Back to results
US 4,794,619 AGranted
Optical fiber temperature sensor
AssigneeConax Buffalo Corporation
InventorGeorge W. Tregay
Life of this patent
Estimating the term…
Abstract
A temperature measuring device comprises an optical temperature probe (20) and a control module (21). Thermal emission from a recess (28a, 28b) in the tip end portion (23) of an optical fiber (22) is transmitted to the remote end (26) of the fiber for detection by the control module. The recess provides improved sensor capability with regard to maintaining constant emissivity and rapid response time. The recess is suitable for both single crystal optical fiber and optical fiber with a core-and-cladding construction.
Claims15
A temperature measuring device, consisting of:
- an optical fiber element having a tip end portion for insertion into a region wherein temperature is to be measured and having a remote end, said element providing a path for transmission of radiant power between said tip end portion and said remote end;
- thermally-emissive means extending into said tip end portion from an outer surface thereof to provide a thermally-emissive surface internal to said transmission path, said emissive surface having a thermal-emissivity characteristic higher than that of said optical fiber element;
- and
- detector means disposed at the remote end of said element for producing an electrical signal which varies as a function of the magnitude of radiant power transmitted along said path.
1 more element
Dependencies are inferred from the claim text.