Hello Dave and Vladimir,
This http://rohr.aiax.de/@PSI-VT25.avi file shows my idea of the
phase shifting with the Bath-interferometer. (Size about 5,3 MB)
The fringes moving are caused by pressing the table a slight amount
or if I move myself on the ground. In this matter you get a lot of
different fringes map for calculation. You vary the z-axis. I used
the TouCam/Phillips with a 15 mm Objektiv and a 250/2300 Sphere
and 320x240 dots, 5 fotos/sek and timelimit 2 seconds. I didn't know,
how to make the file smaller. I used the JPG mode.
[Blockierte Grafik: http://rohr.aiax.de/@PSI-VT25.jpg]
let's understand what happens with the fringes map, if you reduce the tilt and if you try to
get just one black or white "fringe" on your "fringes map" .
It looks like a Foucault with the interferometer. I used a sphere, but if you use a parabola
in RoC, the surface difference is more than one Lambda, Are you sure, you will get fotos
http://rohr.aiax.de/@PSI-seeing-VT27.avi ... 2 MB
http://rohr.aiax.de/@PSI-seeing-VT30.avi ... 2 MB
The next file shows the "seeing" with my Bath-interferometer.
http://rohr.aiax.de/@PSI-seeing-VT33.avi ... 2 MB