FLUORESCENCE TEMPERATURE SYSTEM DESIGN BASED ON SYNTHETIC OXIDE CRYSTAL

This article provides a description of the system for measuring temperature with Cr-doped crystals and a USB spectrometer. The same principle of measurement may also be used for other thermographic materials characterized by multiple spectral lines of different temperature sensitivities. The article presents some of the results obtained in the development of new generation temperature sensors that apply fluorescent synthetic oxide crystals. Such sensors have potential uses in biomedicine and in highly exacting industrial applications. Research involved some temperature optical characteristics of synthetic oxide crystals with an Al2O3 basis, such as Cr3+MgAl2O4(Cr:Spinel) and Cr3+Y3Al5O12(Cr:YAG), but also other variations doped with rare earth oxides. The method of measuring fluorescence intensity ratio and fluorescence lifetime is examined in detail. The article also provides a description of meter equipment used in measuring the fluorescence intensity ratio and fluorescence lifetime. Computer hardware and software for processing generated measurement signals are catalogued. A short review of obtained results and potential uses of such sensors in the field of temperature metrology is given in the final section of the article.