Laser-based in-situ exhaust gas sensor
AssigneeIndrio Technologies, Inc
InventorRitobrata Sur
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Abstract
A laser absorption spectroscopy exhaust gas sensor includes an optical cell with porous walls having pores with a mean diameter in the range of 0.1 nm to 1 mm; gold mirrors within the optical cell positioned to support a multi-pass optical path within the optical cell; an active heating element adapted to heat the optical cell to prevent condensation; a laser adapted to generate a laser beam; an optical detector adapted to detect a returning laser beam; and a processor for controlling the laser and the active heating element and for analyzing signals from the optical detector to identify a gas in the optical cell.
Claims17
A laser absorption spectroscopy exhaust gas sensor comprising:
- an optical cell with porous walls having pores with a mean diameter in the range of 0.1 nm to 1 mm;
- gold mirrors within the optical cell positioned to support a multi-pass optical path within the optical cell;
- an active heating element adapted to heat the optical cell to prevent condensation;
- a laser adapted to generate a laser beam;
- an optical detector adapted to detect a returning laser beam;
- and
- a processor that is isolated from the optical cell by a flexible conduit for controlling the laser and the active heating element and for analyzing signals from the optical detector to identify a gas in the optical cell.
Dependencies are inferred from the claim text.