white light interferometry

State and prospects of computerized systems monitoring the topology of surfaces, based on white light interferomertry

This paper describes a computerized system for object topology control based on a white light interferometer. The theoretical fundamentals of white light interferometry and mathematical model of an inter­ferogram are presented. An overview and comparative analysis of methods for the reconstruction of the topology of surfaces based on a white light interferogram are performed, their main advantages and disadvantages are defined, and the objectives for the development of computerized systems are formulated.

Method of surface reconstruction from white light interferogram based on hilbert transrorm

In this paper theoretical fundamentals of white light interferometry and mathematical model of interferogramm were analyzed. The method of topography reconstruction from phase of white-light interferogramm based on amplitude demodulation using Hilbert transform was developed. The verification of introduced algorithm on tilted and sphere surface is presented and the main sources of reconstruction errors were analyzed.