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Sensor's emissivity with filter
03-15-2014, 03:21 PM
Post: #1
Sensor's emissivity with filter
Greetings to everyone,

I have an mlx90614 infrared temperature sensor and I want to use it with a germanium filter. In http://www.melexis.com/Asset/Changing-em...-5813.aspx it explains how to change the sensor's emissivity when it is used with a filter. If the object's emissivity is not 1 and is, for example 0.8, then what emissivity should I put into the sensor?
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03-17-2014, 09:09 AM (This post was last modified: 03-17-2014 09:10 AM by Gary Orlove.)
Post: #2
RE: Sensor's emissivity with filter
Measure the emissivity of your target using the procedure as referenced.

Measure the transmission of the window using the procedure as referenced.

Calculate an "effective emissivity" of the target with window = target e * window t

Use this "effective emissivity" for your temperature measurements. This will only be valid if the window has the same temperature as the ambient reflection.
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