22 Feb
2010
22 Feb
'10
7:25 p.m.
On Feb 22, 2010, at 10:20 PM, Randy Dawson wrote:
If you look at one in the microscope, it looks like an
LED with
some sort of phosphor painted over the semiconductor. Is that how
these things work, its really a high efficency IR LED, with a
phosphor doubler to bring the wavelength into visible? Just
speculating...
No, they're coated with a blend of phosphors designed to give
"sorta" white light. The native LED underneath the phosphor coating
is usually blue.
Remember, if you double the narrow-band output of some common IR
LED output, you'll get some narrow-band visible output...more or less
a single visible color.
-Dave
--
Dave McGuire
Port Charlotte, FL