Irradiance Measurements

Irradiance (E_e) refers to the radiant power (Φ_e) per unit area reaching a surface A from one or more sources of optical radiation. It is measured in W/m² or in W/cm². When the incident optical radiation is not parallel to the detector, which in practice is normal, a cosine diffuser must be used to correct the angular response for accurate irradiance measurement.

E_e = dΦ_e/dA  

   

More information about irradiance measurements can be found under:

Products section: Irradiance Light Detectors Multi-Channel Illuminance / Irradiance Light Detectors Possible Optometers: P-9710, X1₁, X9₁, ... Tutorials: click Basic Radiometric Quantities or Measurement of Irradiance    

---

Contact Form