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Old 31st Dec 2006, 8:07 pm   #7
Join Date: Feb 2005
Location: Sedgeberrow, Worcestershire. UK.
Posts: 1,620
Default Re: Colour mixing in mechanical television

I've just had a look at a random couple of LEDs, one a 3mm standard and one a 5mm super-bright, ground them down and lit them up...

It wasn't possible to make precision measurements so these are approximate. Each LED looked like it had a 0.3mm (12 mil) central emitting surface, surrounded by a 1.2mm (47 mil) reflector for the smaller LED and a 1.5mm (59 mil) reflector for the larger.

If you could get in really close to the emitting surface (for the sake of the emitting angle) then screen out the concentric reflector with black paint, might this not work - giving a 12 mil light source ?

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