The optical detection system of FABIOLA

Enrico Battistelli; Riccardo Paolinetti; Carlo Pompei; Stefano Puccini

doi:10.1117/12.800131

3 October 2008 The optical detection system of FABIOLA

Enrico Battistelli, Riccardo Paolinetti, Carlo Pompei, Stefano Puccini

Proceedings Volume 7116, Optically Based Biological and Chemical Detection for Defence IV; 71160G (2008) https://doi.org/10.1117/12.800131
Event: SPIE Security + Defence, 2008, Cardiff, Wales, United Kingdom

Abstract

The research project FABIOLA (Fluorescence Applied to BIOLogical Agents detection), coordinated by EDA (European Defense Agency), has two main goals: to demonstrate the feasibility of detection of BW agents using LIF (Laser Induced Fluorescence) technique, and develop BW early warning point detection lab-demonstrator based on LIF. The Optical Detection System collects the fluorescence radiation emitted by the aerosol particle under test (hit by a sequence of two UV laser pulses with 50ns delay), splits it into four wavebands covering the 350-600nm range, and acquires the time decay shape by means of 4 ultra-fast MCP-PMTs that are read by a fast electronics. A fifth PMT is devoted to the acquisition of the elastically scattered signal at the same laser excitation wavelength (293 and 337nm) for data normalization. The Optical Detection System is based on waveband separation by a train of dichroic beamsplitters; high-pass filtering is used for rejection of the scattered excitation beam. A lens system provides parallel beam on dichroics and uniform illumination of MCP-PMTs. Main design drivers of ODS are the four selected fluorescence bands, the required fast response for acquiring decay time of ns-order, and the capability to operate with two excitation pulses (at 293 and 337nm) which shall be effectively rejected by fluorescence channels.

Citation Download Citation

Enrico Battistelli, Riccardo Paolinetti, Carlo Pompei, and Stefano Puccini "The optical detection system of FABIOLA", Proc. SPIE 7116, Optically Based Biological and Chemical Detection for Defence IV, 71160G (3 October 2008); https://doi.org/10.1117/12.800131

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