Fig. 1. Experimental setup for spatial heterodyne Fourier transform spectrometer using Michelson interferometer structure

Fig. 2. Fourier transform spectrometer experiment. (a) Pattern image of incident beam with single wavelength of 501 nm; (b) pattern image of incident beam with single wavelength of 600 nm; (c) normalized interference signals of incident beams with single wavelengths of 501 nm (solid line) and 600 nm (dash line); (d) normalized spectra of incident lights with single wavelengths of 501 nm (solid line) and 600 nm (dash line) calculated by Fourier transform method

Fig. 3. Heat map of transpose of calibration matrix

Fig. 4. Comparative experiment between reconstructed spectra and spectra calculated by Fourier transform method. (a) Reconstructed spectra of 100 incident lights with single wavelengths of 520.1~530.0 nm in ideal situation; (b) spectra of 100 incident lights with single wavelengths of 520.1~530.0 nm calculated by Fourier transform method

Fig. 5. Normalized reconstructed spectral signal of incident beam with single wavelength of 525.0 nm (solid line), normalized reconstructed spectral signal in ideal situation (dash line), and normalized spectral signal calculated by Fourier transform method (dotted line) of spectral reconstruction test experiment