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Does anyone know how MCD is calculated?
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11
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Re: Does anyone know how MCD is calculated?
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by richhagen (
richhagen (a t) Juno.com
) on Wed Jul 6th, 2005 at 04:57:33 PM MST
(
User Info
)
The Candella is a measurement of the intensity of light at a given point. A 15 degree radiation pattern LED that is giving off a certain amount of total light as measured in Lumens (The unit of luminous flux in the International System, equal to the amount of light given out through a solid angle by a source of one candela intensity radiating equally in all directions) would have a higher MCD rating than an LED with a 60 degree pattern with the same Lumen rating. Lumens is total light, Candella is intensity. Very rarely however do you see a lumen rating for LED's advertised. A rough comparison for the total light given off can be inferred from the definition of a lumen by comparing the fraction of a sphere that would be illuminated with the source in the center for each distribution pattern and multiplying by the intensity of the light for each case. Of course, depending upon the application, the distribution pattern may make a huge practical difference between the particular LED's. Rich
'A Joule saved is a Joule made'
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Does anyone know how MCD is calculated?
|
11
comments (11 topical, 0 editorial)
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