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. 06, 2001
Filed:
May. 12, 1999
Gerrit Boersma, Odijk, NL;
Scantech B.V., Amersfoort, NL;
Abstract
Optical device for reading and decoding bars of different reflectivity arranged in accordance with a barcode and adjoining one another, comprising an optical scanning device for scanning the bars by means of a light beam, a sensor for receiving the reflected light beam and the conversion thereof into an electrical sensor output signal, a transition detector for detecting the level transitions in the sensor output signal and a decoding device which decodes the scanned barcode on the basis of the output signals from the transition detector. The transition detector is provided with a comparator and a flipflop connected to the output thereof. The sensor output signal is fed to one of the inputs of the comparator. The output of the flipflop is coupled via at least a number of first integrators to the other input of the comparator. The transition detector also comprises one or more second integrators connected to the output of the flipflop and a device, connected to said second integrators, for determining the positions of the transitions in the barcode.