Contact(less) dimensional measurement
The Metrology laboratory has different instrumentation that are used for contact(less) dimensional measurements.
These instruments differ in measurement method, range and accuracy. Some of the measurement methods are contactless. Their main properties are listed in the table below.
CMM
Coordinate measurement machine
The CMM is a coordinate measurement machine, which can measure 3D coordinates within the machine volume by probing the test item at different areas of interest. The low force contact triggers the recording of the 3D location of the contact point with the test item at micrometer level. For contactless measurements, the force probe can be exchanged with a vision probe for measuring visual targets and with a laser scanner head for measuring dense point clouds on the surfaces of the test item.
Laser Tracker
Portable coordinate measurement device
The Laser Tracker is a portable coordinate measurement device, which can measure 3D coordinates by handheld probing on the test item at different areas of interest. The probing is done by a spherical corner cube reflectors or with a T-probe. The instrument measures two angles (zenith and azimuth) by its angular encoders and one absolute distance by its laser interferometer and/or absolute distometer. These measurements form a set of spherical coordinates that can be calculated and presented into Cartesian 3D coordinates. The instrument can be moved around the test object, which makes the measurement range flexible. The instrument has the capability to measure contactless with the use of a handheld laser scanner (T-scan).
Theodolites
Theodolites
Furthermore, the Metrology laboratory is equipped with Theodolites, Roundness tester, Roughness tester and a large number of classical measuring tools (i.e. micrometers and callipers) for performing dimensional measurements.