Remote identification of optical systems by time-gated multi-wavelength retro-reflection

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Authors
  1. Auclair, M.
  2. Fortin, J.
  3. Sheng, Y.
Corporate Authors
Defence R&D Canada - Valcartier, Valcartier QUE (CAN)
Abstract
We propose and demonstrate a multi-wavelength approach based on time-gated retro-reflection to discriminate false alarms from optical systems (OSs). Any objects other than optical systems are considered as false alarms. The detecting platform consists in a combination of a pulsed laser synchronized with a gated camera and a laser rangefinder. A Schmidt-Cassengrain telescope was modified to inject the light of laser sources and to collect the retro-reflected signal in a monostatic configuration. The filtering method is based on the chromatic aberrations of the optical systems of interest which are measured using multiple interrogation wavelengths. A formula to evaluate the opticla cross section (OCS) at the selected wavelenghts is used for identification and relies on the system signature to discriminate the false alarms. We also explore the possibility to perform multiple simultaneous detections and target identification.
Report Number
DRDC-VALCARTIER-SL-2010-070 — Scientific Literature
Date of publication
01 Dec 2009
Number of Pages
13
DSTKIM No
CA033845
CANDIS No
533285
Format(s):
Document Image stored on Optical Disk

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