Fig. 3: The PQDF-based hyperspectrometer.
From: Broadband perovskite quantum dot spectrometer beyond human visual resolution
a The architecture of the developed PQDF-based hyperspectrometer. b The utilized PQDF filter array, containing 361 different PQDFs and with a size of 7 × 7 cm. c The reconstructed spectrum results of a standard X-Rite color checker. GD stands for the ground-truth spectrum, calibrated using a commercial spectrometer, and RE represents the spectrum reconstructed by our method. The bottom-right graph shows the reconstruction error of different swatches. d Calibrated spectral resolution of the spectrometer compared with human color vision. The spectral range is 250–1000 nm
