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SequenceDeviceEmissivityTable
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Rich Barton

Description

There are several ways to create an emissivity table to compensate for varying emissivity across a device surface while powering the device. The benefits of using an image sequence include the following:

  • Creating an emissivity table after the image sequence has be recorded (post processing)
  • Applying the emissivity table in immediately after creation to minimize shifting due to target movement

Note: The device and camera cannot be moved after creating an emissivity table however it may be possible to compensate for slight movement using the xy stage to reposition the device.


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Rich Barton
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  1. If surface emissivity is < 0.30, coat the device with emissivity coating.
  2. Place the device on the thermal stage with a thermal pad between the stage and device to maximize heat transfer.
  3. Heat the stage to 50°C and allow the device temperature to stabilize.
  4. Enable image averaging if steady state measurements are adequate to decrease image noise.
  5. Set the Image Sequence Record Rate to 1 fps.
  6. Start recording an image sequence, wait a few seconds, and then apply power to the device.
  7. Allow the device temperature to settle and then remove power.
  8. Stop capturing images (which will stop image sequence recording).
  9. Scroll to the sequence image immediately before power was applied (before the device heat up).
  10. Open the Emissivity Settings window. If the lens working distance is less than approximately 40mm, check Use Camera Temp. If greater than 40mm, uncheck Use Camera Temp and set the Background Temperature to the ambient room temperature.
  11. Open the Emissivity Table window and create a Single Point emissivity table.
  12. Apply the table and then scroll through the test sequence images.
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