  In an analysis of the Afshar experiment R.E. Kastner points out that the
selection system used in this experiment randomly separates the photons that go
to the detectors, and therefore no which-way information is obtained. In this
paper we present a modified but equivalent version of the Afshar experiment
that does not contain a selection device. The double-slit is replaced by two
separate coherent laser beams that overlap under a small angle. At the
intersection of the beams an interference pattern can be inferred in a
non-perturbative manner, which confirms the existence of a superposition state.
In the far field the beams separate without the use of a lens system. Momentum
conservation warranties that which-way information is preserved. We also
propose an alternative sequence of Stern-Gerlach devices that represents a
close analogue to the Afshar experimental set up.
