abhishek singh wrote:
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hi paul.

clear Glass cylindrical tubes with path lenght of 1 cms.

if this white LED emmits all the visible spectrum. it can be used by compecting the design(decreasing the whole path length traveled by light thus the decay of light).

abhishek

Abhishek,

I cannot tell if you are being sarcastic about the spectrum of a white LED or not. Just in case you are not, white LED's do not emit a continous spectrum. Many white LED's are actually a blue LED with phosphors on the die. I believe they use a phosphor that converts blue to yellow, and maybe another phosphor. This results in a cool white light (according to the human eye) that is composed of primarily blue and yellow wavelengths. Good enough for us humans, but perhaps not good enough for your device.

BTW, I assume 1 cms is 1 cm? Misspelled units are far more difficult to read than misspelled words (as our friend Raghu has recently learned)!

- Lee