the illumination source and a selected region of the media plane, and a second portion having a second optical characteristic different from the first optical characteristic and positioned on a second optical path between the illumination source and the selected region. The optical element may include diffractive optics, fresnel lenses, and conventional lenses formed of transparent plastics to steer, focus and diffuse light onto the selected region and return it efficiently to the detector.
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Elgee Steven B.
Lytle John D.
Burr Edgar
Ghatt Dave A.
Hewlett--Packard Company
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