GAS DETECTOR AND METHOD OF DETECTION

摘要

A gas detector and method are presented. The gas detector includes a launcher unit for coupling and merging light beams in mid-infrared and infrared wavelength ranges into a single light beam and directing the merged single light beam towards a gas flow path; a receiver unit for generating at least one photo detector current signal based on the light beam transmitted through the gas flow path; and a control unit for processing at least one photo detector current signal to measure concentration of the at least two gases present in the gas flow path.

主权项

1. A gas detector comprising
a launcher unit comprising:
a first set of light sources for emitting light beams in a mid-infrared wavelength range with one of the light beams having a different wavelength than at least one other of the light beams,a first light transmission network for bundling the light beams from the first set of light sources to produce a first bundled light beam,a second set of light sources for emitting light beams in an infrared wavelength range with one of the light beams having a different wavelength than at least one other of the light beams,a second light transmission network for bundling the light beams from the second set of light sources to produce a second bundled light beam, anda coupling unit for receiving and coupling the first and second bundled light beams to produce a single coupled light beam and for transmitting the coupled light beam towards a gas flow path; and a receiver unit for receiving the coupled light beam after the coupled light beam has passed through the gas flow path; wherein the coupling unit comprises a dichroic mirror; wherein the dichroic mirror comprises a semitransparent dichroic mirror; and wherein the dichroic mirror comprises a convex surface and a concave surface and receives one of the first and second bundled beams at the convex surface and the other of the first and second bundled beams at the concave surface.