Patent ID: 6455851
Filing Date: 2002-09-24
Classification: G01N

Abstract:
A vehicle exhaust emission monitoring system comprising;an IR radiation source; a collimating optical system for collimating IR radiation from said IR source; a UV radiation source; a collimating optical system for collimating UV radiation from said UV source; said IR radiation and UV radiation being physically spatially offset at the source; a reflector mirror assembly on the opposite side of a path of travel of said vehicle from said IR and UV radiation; said IR and UV radiation converging at said reflector mirror so that said IR and UV radiation makes multiple passes across said path; optical assemblies receiving and calibrating said IR and UV radiation respectively; IR and UV spectrometers receiving said IR and UV radiation respectively from said optical assemblies for generating wavelength resolved spectra; and processing means for processing said wavelength resolved spectra from said IR and UV spectrometers to detect and measure an analyte of interest; whereby a plurality of analytes can be detected and analyzed.