Image converter - Thermography

A description is presented of a device which, under certain conditions, can be used to solve problems of thermometry. The thermometric procedure involved makes it possible to study temperature radiators above 400 C with respect to their temperature distribution. The optical range from 0.7 to 1.2 micrometers is used for imaging the object. An image converter is used to produce a radiating image at wavelengths corresponding to the maximum sensitivity of the eye. The temperature determination makes use of calibration areas which correspond to accurately defined black temperatures. The image of the temperature distribution of the object is replaced by the image of the luminous density distribution on the screen of the image converter. The image on the screen is photographed and the obtained black-and-white negative is evaluated to determine the temperature distribution.