Metrologic Instruments MS863 manual Depth Of Field, Depth of Field

DEPTH OF FIELD

Through the glass at the front of the scanner, safe, low powered laser beams are projected in a complex pattern that resembles a spider web. Each of the five scan fields that generate the scan pattern extend to a range of 127mm (5.0"). This range begins from the face of the scanner window and extends from the unit for a distance of 127mm (5.0") measured along the scanning beam at the center of each scan segment. This 0.0mm - 127mm (0" - 5") range is the depth of field for the MS860i scanner (see figure 6).

The scan pattern is projected at an angle away from the touch plate (approximately 20 degrees, overall). As the scan fields move outward, they expand. Like an image expands from a film projector as it moves toward the screen at a movie theater, the scan pattern projects out to a well-defined region. Any label that is facing toward the scanner can be read at any point within the scanning field.

Figure 6: Depth of Field

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