Through specific applications examples with sample images, this presentation introduces you to the basics of infrared (IR) imaging technology.

1. Infrared Imaging: Seeing the Invisible
Part One:
Physics

2. What Can You See in These Images?
NIR / SWIR LWIRVisible

3. Electromagnetic Spectrum:
A Helpful Taxonomy
Wavelength

4. IR Radiation - Characteristics
• Invisible to the human eye … but not to certain sensors
• Caused by the vibration and rotation of atoms and molecules
• Emitted from all objects with a temperature above 0 K (-273 °C)
• Interacts like other electromagnetic radiation, including:

5. Reference temps:
White hot steel ~1200 °C
Melting point of aluminum 660 °C
Water boils at 100 °C
Uncooled camera at 38 °C
Human body at 37 °C, radiates at ~ 10 μm
Water freezes at 0 °C
IR Energy vs. Object Temperature

6. Measuring Temperatures
• Emissivity: ratio of actually emitted energy to energy radiated by a black body
at same temperature
– Black body by definition ɛ = 1
– In general the duller and blacker, the closer to ɛ = 1
– The more reflective, the less emissive
• Knowing emissivity permits absolute temperature measurement

7. Allied Vision Technologies GmbH
Taschenweg 2a
07646 Stadtroda, Germany
Tel.: +49 36428 / 677-0
Fax: +49 36428 / 677-24
info@alliedvisiontec.com
www.alliedvisiontec.com
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