Hold At An Angle - Symbol LS 1000 Reference Manual

LS 1000 Product Reference Guide: Chapter 2, Scanning

Hold at an Angle

Do not hold the scanner directly over the bar code. Laser light reflecting directly back
into the scanner from the bar code is known as specular reflection. This strong light can
"blind" the scanner and make decoding difficult. The area where specular reflection
occurs is known as a "dead zone".
You can tilt the scanner up to 65° forward or back and achieve a successful decode.
Simple practice quickly shows what tolerances to work within.
1. Successful Scanning.
65
2. Possible Specular Reflection.
Scan
Beam
Bar Code
Shaded area represents
dead zone ( 2 )
Bar Code
2-4
3. Successful Scanning.
65
Scan
Beam
Bar Code