Insider Blog “Private” Surveillance
Posted May 22nd, 2007 by adminNASA Tech Briefs INSIDER 05/22/2007
Laser-Based Device Offers Alternative to Video Surveillance
The precision of the system is made possible by a high-resolution, two-axis laser scanner capable of looking at a 60-degree field of view in 0.0005-degree increments, dividing the field of view into more than 10 billion individual pointing locations. A camera with comparable resolution over the same field of view would require a 10,000-megapixel detector.
Existing light detection and ranging (lidar) systems, which use scattered light, are optimized for detecting human-sized objects. Another competing technology is bar codes and radio frequency identification. In addition to being susceptible to jamming, the bar code reader or RFID antenna must be within a few centimeters of the tagged object.
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