Effect of coating thickness on the calibration and measurement uncertainty of a wide-band liquid crystal thermography  

作　　者：饶宇 藏述升 万超一 

机构地区：[1]Institute of Turbomachinery,School of Mechanical and Power Engineering, Shanghai Jiao Tong University

出　　处：《Chinese Optics Letters》2010年第4期395-397,共3页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China under Grant No.50806045

摘　　要：The liquid crystal thermography is a high-resolution and non-intrusive optical technique for full-field temperature measurement.We present detailed calibration data for a wide-bandwidth thermochromic liquid crystal（TLC） to investigate the effect of the coating thickness on the hue-temperature characteristics and the measurement uncertainty of the TLC.It is found that the coating thickness has appreciable effect on the TLC hue-temperature curve.For TLC coatings with the thickness over 20μm,a thicker TLC coating shows a relatively smaller measurement uncertainty,but the effect of the coating thickness is non-distinctive on the measurement uncertainty.The liquid crystal thermography is a high-resolution and non-intrusive optical technique for full-field temperature measurement.We present detailed calibration data for a wide-bandwidth thermochromic liquid crystal（TLC） to investigate the effect of the coating thickness on the hue-temperature characteristics and the measurement uncertainty of the TLC.It is found that the coating thickness has appreciable effect on the TLC hue-temperature curve.For TLC coatings with the thickness over 20μm,a thicker TLC coating shows a relatively smaller measurement uncertainty,but the effect of the coating thickness is non-distinctive on the measurement uncertainty.

关 键 词：CALIBRATION COATINGS Liquid crystals TEMPERATURE Thermography (temperature measurement) Thickness measurement 

分 类 号：O753.2[理学—晶体学]