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Physical Aspects of Infrared Thermography

  • J. Steketee

Abstract

Thermography in the widest sense of the term can be defined as the recording of temperature. In a similar way the well known rotating drum which records the air-temperature can be thought of as a thermograph. Indeed, such an instrument is often combined with a barograph and/or a hygrograph. However, nowadays the term thermography is mostly used in a narrower sense for a method of forming an image (the thermogram) of the temperature distribution over the surface of a body1 and this is achieved by using the radiation emitted from the surface of the body. Some authors call this tele-thermography to distinguish the method from contact thermography in which the thermal sensor is in direct contact with the body (eg liquid crystal thermography).2 In (tele-) thermography we may distinguish:
  1. 1.

    Infrared thermography using the infrared radiation emitted by the surface of the body at wavelengths between 0.8 μm and 1 mm.

     
  2. 2.

    Microwave Thermography using the microwave energy emitted by the body at wavelengths between 1 mm and 1 m.3

     

Keywords

Heat Transfer Coefficient Skin Temperature Modulation Transfer Function Spectral Emissivity Infrared Thermography 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Press, New York 1984

Authors and Affiliations

  • J. Steketee
    • 1
  1. 1.Department of Biological and Medical PhysicsErasmus UniversityRotterdamThe Netherlands

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