Directional radiant power is known as radiant intensity and is measured in watts per steradian (W/sr). Radiant intensity is often used to determine the efficiency of lensed sources such as automotive headlights and warning beacons which emit a parallel beam. Detectors with a defined field of view at a fixed distance and satisfying point source conditions are used to measure intensity.

More information about radiant intensity measurements can be found under:

 Products section: Radiant Intensity Detectors
                           Possible Optometer: P-9710

 Tutorials: click Basic Radiometric Quantities or Measurement of Radiant intensity  

 Download: Light_Detectors.pdf (1.2 MB)

 Or contact us to discuss your application