SpectralEmissivity & Emittance

| Useful Data | Practices Measuring or Avoiding | Background & Theory|

Improving Temperature Measurement of Low Emissivity Targets

Helpful Tips for Users From FLIR

fliratspr118-imageMeer, Belgium — FLIR Systems has published a new technical note that investigates and describes how to use low-cost materials to increase target emissivity to enable accurate measurement using a thermal imaging camera.

Clean, unoxidized, bare metal surfaces such as are found in many R&D applications have low emissivity. Consequently they are difficult to analyse with a thermal imaging camera.

To get good accurate temperature measurements there is a consequent need to increase the emissivity of these problematic targets.

The technical note provides an informative introduction to emissivity and how a target’s emissivity, reflectance and thermal conductivity values are highly dependent on material properties.Read More

Thermal Infrared Spectral Laboratory and Mineral Library at ASU

ASU Thermal Emission Spectral Library
The TES instrument team maintains a Thermal Infrared Spectral Laboratory and Mineral Library at Arizona State University in Tempe, Arizona, USA.

The library includes observations of terrestrial rock and mineral samples for comparison with the spectra of Mars returned by TES and also for interpreting remote sensing data collected with Earth as the target.

The links below lead to detailed information about the ASU facility and the contents of the Spectral Library.Read More

Reflectivity of Mineral Powders

From the Website of Ocean Optics, an applications note for their Jaz Spectrometer

 Figure-3-Experiment-Setup.jpgIt begins:

“Reflectance spectroscopy is a versatile technique than can be used to identify and characterize a range of powdered samples including mineral powders, grains in lunar samples, mining samples, natural deposits, soils and sediment core samples. In this application note, reflectance spectroscopy is used to characterize mineral powder samples.

The Jaz spectrometer was used to acquire reflectance spectra for pure samples and powder mixtures to assess the power of reflectance spectroscopy to characterize mineral powder samples.”

Figure-3-Experiment-Setup.jpg from the Ocean Optics Blog

Read More