Realization of an infrared spectroradiometer

Area of Science:

• Optical Engineering
• Metrology
• Spectroscopy

Background:

• Accurate measurement of spectral irradiance is crucial for various scientific and industrial applications.
• Existing methods may have limitations in automation, spectral range, or uncertainty.
• The 800-2400 nm spectral range is important for applications like infrared sensing and material characterization.

Purpose of the Study:

• To develop and describe a fully automatic spectroradiometer.
• To measure the absolute spectral irradiance of light sources.
• To achieve high accuracy in the 800-2400 nm spectral range.

Main Methods:

• Design of a fully automatic spectroradiometer.
• Direct comparison method using a standard radiation source.
• Placement of test and standard sources at the same distance for measurement.

Main Results:

• The spectroradiometer operates automatically within the 800-2400 nm spectral range.
• The comparison process yields an estimated uncertainty of less than 1%.
• Absolute spectral irradiance values are obtained with an accuracy better than 3%.

Conclusions:

• The developed automatic spectroradiometer provides accurate measurements of absolute spectral irradiance.
• The instrument's low uncertainty (<1% comparison, <3% total) makes it suitable for demanding applications.
• This technology advances precise light source characterization in the near-infrared spectrum.