Manual No. 25-NLB0045-01
Series NLB-9625/9645 Mini Laser Fixed Position Scanner
Page 7
Section 3
Positioning the Scanner
Getting Optimum Performance
Three items greatly impact scanner performance:
1) Distance from the scan window to the bar code
2) Specular Reflection
3) Quality of bar code labels
1) Distance to the Bar Code
The operation of the scanner is similar to a camera. If you photograph an object that is out of focus, the
resulting picture will be blurry. The same is true with the scanner. If the bar code label is out of focus, the
scanner may have difficulty decoding what appears to be fuzzy bars and spaces.
Focal Distance
Ideally, the distance from the window of the scanner to the bar code label should be equal to the focal
distance of the scanner. For the NLB-9625/9645 Series fixed position laser scanners, the nominal focal
distances are:
9626 Side View3.5 in (88.9 mm)
9627 Front View5.6 in (142.3 mm)
9646 Side View
4.2 in (107 mm)
9647 Front View 5.2 in (132 mm)
