Blue LED with no emission beyond 480 nm

[Steve]

I'm seeking an LED with no emission beyond (longer than) 480 nm.
It's best if it was eye-safe so as little UV emission as possible is
desired (> 400 nm ?). The few blue led's I've come across with peak
or dominant wavelengths of 430 nm have very wide spectra extending
beyond 480 nm.

 

[Bobby]

I'm seeking an LED with no emission beyond (longer than) 480 nm.
It's best if it was eye-safe so as little UV emission as possible is
desired (> 400 nm ?). The few blue led's I've come across with peak
or dominant wavelengths of 430 nm have very wide spectra extending
beyond 480 nm.

Construct a cct that will turn the LED off when a freq > 480nm is reached

 

[neon]

"Steve" <[email protected]> wrote in message
news:[email protected]...
> I'm seeking an LED with no emission beyond (longer than) 480 nm.
> It's best if it was eye-safe so as little UV emission as possible is
> desired (> 400 nm ?). The few blue led's I've come across with peak
> or dominant wavelengths of 430 nm have very wide spectra extending
> beyond 480 nm.
>

Construct a cct that will turn the LED off when a freq > 480nm is reached

NOW you see that is good advice follow it.

 

[neon]

BLUE IS THE SPECTRUM THAT THE LED IS MADE FOR. that is ultraviolet from then on.FIRST COME INFRARED THEN ULTRAVIOLET. HAVE EVER HEARD OF FILTERS FOR THE EYES I DID.

 

[Arnold]

Construct a cct that will turn the LED off when a freq > 480nm is reached

May be you could use ordinary glass as a filter: it partially blocks
UVA (wavelength 400 and 300 nm) and totally blocks UVC and UVB
(wavelengths shorter than 300 nm) due to the addition of compounds
such as sodium carbonate (see wikipedia). Or other UV-filters that
completely block UVA.