Fig. 2
Technical evaluation of the DMD-based hyperspectral imaging system. (A) Schematic of the optical setup of the DMD-based hyperspectral imaging system. L; Lens, M; Mirror, AOTF; Acousto-optic tunable filter, DMD; Digital micromirror device. (B) Spectral profiles of the input light source measured before and after reflection from the DMD, showing consistency in spectral shape with a slight reduction in intensity due to reflection losses. (C) Spectral data acquired by the spectrometer under four representative DMD patterns. Left: corresponding wide-field images; Right: spectral profiles measured at each selected region. Scale bar is 0.5 mm. (D) Representative wide-field images captured at five central wavelengths (450, 500, 550, 625, and 700 nm) with a 5 nm bandwidth. The overlapped image was generated by averaging the four spectral images to assess wavelength-dependent imaging consistency. Scale bar is 0.5 mm.
