Optical property evaluation of infrared transmission film

In recent years, new measurement and inspection techniques using infrared camera are being applied in various research and development fields. The advantage of infrared camera is the ability to measure time series two-dimenstional surface temperature distributions without contact. In this report, various special resin materials, which representative infrared transmission is stronger than germanium and the price is low, are selected to devise a new method to obtain the infrared transmission from the theory of thermal radiation by applying an infrared camera at different temperature. Experimented results shows that the transmittance of ITF05, ITF10, PET05, PMMA10 is 45~65 %, 35~5 %, 0~3 %, 0~1 %, respectively. Although the transmittance of these special resin materials are smaller than Ge20, which transmittance for both visible light and infrared light. During the data processing, uncertainty analysis is also applied to analyze the uncertainty of measured transmittance for all materials.