I have an application with LEDs with following data sheet
- LED631E 635 nm
- optical power 4 mW
- half angle 20°
- FWHMa 10 nm,
Could you help me with calculation of beam area at the distance of 20 mm from LED?
Also please help me with calculation of dosage (J/cm2) and total energy delivered [Joules] in 20 minutes at the same distance : 20 mm from LED.
Thank you a lot.