Fig. 4: Practicing CBCN with CPDI in fire rescue.
From: Covalent-bonding chiroptical network structures for circular polarization differential imaging
a Image illustration for identifying the target from fire light. Three recognition modalities are shown including infrared thermal imager, luminance meter, and polarization binocular camera. b–d Evaluation of recognition capabilities: thermal imaging (b), intensity imaging (c), and CPDI (d), using candle flames to verify the accurate capture of the CBCN-made-target. Scale bars, 1 cm. e–g CPL spectra of blue-, green-, and red-emitting CBCN at 2 °C intervals within the temperature range from 20 to 100 °C, respectively. h Schematic application for CPDI in fire scenario. i Photograph of the integrated smart device for CPDI, consisting of a binocular camera carried by an intelligent robotic platform (serving as the signal recognition system) and a terminal (serving as the information display and processing). The inset shows the robotic platform in operation. j–m CPDI monitoring of a person with varying movements in simulated fire scenarios, showing the precise identification capabilities of CPDI even with deformation of the polarization optical sensors. Scale bars, 1 cm.
