Patent ID: 7432508

Claim:
A gas measurement system comprising: a radiation source assembly; a lens adapted to receive infrared radiation from the radiation source assembly and to collimate the received infrared radiation; a dichroic splitter adapted to receive collimated infrared radiation from the lens and to separate the received infrared radiation into a first beam and a second beam; a mirror adapted to receive the first beam from the dichroic splitter; a first filter adapted to receive the first beam from the mirror; a second filter adapted to receive the second beam from the dichroic splitter; a first detector adapted to receive the first beam from the first filter, wherein the first detector is a generally planar element disposed in a first plane, and wherein the first detector is oriented such that the first beam is directed at a radiation receiving surface of the first detector at a generally right angle; and a second detector adapted to receive the second beam from the second filter, wherein the second filter is a generally planar element, wherein the second detector is oriented such that the second beam is directed at a radiation receiving surface of the second detector at a generally right angle, and wherein the first detector and the second detector are disposed such that the radiation receiving surfaces of the first detector and the second detector are substantially parallel to one another.