Temperature measuring arrangements

Details Temperature measuring arrangements Temperature measuring arrangements

G - Physics

01

J

73/52

G01J 5/02 (2006.01)

Patent

CA 1263252

ABSTRACT IMPROVEMENTS RELATING TO TEMPERATURE MEASURING ARRANGEMENTS A temperature measuring arrangement comprises means for generating and launching light pulses into one end (i.e. launch end) of an optical fibre which serves as a temperature sensing element and optical directional coupling means located at the launch end of the temperature sensing element for directing the total back-scattered light from temperature measurement points along the sensing element into an optical back-scatter selection means which filters out a band of back-scattered light of wavelengths embracing so-called Rayleigh and Mie and Brillouin wavelengths but which permits passage of light at the so- called Stokes (Raman) and Anti-Stokes (Raman) wavelengths to processing means for providing temperature measurements.

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