Abstract
Applying a choresteric liquid crystal, a temperature distribution on a surface, or in liquid, can be visualized qualitatively as a brilliantly colored map, and can be also determined quantitatively using a system of viedo-camera and image processor. This article reviews the art, forcusing on thermo-optical properties of microencapsulated liquid-crystal, which is the most common application mode, and the modern methods to determine a temperature map quantitatively.
