Gallery of Infrared Images

Infrared imaging uses the fact, that every body at a temperature above absolute zero (T>0K) emits thermal radiation. Thermography utilizes this thermal radiation to generate an  image similar as visible light generates an image in a Camcorder (the main difference being the optics and the detectors, which operate in different spectral regions). Input parameters are the material properties in terms of the emissivity.

Wer könnte das sein ? Wer könnte das sein ? Wer könnte das sein ? Wer könnte das sein ?
Some members of the working group on infrared imaging.


Aufnahme des Lesley-Würfels im Sichtbaren

Thermographie Aufnahme eines Lesley-Würfels

A Leslie cube, filled with warm water illustrates that the emissivity depends on material and surface structure. Polished metals have low emissivity and appear darker.


Part of the University of Applied Sciences in Brandenburg.


Hidden structure: half timbered house behind plaster as seen in the infrared and visible spetcral region.


Visualization of two heaters. The left one is open, the right one closed.


Visualization if hidden structures: IR imaging of a floor heating system while warming up allows to locate leaks.


Transition from diffuse scattering in the visible to specular reflection in the infrared. The effect depends on the ratio of dimension of surface structure to wavelength. The transition occurs because of the approximately 10 times larger wavelength of the IR.


Person wearing glasses made of normal glass (right side) and of NaCl (left side). Normal galss is opaque in the IR whereas NaCl is transparent.


A silicon waver is opaque in the visible (right), but transparent in the IR (middle). The intensity just drops according to the reflection losses when compared to the image without waver (left).


Initial change of the temperature of a trombone upon playing e.g. 30 seconds. The corresponding frequency response changes cease mostly after 2-3 minutes.


IR imaging of a squash ball before and after playing for several minutes. The ball heats up due to inelastic collision processes.


The warming up of a bicycle tire upon braking with blocked wheels: due to friction, energy is transferred both into the tire (right) as well as the floor (left).


A small cavity made of graphite (right) not being in thermal equilibrium:. Upon heating from the sides (left), it emits more radiation than the surfaces, upon cooling with ice cubes (middle) it emits less.


Bénard convections of hot oil in a pan.


Direct visualization of the infrared absorption of the greenhouse gas CO2. A hot surface is observed through either normal air with 360 ppm CO2 (left) or atmospheric pressure of pure CO2 (middle). The experimental set up is also shown (right).


Heat producing elements on the electronic board of computers are usually well separated.


The friction upon tearing two different weights (1kg and 5kg) on a plate across the floor leads to a warming of floor and plate, depending on weight.


Due to the differences in water content, toast bread will get warmer compared to Wasa bread when heated for the same period in a microwave oven.



Cold regions of water moving away from the surface of a moving ice cube.


Finger writing on the floor.

To be continued.


More information: Prof. Dr. Vollmer, Prof. Dr. Möllmann

Last Revision: 14 December 2000,, WebTeamPIW