PX-36
V-1.0
18
7.4.4 Printed Contrast Signal (PCS)
0.2 or higher
<Conditions>
MRD
12% and higher (70% or higher reflectivity of space and quiet zone)
Distance
105 mm from the front edge of the scanner
Bar code
UPC (resolution 0.33 mm, PCS 0.2) specified in Section 8.1.
MRD = Minimum reflectance of white space - Maximum reflectance of black bar
𝑃𝐶𝑆
=
𝑅𝑒𝑓𝑙𝑒𝑐𝑡𝑎𝑛𝑐𝑒
𝑜𝑓
𝑤ℎ𝑖𝑡𝑒
𝑠𝑝𝑎𝑐𝑒 − 𝑅𝑒𝑓𝑙𝑒𝑐𝑡𝑎𝑛𝑐𝑒
𝑜𝑓
𝑏𝑙𝑎𝑐𝑘
𝑏𝑎𝑟
𝑅𝑒𝑓𝑒𝑐𝑡𝑎𝑛𝑐𝑒
𝑜𝑓
𝑤ℎ𝑖𝑡𝑒
𝑠𝑝𝑎𝑐𝑒
* Be sure to keep the optical window clean without dirt or scratches or it may have a bad effect on the reading
characteristics.
7.4.5 Minimum Resolution
1D bar code
0.1 mm (Code 39 specified in Section 7.4.2)
GS1 Databar
0.169 mm (GS1 Databar Limited specified in Section 7.4.2)
Stacked code
0.169 mm (PDF417, GS1 Databar Limited Composite specified in Section 7.4.2)
2D code
0.169 mm (QR Code specified in Section 7.4.2)
0.212 mm (Data Matrix specified in Section 7.4.2)
<Conditions>
Bar code
Above codes specified in Section 7.4.2
Distance
75 mm from the front edge of the scanner
Angle
α = 0°, β = + 15°, γ = 0°
Curvature
R = ∞
7.4.6 Max. Width Barcode
Code 39 with width of 100 mm and resolution of 0.2 mm can be read
<Conditions>
Bar Code
Code 39 (resolution 0.20 mm, PCS 0.9) specified in Section 7.4.2
Distance
135 mm from the front edge of the scanner
Angle
α = 0°, β = +15°, γ = 0°
Curvature
R = ∞
Figure 6: Barcode width