I have been using Michelson Interferometry to characterise the surface flatness of my glass cell. In the reference arm of my interferometer, I am using a mirror of surface flatness lambda/10. The wavelength I am using in this measurement is centered around 630nm.
One of fringe patterns I captured is shown in the imaged attached to this question.
I wish to reconstruct the surface of the glass cell through the interference fringes. Are there any existing computational techniques/opensource code to do so?
Finite difference time domain (FDTD) is an efficient method for simulation of wave propagation and interference. The source code for it can be obtained in sullivan's book.
I have a simple package called Fran which you can use. It is old (Best paper mech end 1986!) but has a good phase unwrapper. However it has a problem with large images. (more than 2,000x2,000 pixels). Alternatively recently I completed a contract for MIT (best ASME paper 2018) using software from LuigiChen called UU. or as it now is MU3. The interferometric images were 4,000x5,000 and it worked great. It solved the problems and unwrapped them without problem.
Please contact if you want further details. Let me know if you want further details
Thank you all for your replies, Peter Bryanston-cross I would be most delighted to be able to use both Fran and MU3/UU. My images are 1262 x 964, so I think this will not be a problem.
- Badges
- Science topic
- Similar topics
- Physical Sciences
- Materials Science
- Materials
- Inorganic Materials
- Ceramics
- Glass