7 May 2010 Mobile optical detection system for counter-surveillance
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Abstract
There exists a current need to rapidly and accurately identify the presence and location of optical imaging devices used in counter-surveillance activities against U. S. troops deployed abroad. The locations of devices employed in counter-surveillance activities can be identified through detection of the optically augmented reflection from these devices. To address this need, we have developed a novel optical augmentation sensor, the Mobile Optical Detection System (MODS), which is uniquely designed to identify the presence of optical systems of interest. The essential components of the sensor are three, spectrally diverse diode lasers (1 ultraviolet/2 near-infrared) which are integrated to produce a single multi-wavelength interrogation beam and a charge-coupled-device (CCD) receiver which is used to detect the retroreflected, optical beam returned from a target of interest. The multi-spectral diode laser illuminator and digital receiver are configured in a pseudo-monostatic arrangement and are controlled through a customized computer interface. By comparison, MODS is unique among OA sensors since it employs a collection of wavelength-diverse, continuous-wave (CW) diode laser sources which facilitate the identification of optical imaging devices used for counter-surveillance activities. In addition, digital image processing techniques are leveraged to facilitate improved clutter rejection concomitant with highly-specific target location (e.g., azimuth and elevation). More, the digital output format makes the sensor amenable to a wide range of interface options including computer networks, eyepieces and remotely-located displays linked through wireless nodes.
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Laurel Sadler, Troy A. Alexander, "Mobile optical detection system for counter-surveillance", Proc. SPIE 7694, Ground/Air Multi-Sensor Interoperability, Integration, and Networking for Persistent ISR, 76940Y (7 May 2010); doi: 10.1117/12.850465; https://doi.org/10.1117/12.850465
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