How Does QPSI Technology Perform Against Vibration?

Vibrations can present considerable challenges during phase-shifting laser interferometer measurements. Today, state-of-the-art interferometers can measure with nanometer-levels of precision. In return, they can be susceptible to errors if used in loud and highly dynamic manufacturing environments where significant vibration is present. 

Why Vibration Matters
Measurements taken in vibration-prone environments typically encounter fringe print-through errors — resulting in bad data or a signal that is impossible to acquire. There are solutions that attempt to correct a poor environment in order to mitigate its impact undesirable effects — and for instance, sometimes facilities are completely renovated in order to establish a “metrology” grade environment. Another method to overcome the negative effects is to take many repeated measurements over time and average them. This method has limited effectiveness and can take a long time.

QPSI Technology Enables Reliable Data in Harsh Environments
High-powered laser sources can be a part of an anti-vibration solution as they provide enough power to shutter the camera faster as there is more light. This means faster data acquisition and less sensitivity to vibration because the measurement takes less time.