G - Physics – 01 – N
Patent
G - Physics
01
N
354/29, 73/54
G01N 21/17 (2006.01) G01J 3/12 (2006.01) G01J 3/42 (2006.01) G01N 21/35 (2006.01)
Patent
CA 1187716
ABSTRACT OF THE DISCLOSURE An automated acousto-optic tunable filter infra- red analyzer system useable in a variety of industrial and commercial control applications. The system relies upon a narrow band pass tunable acousto-optic filter which is selectively tuned by predetermined rf frequency signals to selectively transmit the narrow band pass of interest which corresponds to a specific molecular species for identification and analysis. The system includes a micro- computer and associated memory function to measure and compare detected signals from an infrared detector which converts the filtered infrared signal to an electrical signal. The memory provides control signals for the computer and for controlling the sequence and frequency of rf energy applied to tune the filter. In this way, the near to mid range infrared can be analyzed for absorption bands corresponding to predetermined molecular species such as combustion product gases, and a feedback signal generated to control the combustion process.
419833
Gottlieb Milton S.
Steinbruegge Kenneth B.
Oldham And Company
Westinghouse Electric Corporation
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