Development of an autofocus system for lateral scanning white light interferometry
|Group size:||3-3 persons|
The small axial measuring range (approx. 8 µm) of the white light interferometer means that the interference fringes move out of the camera's field of view even with slight deviations of the scan path.
This makes it difficult to take longer scans ( > 5 mm), especially on rotating surfaces. In practice, deviations from the ideal scan path due to eccentric rotation or shape deviation, for example, can never be completely avoided.
In order to prepare the measuring system for the long-term planned in-process use, an autofocus is to be developed.