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:
Sep. 02, 1980
Filed:
Jul. 08, 1977
Richard W Rhyins, Ridgefield, CT (US);
Antoon M Hurkmans, Bethlehem, CT (US);
Burroughs Corporation, Detroit, MI (US);
Abstract
The disclosure is of apparatus including a duct-like light guide having an inlet end and an outlet end, light source means at the inlet end, a document at the outlet end, an optical reading system for receiving light reflected from the document, and electronic circuit means for converting the reflected light to electrical signals. Typically, the optical reading system has non-uniform light transmission characteristics, and, with one type of lens system, there is fall-off in intensity at the ends of the system. To compensate for this fall-off, the light source means is designed and positioned to provide a corresponding non-uniform light distribution so that the net effect is a uniform light distribution at the output of the lens system.