Laser bar code reader measuring phase of the pulse laser to determine the distance
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United States of America Patent
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Jan 9, 1996
Grant Date -
N/A
app pub date -
Oct 24, 1994
filing date -
Nov 4, 1993
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A laser bar code scanner is disclosed using a pulse laser and phase detector for returned light to determine the distance of a bar code. Also, disclosed the use of several lasers having different focal distances with the determined distance being used to select appropriate laser to increase the working distance of the scanner.
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