A method for recording and reconstructing spectral and spatial intensity distributions of sources is described. Three-dimensional information (two for spatial and one for wavelength) of the sources is simultaneously recorded as their projected forms by an imaging system including a crossed phase grating. A modified multiplicative algebraic technique is developed to reconstruct the original distribution. In experiments we obtained nine projection patterns with equal brightness of a color slide illuminated by a tungsten lamp. The reconstructed distribution shows good agreement with that measured by interference filters.
Takayuki Okamoto, Akinori Takahashi, and Ichirou Yamaguchi, "Simultaneous Acquisition of Spectral and Spatial Intensity Distribution," Appl. Spectrosc. 47, 1198-1202 (1993)