Abstract
A recent breakthrough in the growth of excellent
quality single crystal thallium arsenic selenide
(TAS) on a production basis has made it possible
to buLld an electronically controlled acousto
optic tunable filter (AOTF) capable of operating
in the infrared. Such a filter with integral
ultrasonic transducer can be used in place of
mechanical filter wheels, spinning gas cells,
moving mirrors, diffraction gratings and
mechanical light choppers. The TAS AOTF
produces an electronically controllable narrow
panel infrared filter capable of being tuned to
any infrared frequency desired. It provides a
chopped and tuned IR source that can be directed
across the stack on any combustion process to
measure the concentrations of CO, CO2, SO2,
C2H6, CH4, NO, NO2, H2O, etc.
simultaneously.
Nelson, R. L. (1986). Technology Makes Solid State Multi-Gas Emission Monitoring Possible. Energy Systems Laboratory (http://esl.tamu.edu). Available electronically from
https : / /hdl .handle .net /1969 .1 /93072.