Thickness of Plexiglass Posted in: Thickness Measurement
Last Updated: March 20, 2023
Confocal Sensors Measure the Thickness of Plexiglass
Confocal Displacement Sensors Are Used to Measure Translucent Materials
The thickness measurement of plexiglass sheet is a very common application for confocal displacement sensors. These products are often extruded between two polished rollers to squeeze the material into the desired thickness. This thickness must be measured and verified for in-process quality control.
While any laser displacement sensor might measure to opaque polymer sheets, it is the translucent or transparent materials that require confocal sensors. While others claim that plexiglass thickness can be done accurately with blue laser triangulation sensor, the confocal white light displacement sensor are the most reliable form of measurement for this material. One or two measurement probes are aimed perpendicularly to the plexiglass sheet and the material must be stabilized during measurement, so its vibration amplitude does not exceed the span of the sensor system.
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