Fig. 4: Imaging of a heater in low-radiation mode at 15 m and 30 m from the lens.
a Experimental setup for imaging the heater using the sparse aperture. b Photograph of the heater in low-radiation mode. c Photograph of the heater’s strips and internal textures. Image of the heater at 30 m taken by the Golay6 + 1 aperture without a narrowband filter, before (d) and after (e) reconstruction. Image of the heater at 15 m taken by the Golay6 + 1 aperture without a narrowband filter, before (f) and after (g) reconstruction. h Photograph of the cross target positioned in front of the hot plate. i Seven frames extracted from a video with timestamps, captured by the Golay6 + 1 system after reconstruction, illustrating the cross at various positions within the images. The corresponding field of view (FoV) of each cross center is indicated.
