# Refocussing Young's double slits

1. Apr 10, 2008

### 2diabolos

In the Young's double slit experiment, we have interferences stripes in the infinite space (ie in the focal plane of the fisrt lens we put after the slits.

I now put a second lens after this "pupill plan" (after the focal plan of the 1 lens).
I should produce the image of the 2 slits in the focal plan of the 2nd lens.

My question is this one : what is the angular distribution of light for each of the imaged slit ?
gaussian or "with stripes" ?