myphotonics

It sounds really interesting. Can you send it to our mail-adress? info@myphotonics.euBest regardsFelix

Yes you are right: From the lens to the screen you overlay two divergent beams with the same distance to the focus. So the spherical wavefronts have the same radius. I meant that you overlay two planar waves in the beamsplitter, as you have already sketched in your draft. I can't open your (probably animated) gifs. I just saw the same picture two times.

Hey Jon, to create lines you need just one lens for increasing the pattern. You can see it in the adjustment Video at 1:25min. In this case you overlay two plane waves. A laterally displacement of the beams create the lines. The larger the shift the thinner the lines are. A axially displacement of the mirror has no effect. In the two-lens setup you generate one spherical wave and overlay it with a plane wave. The optical path differences become larger moving outwardly, so the rings grow up.An axially displacement of the lens manipulate the divergence of the partial beam. It is similar in the one-lens setup with rings: Here you overlay two divergent beams with different divergences. Because of this difference you get higher optical path differences moving outwardly in the pattern, so the r…

Hey Jon, to create lines you need just one lens for increasing the pattern. You can see it in the adjustment Video at 1:25min. In this case you overlay two plane waves. A laterally displacement of the beams create the lines. The larger the shift the thinner the lines are. A axially displacement of the mirror has no effect. In the two-lens setup you generate one spherical wave and overlay it with a plane wave. The optical path differences become larger moving outwardly, so the rings grow up.An axially displacement of the lens manipulate the divergence of the partial beam. It is similar in the one-lens setup with rings: Here you overlay two divergent beams with different divergences. Because of this difference you get higher optical path differences moving outwardly in the pattern, so the rings grow up. You can see it in the figure. With the distance from mirror to beam splitter you manipulate the divergence of each partial beam. With different distances you get different divergences so that you get rings. The red patterns shows this effect. The higher the distance the bigger the number of rings. Best regardsFelix