b2aeae4c   
   From: into@oblivion.nothing.com   
      
   Bullwinkle  wrote in news:9e285053-84d3-48d2-a123-   
   da67fe9f0a59@g28g2000yqa.googlegroups.com:   
      
   > HI,   
   > i have a question about this datasheet:   
   >   
   > http://www.roithner-laser.com/previous/All_Datasheets/LEDs/ELJ-810-228B.pdf   
   >   
   > i don't understand why radiant intensity (1.2W/sr) is greater than   
   > radiant power (250mW): how can be possible?   
   > Thanks   
      
   One is measuring total radiated power. The other is measuring power   
   per unit angle.   
      
   It's similar to power per unit area, like when a 5 mW HeNe is focused   
   down to a spot with an area of 1mm square gives a power density of   
   500mW per square centimeter.   
      
   Brian   
   --   
   http://www.skywise711.com - Lasers, Seismology, Astronomy, Skepticism   
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