Patent ID: 7952717
Filing Date: 2011-05-31
Classification: G01K

Abstract:
1. A temperature measuring apparatus comprising: a light source; a first splitter for dividing a light beam emanated from the light source into a measurement beam and a reference beam; a second splitter for dividing the measurement beam coming from the first splitter into a first to an nth measuring beam; a reference beam reflector for reflecting the reference beam coming from the first splitter; an optical path length adjuster for adjusting an optical path length of the reference beam reflected from the reference beam reflector; a reference beam transmitting member for transmitting the reference beam coming from the first splitter to a reference beam irradiation position from which the reference beam is irradiated onto the reference beam reflector; a first to an nth measuring beam transmitting member for transmitting the first to the nth measuring beam coming from the second splitter to measuring beam irradiating positions from which the measurement beams are irradiated onto a first to an nth measurement points of a temperature measurement object; a photodetector for measuring an interference between the reference beam reflected from the reference beam reflector and the first to the nth measuring beam reflected from the first to the nth measurement point of the temperature measurement object, wherein the optical path lengths of the first to the nth measuring beam from the second splitter to the first to the nth measurement points of the temperature measurement object are different from each other; and a controller that stores, as initial peak position data, positions of interference peaks respectively measured in advance by irradiating the first to the nth measuring beam onto the first to the nth measurement point of the temperature measurement object, and compares the initial peak position data to positions of interference peaks respectively measured during a temperature measurement to thereby estimate a temperature at each of the first to the nth measurement point.