Blackbody radiation sensing optical fiber thermometer system

A system for measuring temperature within a region to be tested comprising:

• (a) sensor means responsive to the temperature within said region for transmitting light energy generated as a function of said temperature along an optically transmissive path;
• (b) detector and amplifier means responsive to said light energy for producing an output signal representative of the intensity of said light energy;
• and
• (c) signal processing means for electronically providing from said output signal a display signal representative of the temperature within said region, said signal processing means including computer means for calculating the temperature (T) within said region as a function of the radiance of light energy (L) according to the function ##EQU12## where f(.lambda.,T) is Planck's function, where .lambda. is the wavelength of said light energy and .lambda..sub.1 and .lambda..sub.2 are upper and lower limits respectively, of an optical filter disposed between said sensor means and said detector means.

A system for measuring temperature within a region to be tested comprising:

• (a) sensor means responsive to the temperature within said region for transmitting light energy generated as a function of said temperature along an optically-transmissive path;
• (b) detector and amplifier means responsive to said light energy for producing and output signal;
• (c) signal processing means responsive to said output signal for calculating a display signal representing a temperature value corresponding to the intensity of said light energy utilizing a formula containing a constant representing losses of said light energy along said optically-transmissive path;
• and
• (d) optical path calibration means for measuring losses of said light energy along said optically transmissive path and for correspondingly altering said constant.