Infrared Aerosol Sensor Validated at 11 Meters Using Traffic Sign Reflections

Pacific Northwest National Laboratory demonstrated standoff chemical detection on nonmetallic surfaces in lab tests, removing the need for field-deployed mirrors while leaving outdoor performance unmeasured.

Researchers at Pacific Northwest National Laboratory have validated an infrared spectroscopy system that identifies chemical aerosols and vapors using light reflected from ordinary nonmetallic surfaces at distances up to 11 meters [6]. The measurement, published in Applied Optics, establishes a functional baseline for standoff detection on materials like traffic signs and tree trunks without requiring specialized optical targets [1]. This specific range was achieved under controlled laboratory conditions, providing a verified floor for the technology’s capability rather than a guaranteed field specification.

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