  Correlation plenoptic imaging (CPI) is a light-field imaging technique
employing intensity correlation measurements to simultaneously detect the
spatial distribution and the propagation direction of light. Compared to
standard methods, in which light-field images are directly encoded in
intensity, CPI provides a significant enhancement of the volumetric
reconstruction performance in terms of both achievable depth of field and 3D
resolution. In this article, we present a novel CPI configuration where
light-field information is encoded in correlations between position and
momentum measurements, namely, points on a given object plane and points of the
Fourier plane of the imaging lens. Besides the fundamental interest in
retrieving the properties of position-momentum correlation, the proposed scheme
overcomes practical limitations of previously proposed setups, providing higher
axial homogeneity and robustness with respect to the identification of
reference planes.
