P a g e |
42
horizontal scan lines may appear curved along the face, bowing down in the region closer to the instrument. This is
because the vertical angle of the laser remains fixed during each scan line: at shorter distances it will hit a lower
point on the face than at longer distances, as in the picture below. The result is that upper, central portions of the
face may not be covered by the scan.
It is therefore advisable to use multiple points around the face in order to ensure that all required aspects of
a scene are included in the scan.
The Quarryman Pro will then construct a ‘best-fit’ rectangle around the defined polygon.
Activate a circular scan by selecting two points, one defining the upper boundary of the circular scan, the other
defining the lower boundary. These two points should be separated by less than 4° in the horizontal axis, otherwise
Figure 43 'Curved' horizontal scan lines
Figure 44 Using multiple points to define a scan window
