Optical device for reading and decoding a barcode
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 20, 2001
Grant Date -
N/A
app pub date -
Feb 10, 1999
filing date -
Feb 10, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An optional device for reading and decoding bars of different reflectivity arranged in accordance with a barcode and adjoining one another. The device includes an optical scanning device for scanning the bars by a light beam, a sensor for receiving the reflected light beam and converting the latter into an electrical sensor output signal, a transition detector for detecting the level transitions of the electrical sensor output signal and a decoding device which decodes the scanned barcode on the basis of the output signals from the transition detector. The sensor output signal is fed to an amplitude averaging device and/or contrast averaging device, the output of which is connected to a decision device which controls the decoding device in such a way that reading and decoding of the barcode is carried out several times if the output signal from the amplitude averaging device and/or contrast averaging device is below at least a predetermined threshold value.
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