Patent ID: 8636408

Claim:
A temperature measurement system comprising: a laser light source configured to output laser light; an optical fiber which is installed in a temperature measurement area and which the laser light enters; and a temperature measurement unit configured to acquire a measured temperature distribution of a temperature of the temperature measurement area along an installation path of the optical fiber by detecting backscattered light of the incident laser light in the optical fiber and to calculate a corrected temperature distribution of a temperature of the temperature measurement area by correcting the measured temperature distribution, wherein the temperature measurement unit sequentially makes a correction for the measured temperature distribution a plurality of times and calculates the corrected temperature distribution the plurality of times so as to make a square error between a convolution of a transfer function of the optical fiber along the installation path and the corrected temperature distribution and the measured temperature distribution smaller in each of the corrections, and the temperature measurement unit also replaces in each of the corrections a corrected temperature at a specific point of the installation path with an estimated temperature at the specific point, the corrected temperature being included in the corrected temperature distribution calculated in each of the corrections.