Locatelli M, Pugliese E, Paturzo M, Bianco V, Finizio A, Pelagotti A, Poggi P, Miccio L, Meucci R, Ferraro P
CNR Istituto Nazionale di Ottica-Largo E Fermi, 6 50125 Firenze, Italy.
Opt Express. 2013 Mar 11;21(5):5379-90. doi: 10.1364/OE.21.005379.
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.
能够看穿火焰背后的情况是工业领域尤其是安全领域面临的一项关键挑战。开发新技术以在火灾现场透过烟雾和火焰探测活人是一个非常理想的目标，因为这可以挽救生命。包括消防部门采用的设备在内的最新技术，使用红外测辐射热计用于红外数字相机，使使用者能够看穿烟雾。然而，此类探测器会被火焰发出的辐射蒙蔽。在此，我们展示了一种完全不同的方法，即利用红外波段的无透镜数字全息技术成功透过烟雾和火焰进行成像。值得注意的是，我们证明了连续波激光数字全息能够记录真人大小的动态目标。在这项工作中，通过烟雾和火焰都能轻松检测到活动的活人，从而证明了10.6μm数字全息技术的能力。
