Using Refraction in Thin Glass Plates for Optical Path Length Modulation in Low Coherence Interferometry

摘要

In this publication we show that it is possible to replace expensive high-precision linear actuators in white-light-interferometers with inexpensive glass plates and a stepper motor. By rotating the glass plate in the reference beam its optical path length can be modulated and the interferogramm recorded as if a reference mirror was moved.