Patent ID: 7684043
Filing Date: 2010-03-23
Classification: G01N

Abstract:
1. A system for free space, optical remote sensing for a potential threat agent, the system comprising: a laser system for emitting two beams of coherent light at first and second different wavelengths; a sensor agent located remotely from said laser system that is irradiated by said laser system, the sensor agent having a characteristic such that a wavelength of a reflected spectral peak thereof closely approximately matches said first wavelength, in the absence of said potential threat agent, and such that said reflected spectral peak changes in wavelength from said first wavelength when said sensor agent is exposed to potential threat agent; and a detector system that receives and analyzes said beams of coherent light generated by said laser system that is reflected from said sensor agent, to determine if a shift in said reflected spectral peak away from said first wavelength has occurred, indicating a presence of said potential threat agent.