Can You Calculate Radiance from Irradiance Outputs Using a Spectroradiometer?

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SUMMARY

You can calculate radiance from irradiance outputs using a spectroradiometer, but it requires specific measurements of the angle (cosθ) and solid angle (Ω) in the radiance formula. The discussion indicates that while some participants express skepticism, the consensus is that it is indeed possible with the right approach. For accurate calculations, understanding the geometry of measurement is crucial.

PREREQUISITES
  • Understanding of spectroradiometry
  • Knowledge of radiance and irradiance concepts
  • Familiarity with angular measurements in photometry
  • Basic grasp of solid angles and their calculations
NEXT STEPS
  • Research the formula for calculating radiance from irradiance
  • Learn about angular measurement techniques in photometry
  • Explore solid angle calculations and their applications
  • Investigate the specifications and capabilities of various spectroradiometers
USEFUL FOR

This discussion is beneficial for optical engineers, environmental scientists, and anyone involved in photometric measurements and analysis using spectroradiometers.

nejidoreb
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Hi,

When you measure irradiance using a spectroradiometer, can you calculate radiance based on the irradiance outputs? How does one measure the angle in cosθ and solid angle Ω in the radiance formula?

Thanks!
 
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nejidoreb said:
Hi,

When you measure irradiance using a spectroradiometer, can you calculate radiance based on the irradiance outputs?
No , I don't think so...

How does one measure the angle in cosθ and solid angle Ω in the radiance formula?

Thanks!

Yes , you can. Just google it... There is a very wide explanation over there.
 

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