Thermography System Implementation in Practice

Abstract

It is necessary to meet three basic requirements to achieve precise imaging using a thermographic camera [85]:

• 1 The right thermal range must be selected in the program settings of a camera. For example when scanning a living organism set the thermal range to -20 to 100 °C using a long-wave camera like the Fluke Ti55/20. Currently there are also more sensitive cameras with a smaller thermal range available.

• 2 The correct camera focus must be set, taking into consideration the surface characteristics of a measured object, such as the reflections off shiny surfaces. Focusing is done manually by rotating the camera lens or by using joystick. Focusing itself should be carried out using a gray scale because of the human eye’s sensitivity.

• 3 The correct optimal distance and angle of measurement must be set according to camera’s position as opposed to that of the object of measurement (Fig. 44).