The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 10, 1979
Filed:
Oct. 11, 1977
Steven Kos, Ottawa, CA;
David R Baraff, Ottawa, CA;
Northern Telecom Limited, Montreal, CA;
Abstract
Instead of imaging a line across a document by a lens system on to an imager, direct imaging is obtained by positioning the document in close proximity to but spaced a predetermined distance from a linear array of photo-detectors and illuminating the document by light from beneath the detectors, the light passing through spaces between detectors and being reflected back to the detectors. To prevent saturation of the dectectors by light direct from the illuminating means, opaque material is positioned beneath the detectors with gaps or apertures through which light can illuminate the document. The detectors can be spaced close together to give desired resolution, or spaced a predetermined distance apart and the detector head stepped laterally. More than one line of detectors can be provided.