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:
Mar. 19, 2002
Filed:
Jun. 03, 1999
Brian M. Kelly, Eugene, OR (US);
Brian B. Wood, Creswell, OR (US);
Bruce W. Dozier, Eugene, OR (US);
David P. Ingles, Eugene, OR (US);
PSC Scanning, Inc., Eugene, OR (US);
Abstract
A method and apparatus for detecting an object within the field of view of an optical reader, such as bar code scanner. Object detection is determined by a software algorithm that may be embedded in a controller or microprocessor contained within the scanner. The object detection software algorithm uses a current trigger threshold to determine whether there is a change in the amount of reflected light energy sufficient to indicate the presence of motion in the scanner field of view. The system may normalize random noise within a scanner's circuitry and accommodate varying degrees of reflectivity of target materials, without requiring additional circuitry or reflective tape to accurately detect an object.