Patent ID: 6840669
Filing Date: 2005-01-11
Classification: G01K,G01L,G01N,Y10T

Abstract:
1. A method for measuring the temperature of an object or environment with a photoluminescent probe, comprising the steps of: a) providing a probe in thermal communication with said object or environment, said probe including a photoluminescent material so characterized that, when illuminated at any temperature within the temperature range of application of the method with a first excitation light of intensity P b) illuminating said material with said first excitation light of said wavelength or wavelengths λ c) directing a fraction of said intensity I d) illuminating said material, subsequently to its illumination with said first excitation light, with said second excitation light of an intensity P e) directing a fraction of said intensity I f) measuring the relative intensities of the luminescence lights generated by said first and said second excitation lights received by said photodetector means, said relative intensities being an indicator of the temperature being measured.