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Various sensor materials are developed and evaluated for fluorescence thermometer applications. Sensor materials such as ruby (Al2O3), YALO (YAlO3), YAG (Y3AI5O12), rare-earth ultra-phosphates, long afterglow phosphors, starch and organic pigments are evaluated based on temperature dependences of photoluminescence (PL) lifetime and/or PL intensity. Characteristics of these sensor materials are reported...
Two-dimensional photoluminescence (PL) image from sensor material is evaluated for fluorescence thermometer application. Two dimensional PL image is observed using CCD video camera under blue and/or UV LED illuminations. Red colored PL image can be observed from ruby sensor under illumination of blue LED. Brightness of red signal of PL image from ruby sensor varies linearly with temperature from 20...
Fluorescence thermometer based on peak intensity of photoluminescence (PL) is evaluated using Ti doped sapphire (Al2O3) crystal. Broad PL peak is seen at lambda=725 nm. PL peak intensity is found to be sensitive to temperature. Fluorescence thermometer based on temperature dependence of PL peak intensity is reported using Li doped sapphire crystal.
Temperature dependence of peak intensity and peak intensity ratio of photoluminescence (PL) from composite thermo-sensor with Cr doped garnet crystal (YAG) is evaluated for fluorescence thermometer. Peak intensity of PL decreases with temperature. Intensity ratio of PL peaks increases linearly with temperature from 300 to 500 K. Composite sensor with Cr doped YAG is potentially useful sensor material...
Fluorescence thermometer based on peak intensity and peak intensity ratio of photoluminescence (PL) is developed using a silicone composite sensor with Cr doped spinel crystal. Standard deviation of temperature coefficient of PL peak intensity ratio is much smaller than those of PL peak intensity. PL peak intensity ratio is found to be useful for temperature measurement. Fluorescence thermometer based...
Fluorescence sensor sheet has been fabricated successfully by Cr doped YAlO3 powder and silicone resin, and characterized for applications as the thermo-sensor material. Fluorescence thermometer system using fluorescence sensor sheet enables non-contact temperature measurement in extraordinary conditions. In this system, temperature measurement technique based on the temperature dependence of Photoluminescence...
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