Creating 3D-maps of reflective surfaces using White Light Interferometry (WLI, also known as Coherence Scanning interferometry).

Content:
0:00 Intro
1:43 Building a White Light Interferometer
4:39 About spatial coherence
7:11 Observing interference in white light
10:37 Broad-band radiation interference explained in detail
21:11 WLI Microscope Zygo Newview 100 explored
23:16 Measurement examples
25:44 Michelson and Mireau objectives
26:56 Concave spherical mirror surface (measurement)
27:44 Granite surface structure (measurement)
28:47 Etched glass surface (measurement)
29:32 Turned stainless vacuum part surface roughness (measurement)

The simulations starting from 5:12 have been made using the python script produced by @DiffractionLimited. This code can be downloaded from https://github.com/0x23/WaveSimulator2D