Thermal Imaging Device using Infrared-to-Visible Converter Made of Temperature Sensitive Phosphor

Abstract

An infrared thermal imaging device using infrared-to-visible convertor made of Eu(TTA) 3 was developed and evaluated. A polymer based structure enabled high thermal isolation with simple structure, which enabled detection of low temperature object such as human. In addition, noise reduction digital methods using averaging filter and Kalman filter were proposed and evaluated. Both digital filters increased signal-to-noise ratio from 8.1 to 18 and 21, respectively, which means both filters had similar noise reduction effect. However, the Kalman filter had faster response compared with the averaging filter, therefore it is suitable for the noise reduction method of the thermal imaging device.