Fig. 1. Principle diagram of snapshot Fourier transform imaging spectrometer. (a) Structure; (b) optical path

Fig. 2. Interferogram sequences and recovered spectra corresponding to different focal length standard deviations. (a) Interferogram for σ_f=0 mm; (b) spectrum for σ_f=0 mm; (c) interferogram for σ_f=2 mm; (d) spectrum for σ_f=2 mm

Fig. 3. Interval frequency count distribution of relative spectrum error

Fig. 4. Relationship of relative spectrum error with focal length standard deviation

Fig. 5. Recovered spectra corresponding to different step length standard deviations. (a) Zero step error; (b) single transverse step error; (c) single longitudinal step error; (d) total step error

Fig. 6. Interval frequency count distributions of relative spectrum error. (a) Single transverse step error; (b) single longitudinal step error; (c) total step error

Fig. 7. Relationship of relative spectrum error with step length standard deviation

Fig. 8. Relative spectrum error versus step length standard deviation after phase compensation correction