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Compared to displacement sensors based on laser triangulation, chromatic confocal measurement technology offers the advantage that measurements can be made even in small holes.
Nevertheless, there are also limits to chromatic confocal measurement technology when measuring into holes:
If a chromatic confocal sensor is used to measure through a narrow hole, in many cases not all of the light emitted by the sensor reaches the object being measured. As a result, less signal from the measurement object ultimately reaches the sensor.
Depending on the diameter of the hole, distance to the hole, remission and gloss of the measurement object, this can lead to significant limitations in the measurement quality.
Attached you can find some test measurements with different OD7000s measuring through holes to get an impression of the measurement quality to be expected in different scenarios.
