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Mirrors for thermal imaging
05-28-2013, 07:08 PM
Post: #1
Mirrors for thermal imaging
Hello,

I need to image an inaccessible area at about 100C-200C for purposes of temperature uniformity mapping. The geometry is such that I'll need a 45 degree mirror to see the target area. I'm using a FLIR i7 for this. The mirror will get warm in the process. Does anyone have an idea what to use for such a mirror, considering the 7-13 micron wavelength range involved? I'm more interested in spot-to-spot temperature differences rather than accurate absolute temperature. Thanks, all!
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05-29-2013, 08:50 AM
Post: #2
RE: Mirrors for thermal imaging
(05-28-2013 07:08 PM)dpocius Wrote:  Hello,

I need to image an inaccessible area at about 100C-200C for purposes of temperature uniformity mapping. The geometry is such that I'll need a 45 degree mirror to see the target area. I'm using a FLIR i7 for this. The mirror will get warm in the process. Does anyone have an idea what to use for such a mirror, considering the 7-13 micron wavelength range involved? I'm more interested in spot-to-spot temperature differences rather than accurate absolute temperature. Thanks, all!



Any polished metal will do, aluminium works well, but if you need temperature you will need to measure reflectivity correctly and compensate for it. The i7 will not really allow the compensation in the camera, but you may be able to do it in the software.

Please do not make the mistake of thinking that just because you are only interested in differences that you don't to worry about entering all the values correctly. If you enter incorrect values, or do not compensate correctly it will affect the temperature difference measured too. Your mistake will be different on each component measured.
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05-29-2013, 09:28 AM
Post: #3
RE: Mirrors for thermal imaging
I agree with Bob.
I see that you are in the US. You can use this:
Item 8202K11 - Corrosion-Resistant Aluminum (Alloy 5052), #8 Mirror Finish, .032" Thick, 12" X 12"
from McMaster Carr with good results.
Jack

Jack M. Kleinfeld, P.E.
Kleinfeld Technical Services, Inc.
Infrared Thermography, Finite Element Analysis, Process Engineering


Bronx, NY 10463


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Jack Kleinfeld, P.E.
Kleinfeld Technical Services, Inc.
1-718-884-6644
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06-26-2013, 04:40 PM
Post: #4
ITC RE: Mirrors for thermal imaging
Consider using a stainless steel signal or camping mirror. Very low cost, durable, high performance, and readily available.
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