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US 8,947,669 B2Granted
Optical gas detector
AssigneeCommissariat A L'energie Atomique Et Aux Energies Alternatives
InventorsSergio Nicoletti, Pierre Barritault, Mickaël Brun
Life of this patent
Estimating the term…
Abstract
A gas detector including: an assembly of two coaxial parabolic reflective caps having opposite concavities, and a wafer arranged in the focal plane of the two caps, at the center of this focal plane, comprising, back-to-back: a diverging light emitter directed towards the first cap and a light receiver directed towards the second cap, wherein the two caps are distant substantially by the sum of their focal distances plus the thickness of the wafer.
Claims7
A gas detector comprising:
- an assembly of two coaxial parabolic caps having opposite concavities, and
- a wafer arranged in the focal plane of the two caps, at the center of the focal plane, comprising, back to back:
- at least one diverging light emitter directed towards the first cap, and
- at least one light receiver directed towards the second cap,
- wherein the two caps are distant substantially by the sum of their focal distances plus the thickness of the wafer, and
- wherein the wafer is formed of portions of plates of a material transparent to the wavelength corresponding to the absorption line of the gas to be detected, and are placed against each other with an interposed layer of an opaque material pierced with an opening providing a direct optical communication between the emitter and one at least of the receivers.
3 more elements
Dependencies are inferred from the claim text.