Metrologic Instruments TECH 7 - Manual (Page 17)

Depth of Scan Field for the MS775 Scanner
The depth of field for the scanner is 76mm to 254mm (3.00” - 10.00”)
from the laser output window. Pass the symbol through the scan area
in order for the scanner to recognize the bar code. (Refer to Figure 8)
Figure 8: MS775 Scanner, Front View
13
229 mm [9.00 in]
254 mm [10.00 in]
76 mm [3.00 in]