H - Electricity – 03 – M
Patent
H - Electricity
03
M
H03M 1/12 (2006.01) G01J 3/02 (2006.01) G01J 3/10 (2006.01) G01N 21/05 (2006.01) G01N 21/84 (2006.01)
Patent
CA 2146498
A spectrophotometer system includes an optics block housing an excitation lamp and a cell for receiving a gas to be detected. The excitation lamp excites atoms of the gas to be detected to produce photons. The spectrophotometer system also includes a photomultiplier tube assembly and an analog-to-digital converter. The photomultiplier tube assembly detects the photons, and produces an analog output accordingly. The analog-to-digital converter converts this analog output to a digital output. The photomultiplier tube assembly and the analog-to-digital converter of a spectrophotometer system are calibrated together so that a zero input to the analog-to-digital converter may be defined as an absence of photons. The optics block is config- ured to minimize scattering of light, without a lens, so that the output of the spectrophotometer system is a function of the number of atoms of the gas to be detected and not of scattered light.
Brown Craig W.
Danilchik Paul
Brooks Rand Ltd.
Smart & Biggar
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