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Unformatted text preview: 3/10/11 1 ECE 117 Instrumentation Electronics Lecture 16. Pyrometry Pyrometry The non-contact measurement of an objects temperature by measuring its spectral radiation. Blackbody radiation http://optoelectronics.perkinelmer.com/content/whitepapers/pyrometry.pdf Blackbody radiation http://optoelectronics.perkinelmer.com/content/whitepapers/pyrometry.pdf 3/10/11 2 Blackbody radiation Total radiation The total emitted radiation energy per second for all wavelengths increases with the fourth power of temperature Monochromatic radiation The radiation energy emitted at any particular wavelength increases as a function of temperature. E " T 4 E = radiation emission in W/m 2 T = temperature (K) of the object Emissivity ( ) The ratio of the energy radiated by an object to the energy radiated by a black body (perfect emitter) at the same temperature. Emissivity http://sales.hamamatsu.com/assets/applications/SSD/Characteristics_and_use_of_infrared_detectors.pdf Optical Pyrometer 3/10/11...
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- Spring '12