A highly novel approach to a Compact Robust Imaging Lidar System is under development as a powerful tool for detecting and identifying a range of targets through fog and cloud.
The compact system has been demonstrated to be capable of target detection and identification far beyond the limits of normal capabilities of eye and / or camera capabilities under conditions where visibility is highly challenged by Fog or Cloud.
The Lidar employs a near-UV Laser (355 nm) with a short-duration pulse as the source.
It has been demonstrated that, since the scattering spectrum is virtually independent of wavelength (near UV through SWIR), to obtain “vision” through fog and cloud, a near-UV system has major advantages due to the combination of eye safety and the maturity of laser and imaging photon detector technologies.
A novel photon-counting, range-gating detector is employed with a resolution at worst limited by the pulse duration of the laser – 7 n.sec or equivalent to 1 metre.
Such a detector provides the ultimate in terms of performance (signal to noise ratio) allowing the reconstruction of precise information on targets that are otherwise totally invisible.
Depending on application of the user, the laser power and laser size can be adapted if necessary to increase the maximum operational range.
To view a PowerPoint presentation given at Shrivenham recently right-click the following link and 'Save link as...' Imaging Lidar
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Target Detection and Identification through Mist, Fog and Cloud
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