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07/30/2014
Measurement Types
The Visual iQ system supports three types of measurement: 3D Phase, stereo,
and comparison.
Type
Advantages
Disadvantages
3D Phase
Over stereo or comparison measurements:
• Optical tip used to view and measure.
• Automatic tip to target range-finding
indicator.
• Full screen view.
• More accurate depth measurements.
• Cross-section profile view and measure
• Increased measurement distances are
possible
• The surface need not be perpendicular
to the tip.
• 3D point cloud view
• The system cannot measure moving
parts.
• Must measure highly reflective
surfaces at an angle.
Stereo
Over comparison measurements:
• More accurate.
• No known reference is needed.
• Can measure depth.
• The surface does not need to be
perpendicular to the probe view.
The system may be unable to position the
matching cursors accurately with any of
these conditions in the measurement area:
insufficient detail, repeating patterns, glare,
or smooth, straight lines to measure along.
In some cases, you can eliminate the
problem by repositioning the probe tip
and adjusting the brightness.
Comparison
Over stereo measurements:
• Use the probe headguard or any other
tip optic.
• Measure with probe tip farther away.
• Measure large objects.
• Check approximate size of many items
quickly.
• Less accurate than stereo
measurements.
• Known references may not be present
and may be difficult to deliver to the
measurement site.
• Measurement surface must be nearly
perpendicular to the probe view for an
accurate measurement.
Note:
3DPM tips are automatically identified by the system. Stereo tips must be
manually selected each time a stereo measurement is performed.
Unlike standard optical tips, 3D PhaseProbe®
(
1
)
and
StereoProbe® (
2
) measurement
tips are factory-calibrated for use with specific probes and will not measure
accurately with other probes. These tips are matched to probes by the serial
numbers (
3
) identified on each optical tip and each probe label (
4
). Calibration data is
stored in memory in the probe.
Notes:
-To ensure measurement accuracy, verify the tip’s accuracy each time it is installed.
Refer to
for verification procedures.
-The installed tip must be identified before making Stereo measurements
.
Click here to
view stereo tip management
OR
Click here to work with 3DPM tips.
To ensure that no mechanical damage has degraded their accuracy, verify
measurement tips each time you use them. See
Verifying Measurement Tips
in
To learn which tips are available for each measurement technique, see
the
Optical Tip Table
