Check out my video on the immersion null. This test uses a pan of water, a fiber optic and a green laser and just needs a vertical test space.
I have moved files and pictures to my web page. Some files did not transfer to WordPress, many like OSLO file could be put in Word and hopefully can be transferred back. I had to skip some file that were similar or that I think were not something ATMs would ever make. If anyone thinks there’s something I should have included or have any new material or pictures just email me at my email@example.com address.