Abstract

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 20 ?m, a thicker TLC coating shows a relatively smaller measurement uncertainty, but the effect of the coating thickness is non-distinctive on the measurement uncertainty.

© 2010 Chinese Optics Letters

Absorption measurements in optical coatings by lock-in thermography

Feng Liu and Laurent Gallais
Appl. Opt. 56(33) 9225-9232 (2017)

Wide band interferometry for thickness measurement

Santiago Costantino, Oscar E. Martínez, and Jorge R. Torga
Opt. Express 11(8) 952-957 (2003)

Measurements of the Thickness Uniformity of Liquid Crystal Layer

Yun Zhisheng, Liu Jifang, He Zhengquan, and Li Yulin
Appl. Opt. 36(34) 9109-9110 (1997)

Quantitative inspection of coating thickness by flash-pulse thermography and time-power transformation evaluation

M. Švantner, L. Muzika, and Š. Houdková
Appl. Opt. 59(17) E29-E35 (2020)

Coating Thickness Measurement by Interferometry*

M. F. Bechtold
J. Opt. Soc. Am. 37(10) 873-878 (1947)