Hold At An Angle - Symbol P470 Manual

Q u i c k
- The red laser turns off.

Hold at an angle

Do not hold the scanner directly perpendicular to the bar code.
Laser light reflecting directly back into the scanner from the bar
code is known as specular reflection. This strong light can
temporarily "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
a successful decode. Simple practice quickly shows what
tolerances to work within.
1. Successful
Scanning
65°
Scan
Beam
R e f e r e n c e
°
forward or backward and achieve
2. Possible Specular
Reflection
Bar Code
Bar Code
3
3. Successful
65°
Shaded area represents
dead zone (+-2°)
Bar Code
Scanning
Scan
Beam