title: Imaging live humans through smoke and flames using far-infrared digital holography.
abstract: The ability to see behind flames is a key challenge for the industrial field and particularly for the safety field. Development of new technologies to detect live people through smoke and flames in fire scenes is an extremely desirable goal since it can save human lives. The latest technologies, including equipment adopted by fire departments, use infrared bolometers for infrared digital cameras that allow users to see through smoke. However, such detectors are blinded by flame-emitted radiation. Here we show a completely different approach that makes use of lensless digital holography technology in the infrared range for successful imaging through smoke and flames. Notably, we demonstrate that digital holography with a cw laser allows the recording of dynamic human-size targets. In this work, easy detection of live, moving people is achieved through both smoke and flames, thus demonstrating the capability of digital holography at 10.6 μm.
authors.affiliation: CNR Istituto Nazionale di Ottica-Largo E Fermi, 6 50125 Firenze, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Locatelli
authors.forename: E
authors.initials: E
authors.lastname: Pugliese
authors.forename: M
authors.initials: M
authors.lastname: Paturzo
authors.forename: V
authors.initials: V
authors.lastname: Bianco
authors.forename: A
authors.initials: A
authors.lastname: Finizio
authors.forename: A
authors.initials: A
authors.lastname: Pelagotti
authors.forename: P
authors.initials: P
authors.lastname: Poggi
authors.forename: L
authors.initials: L
authors.lastname: Miccio
authors.forename: R
authors.initials: R
authors.lastname: Meucci
authors.forename: P
authors.initials: P
authors.lastname: Ferraro
mesh_terms: D005390:Fires; D006696:Holography / Q000379:methods*; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods*; D007259:Infrared Rays; D012906:Smoke
chemical_list: D012906:Smoke