Optische 3D-Messtechnik: Inlinemessung einer Verzahnungsgeometrie
© Fraunhofer IPM
Messung eines Zahnrads mithilfe eines Lichtsignals als Beispiel der optischen 3D-Messtechnik

Optical 3D measurement#

Applications and methods of optical 3D measurement

Measuring and testing with optical 3D measurement

What is optical 3D measurement?#

Optical 3D measurement is used to check that the geometric dimensions (dimension, shape and position) of components are correct  and, meanwhile,  in many cases it can replace the tactile measurements with mechanical gauges or coordinate measuring machines. Tactile measurements are very time-consuming; with non-contact optical 3D measurement technology on the other hand, measurements are  10 to 1000 times faster and can also be easily automated. In suitable cases, zero-defect concepts thus can be implemented in the production cycle.

Procedure of optical 3D measurement

Optical 3D measuring methods are widely used nowadays. Depending on the application,technologies  such as pattern and fringe projection, light-sectioning, photogrammetry, light travel time, white-light interferometry, confocal measurement techniques, focus variation, etc. are used. The range of 3D applications is extended by procedures such as X-ray computed tomography, with which highly accurate measuring of structures inside an object made out of nearly every material becomes possible

How does optical 3D  measurement work?

Optical sensor systems for 3D measuring procedures usually consist of a light source (transmitter), which applies a special, a priori known light signal to the test object, and a receiving unit (receiver) which records the light signal. The object changes the amplitude, phase, polarization or direction of the optical signal in a known manner which  is used as a measured variable. By evaluating this change, the 3D information or surface structure of the object can be deduced, depending on the measuring principle.

Application areas of optical 3D metrology#

Optical 3D measurement in the webshop

In our webshop you will find events, publications, brochures and leaflets about 3D measurement.

Fields of application

  • Quality assurance in industrial manufacturing processes
  • Process control through direct feedback of the measurement results into the process
  • Presence and completeness check
  • Position and location recognition
  • Production measurement technology
  • Inline measurement Technology
  • Quality check
  • Medical technology
  • Development and design
  • Reverse engineering
  • Microstructure, surface

Industrial production

  • Automotive and supplier industry
  • Aviation
  • Casting
  • Plastics
  • Mechanical Engineering
  • Tool and mould making
  • Glass and ceramics
  • Medical technology
  • Rapid prototyping
  • Criminalistics (forensics)
  • Archaeology