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Thermal Imaging, Infrared Cameras & Energy Audits Contains discussions about thermal imaging, infrared cameras, energy audits, and more.

 
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  #1  
Old 1/28/12, 7:33 PM
Charley L. Bottger's Avatar
Charley L. Bottger Charley L. Bottger is offline
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Default We understand IR reflections

Or do we this image was taken standing smack in front of this set of windows and had no reflection the next window to the left has the standard reflection as one would expect staring straight into the glass with the camera.
Both images were taken at the same angle why does one have a reflection and one does not. The answer to this was never mentioned in any class that I have taken, field tested only
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we-understand-ir-reflections-147-whitworth-pc-1-28-12-128.jpg   we-understand-ir-reflections-147-whitworth-pc-1-28-12-130.jpg   we-understand-ir-reflections-147-whitworth-pc-1-28-12-132.jpg  



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  #2  
Old 1/28/12, 8:12 PM
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Default Re: We understand IR reflections

Angle of incidence



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  #3  
Old 1/28/12, 8:19 PM
Charley L. Bottger's Avatar
Charley L. Bottger Charley L. Bottger is offline
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Default Re: We understand IR reflections

Quote:
Originally Posted by mlarson View Post
Angle of incidence
Nope



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  #4  
Old 1/28/12, 8:23 PM
Michael Larson's Avatar
Michael Larson Michael Larson is offline
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Default Re: We understand IR reflections

I can see the glass is not parallel to the camera lens.

Why would I expect to see a reflection?



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  #5  
Old 1/28/12, 8:31 PM
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Charley L. Bottger Charley L. Bottger is offline
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Default Re: We understand IR reflections

Quote:
Originally Posted by mlarson View Post
I can see the glass is not parallel to the camera lens.

Why would I expect to see a reflection?
Lets wait until Chuck, Bill or Dave comes along



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  #6  
Old 1/28/12, 9:30 PM
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William Warner William Warner is offline
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Default Re: We understand IR reflections

winder's are installed backerds

and are you flipping us the bird?




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  #7  
Old 1/28/12, 9:35 PM
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Roy D. Cooke, Sr Roy D. Cooke, Sr is offline
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Default Re: We understand IR reflections

Quote:
Originally Posted by wwarner View Post
winder's are installed backerds

and are you flipping us the bird?
Good catch I did not see that ... Thanks... Roy
I did see the chimney is on an angle .



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  #8  
Old 1/28/12, 9:48 PM
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Default Re: We understand IR reflections

Quote:
and are you flipping us the bird?
y'all ain't from around here
that's the okie peace sign



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  #9  
Old 1/28/12, 11:00 PM
Charley L. Bottger's Avatar
Charley L. Bottger Charley L. Bottger is offline
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Default Re: We understand IR reflections

Quote:
Originally Posted by wwarner View Post

and are you flipping us the bird?
Ya noticed did ya, and no the winders are not backards



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  #10  
Old 1/29/12, 12:34 AM
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Default Re: We understand IR reflections

Plexiglass (e=.86) or possibly plastic film applied to interior

So what is the reflectivity?



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Last edited by cevans; 1/29/12 at 12:51 AM..
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  #11  
Old 1/29/12, 7:56 AM
Charley L. Bottger's Avatar
Charley L. Bottger Charley L. Bottger is offline
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Default Re: We understand IR reflections

Quote:
Originally Posted by cevans View Post
Plexiglass (e=.86) or possibly plastic film applied to interior

So what is the reflectivity?
At least you were thinking something beside angle and yes there was a tint film applied on the inside and a canvas type see through curtain similar to a car wrap on the exterior here is a digital of the exterior
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  #12  
Old 1/29/12, 11:06 AM
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David A. Andersen David A. Andersen is offline
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Default Re: We understand IR reflections

Good call Chuck.

If there is no reflection, the subject is not reflective!

Just because there is glass in there does not mean it will reflect.

Kirchhoff's Law of Thermal Radiation:
a+p+t=1

If there is no reflection, p = 0. As we know glass has a high "p", there must be something in the way.

I posted a similar issue here a while back where the windows in a sky-rise were put in backwards.




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