This is the second video on optical interferometry, which is dedicated to measuring the wavefront shapes of a mirror, 2 lens assemblies and 3 microscope objectives.

Contents:
00:00 Intro
02:04 Video camera upgrade
04:23 DFT-fringe software
06:57 Transmission Sphere reference calibration
12:29 Shape of a Zerodur Perkin Elmer wafer stepper mirror
14:55 Wavefront deformation of a Canon FD f/1.2 camera lens (1980)
18:10 Wavefront test of a modern Canon EF 24-105mm f/4 zoom lens
19:19 Microscope objective testing
22:44 Nikon Plan Fluor 10x / 0.30
23:17 Leica Fluotar 20x / 0.50
25:23 Nikon Plan APO 20x / 0.75

Link to Optical Interferometry Part 1:
   • Optical Interferometry Part 1: Introd...  

Link to the video on measuring MTF:
   • Mirror Lenses Part 2: Testing the Mod...  

DFTfringe forum page:
https://groups.io/g/Interferometry/to...

DFT fringe download:
https://github.com/githubdoe/DFTFring...

Dale Eason on YouTube:
   / @daleeason9687  

lens config Canon F1.2 By Jake Low - Own work, CC BY-SA 4.0 (modified) https://commons.wikimedia.org/w/index...
Laser diffraction pattern By Wisky - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index...

Do you need to be referenced but I forgot to do that? Let me know and I will set it straight.