Welcome to the NEW Infrared Training Forum. To view the old message board, please click here.World Class Infrared Training for Thermography Professionals


Post Reply 
 
Thread Rating:
  • 0 Votes - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
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?
Find all posts by this user
Quote this message in a reply
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.
Find all posts by this user
Quote this message in a reply
Post Reply 


Forum Jump:


User(s) browsing this thread: 1 Guest(s)
Copyright © 1999-2012 FLIR Systems, Inc.