Physics Asked by Shanks K on March 26, 2021
Is there a relationship between Ir-radiance of an LED and the forward current supplied to it? I am designing a photo-therapy device for neonatal jaundice treatment. The required quantity is Ir-radiance. However, I’m unable to measure it in our college because of non-availability of a radiometer. So I was wondering if there is a relationship between these two. Then I can supply the required current to the LED to get the desired irradiance.
I would expect they are proportional, but I haven't checked. If each electron creates a photon, the number of photons per second is proportional to the number of electrons per second.
Irradiance is flux of radiant energy per unit surface area normal to the energy flow. Neither area of the diode nor angle of emmission changes.
Answered by mmesser314 on March 26, 2021
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