  Light's polarisation contains information about its source and interactions,
from distant stars to biological samples. Polarimeters can recover this
information, but reliance on birefringent or rotating optical elements limits
their wavelength range and stability. Here we present a static, single-shot
polarimeter based on a Fresnel cone - the direct spatial analogue to the
popular rotating quarter-wave plate approach. We measure the average angular
accuracy to be 2.9 (3.6) degrees for elliptical(linear) polarisation states
across the visible spectrum, with the degree of polarisation determined to
within 0.12(0.08). Our broadband full Stokes polarimeter is robust,
cost-effective, and could find applications in hyper-spectral polarimetry and
scanning microscopy.
