Optics: measuring and testing – For light transmission or absorption – Of fluent material
Reexamination Certificate
2008-07-21
2010-02-16
Toatley, Jr., Gregory J (Department: 2877)
Optics: measuring and testing
For light transmission or absorption
Of fluent material
C356S432000, C356S440000, C356S445000, C250S573000, C250S576000
Reexamination Certificate
active
07663756
ABSTRACT:
Devices and method for photo acoustically detecting a gas are disclosed. In one illustrative embodiment, a gas sensor includes an optical cavity defined by one or more optical segments separating at least two mirrors. A photo acoustic cell, configured to receive a gas from the surrounding environment, is provided at least partially within one or more of the optical segments of the optical cavity. One of the at least two mirrors is configured to couple electromagnetic radiation into the optical cavity and to interact with the gas. A detector is acoustically coupled to the photo acoustic cell to detect absorption of the electromagnetic radiation by the gas.
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Paul et
Alli Iyabo S
Fredrick Kris T.
Honeywell International Inc
Toatley Jr. Gregory J
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