  We show that Fourier-plane imaging in conjunction with the
Kretschmann-Raether configuration can be used for measuring polariton
dispersion with spatial discrimination of the sample, over the whole visible
spectral range. We demonstrate the functionality of our design on several
architectures, including plasmonic waveguides, and show that our new design
enables the measurement of plasmonic dispersion curves of
spatially-inhomogeneous structures with features as small as 3{\mu}m, in a
single shot.
