GE XL Vu+ VideoProbe, Operating Manual

Page: 121 / 168

Chapter 6. Measurement
XL Vu+™ VideoProbe® Operating Manual 111
Figure 90: Bad Example
•
Shadow is on right side of screen.
•
Shadow is not quite vertical, and the
surface appears skewed.
Note: Linear measurements can be
taken on a skew surface, but only
if you select the “Skew”
measurement type.
Figure 91: Good Example
•
Shadow is further left.
•
Shadow is vertical, and the surface
does not appear skewed.
•
Shadow is on the same plane as the
item to be measured.
Figure 92: Bad Example
•
From this in-focus distance, there is
little difference between the shadow
positions on the raised and recessed
surfaces, so you are unlikely to get
an accurate depth measurement.
Figure 93: Good Example
•
With the tip closer to the surface,
even though the image becomes
blurry, the break in the shadow is
more significant. Therefore, a more
accurate depth measurement is
achievable.