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Blog #006 – Your THERMOGRAPHY COMFORT LEVEL – Why can’t my infrared camera see through glass?

Have you ever asked the question “Why can’t my infrared camera see through glass”?  First of all, let’s appreciate that IR cameras do not “see through” things.  The detectors in thermal imaging cameras “receive” energy waves that come from the surface of objects.  Some infrared energy waves travel through glass and some do not.  For example, energy waves in the 2-5 micron wave length can travel through or transmit through glass.  Energy waves in the 7-14 micron wave length do not transmit through glass.  Most of the IR cameras being sold in the market today to water damage restoration technicians or home inspectors or energy auditors operate in the approximate bandwidth of 7-14 microns.  So, they are not able to detect energy waves coming through glass.  The Fluke TiS, TiR, TiR1, TiR32, Ti32, TiR3, TiR4, Ti50, Ti55 are all examples of IR cameras that operate in the approximate bandwidth of 7-14 microns. What the advantage of that bandwidth?  It’s an optimal bandwidth for transmission of infrared energy waves in earth’s atmosphere.  Notice the lack of IR transmission in the 2nd image below.

Our eyes can see through glass

Our eyes can see through glass

Our infrared camera does not see through glass
Our infrared camera does not see through glass

 

However, infrared energy waves DO transmit through thin plastic.  Notice the IR transmission in the 2nd image below.

Our eyes can not see through this dark plastic bag

Our eyes can not see through this dark plastic bag

Infrared radiation as seen by the Fluke IR camera

Infrared radiation as seen by the Fluke IR camera

These images were taken with the Fluke IR Fusion camera which captures both the visible ligh and infrared images at the same time.

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How’s your comfort level in thermography?
(The above comments represent my opinion).

Rod Hoff / Restoration Consultants Inc
Thermography Instructor / IR camera sales
3284 Ramos Circle, Sacramento CA 95827
toll free 888-617-3266 ext 301
fax 916-736-1134
rhoff@restcon.com

Provider of Fluke TiS, TiR, TiR1, Ti, Ti25, TiR27, Ti27, TiR29, Ti29, TiR32, Ti32, TiR3, and TiR4 infrared cameras.

See DEMO www.moistureview.com/demo.html

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About infrarod

Rod Hoff is a Thermographer and instructor with Restoration Consultants, Inc. He teaches a two-day IR class in moisture and building envelope investigations. A graduate from Florida State University, with a degree in education, he received his formal training in Thermography from Snell Infrared and Restoration Consultants, Inc.
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