Optical device for reading and decoding bars of different reflectivity arranged in accordance with a barcode and adjoining one another
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 6, 2001
Grant Date -
N/A
app pub date -
May 12, 1999
filing date -
May 13, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully