title: Target detection in turbid medium using polarization-based range-gated technology.
abstract: Range-gated technology is well known for its good reliability, large field of view (FOV) and low cost in target detection through scattering or turbid medium. However, the tail-gating technology suffers from low signal-to-noise ratio in high turbidity levels due to superposition of photons multiply scattered from the medium and that reflected from the target. In this paper, polarization properties of multiply scattered photons emerging from the turbid medium are studied. Results demonstrate that diffusive photons are almost completely depolarized with no diattenuation and retardance. We combined the tail-gated technology with polarization detection method to effectively image in high level of turbidity. This approach showed about two times enhancement in image contrast as compared with the conventional range-gated technology.
authors.affiliation: Key Laboratory for Physical Electronics and Devices of the Ministry of Education, Xi’an Jiaotong University, Xi’an 710049, China.
authors.forename: Jinge
authors.initials: J
authors.lastname: Guan
authors.forename: Jingping
authors.initials: J
authors.lastname: Zhu
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D009391:Nephelometry and Turbidimetry / Q000295:instrumentation*; D012031:Refractometry / Q000295:instrumentation*