Figure 6:

Multi-aperture divided spectral imaging system. (a) Fourier transform snapshot imaging spectrometer [44], two Nomarski prisms (NP) and a half-wave plate (HWP) between them form a birefringent polarization interferometer (BPI). (b) Schematic of the spatial position of the linear optical path differences (OPD) with relation to each sub-image. (c) Schematic of the ORRIS system [45]. (d) Lenslet arrays are arranged tilted to enable spectral scanning of individual sub-images with linear variable filter (LVF). (a and b) Reproduced with permission [44]. Copyright 2012, Optica Publishing Group. (c and d) Reproduced with permission [45]. Copyright 2019, Optica Publishing Group.