Motorola LS3578 - Manual (Page 34)

2 - 6 Symbol LS3578 Product Reference Guide
Aiming
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 which can make decoding difficult.
Tilt the scanner up to 65° forward or back to achieve a successful decode. Simple practice shows what tolerances
to work within.
Figure 2-2 Optimum Scan Angles
65°
65°