Coherence three-dimensional imaging spectrometry based on measurement of rotated-hyperbolic volume interferograms

A new interferometric technique to obtain three-dimensional multispectral images of spatially incoherent polychromatic-source distributions is investigated. This technique is based on the measurement of a new type of volume interferogram, herein called the rotated-hyperbolic volume interferogram, which can be obtained by existing interferometer together with a novel aperture synthesis. This paper reports the first demonstration of the method: measurement of a monochromatic point source. The results obtained from this measurement included three-dimensional spatial information and spectral information corresponding to the impulse response function defined over a four-dimensional space. These experimental results confirmed that the imaging characteristics, particularly depth resolution, of the new method are superior to those of previous methods.