General Information on Interferometry
Laser Interferometers measure distance with extreme accuracy. 1nm is possible.
This resolution and accuracy makes Laser Interferometers effectively the best way to measure distances accurately (< 0,1mm) in most machine engineering applications.
Thanks to the extreme accuracy in distance measurements, together with one or two optical accessories Interferometers can also be used to measure other things apart from distance. For example:
- Straightness Measurement
- Combined straightness and displacement measurement
- Straightness measurement via Auto collimation.
- Flatness via auto collimation.
The above listed tasks can be completed easier and quicker with other methods and instruments. However, when measuring distances the Interferometer is the absolute Nr 1.