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1-3
Introduction
Figure 1-1. LS 1220
Theory of Operation
A laser diode produces a single beam of coherent light which is deflected off of an
oscillating mirror to create the laser scan beam.
When the laser light strikes a bar code, the dark bars absorb the laser light and the light
spaces reflects it. A photo diode senses the reflected light and generates a proportional
current. That current is amplified and filtered to produce an analog voltage which is sent to
a digitizer. The digitizer transforms the signal into a digital representation of the bar code
called the Digitized Bar Pattern (DBP) and the DBP data is sent to the host or decode board
for processing.
Summary of Contents for LS 1220
Page 2: ...LS 1220 Product Reference Guide ...
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Page 4: ...LS 1220 Product Reference Guide 70 12072 03 Revision A January 2003 ...
Page 23: ...1 8 LS 1220 Product Reference Guide Figure 1 3 LS 1220 Connector ...
Page 33: ...2 10 LS 1220 Product Reference Guide ...
Page 71: ...8 14 LS 1220 Product Reference Guide Figure 8 1 Hardware Handshaking ...
Page 97: ...9 6 LS 1220 Product Reference Guide Code Lengths cont d 1 2 3 4 5 6 7 8 9 0 CANCEL ...
Page 105: ...9 14 LS 1220 Product Reference Guide Prefix Suffix Values cont d 1 2 3 4 5 6 7 8 9 0 CANCEL ...
Page 108: ...9 17 Parameter Menus UPC Security Zone cont d 1 2 3 4 5 6 7 8 9 0 CANCEL ...
Page 120: ...9 29 Parameter Menus Intercharacter Delay cont d 1 2 3 4 5 6 7 8 9 0 CANCEL ...
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