機械的走査形サーモグラフィ装置の熱画像ひずみ(機械力学,計測,自動制御)

The distortion of thermogram, which is caused by the scanning speed and the drawing performance, is one of the most important performance indices of thermograph in addition to the noise equivalent temperature difference and the minimum detectable size. In particular, the distortion of thermogram occurs when taking a thermogram of moving object, if the scanning speed of the thermograph is not so high enough. lt is necessary to evaluate each performance index of thermograph in order to establish the effective and quantitative measurement. lt is also important to clarify the cause of distortion. The distortion of thermogram for medical thermographs has already been standardized in Japanese Industrial Standard (JIS). The standard says that the distortion of thermogram is determined from the ratio of length to breadth in the thermogram of a circular test pattern. 0n the other hand, this paper proposes a new method how to estimate the distortion more precisely than the previous standard.