Re: UV LED
From: James Sweet (jamessweet_at_hotmail.com)
Date: 08/22/04
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Date: Sun, 22 Aug 2004 02:21:44 GMT
"Bob Urz" <sound@inetnebr.com> wrote in message
news:4126053d_5@corp.newsgroups.com...
>
>
> Jerry G. wrote:
> > The UV frequency used for your application is 365 nm. You will have a
> > difficult time to have a UV LED powerful enough to be practical for
> > automotive leakage inspection. You would have to invest in the proper
lamp
> > unit for this. If you are to use this in an environment where the
ambient
> > light is not too bright, you can get away with an 8 Watt or so UV tube
type
> > lamp. If you are going to use this in a brightly lit environment, you
would
> > be best to get an inspection lamp of upwards of 50 Watts. These lamps
have
> > the proper band filter built in, to make sure that the proper wavelength
for
> > your application is leaving the lamp unit.
> >
> > When using industrial UV lamps, even in the low UV spectrum, it is
strongly
> > suggested to use the proper UV protection eyewear. Standard specials
with a
> > UV rating are not good enough for these types of high intensity UV
lamps.
> > There would be also too much side light getting through. The proper UV
> > goggles cover the eye area in a manner that there is no UV leakage to
the
> > eyes at all.
> >
> > http://uvp.com/new/index.php?module=ContentExpress&func=display&ceid=111
> >
> Well, the one i saw in the autoparts store used two AAA batteries and
> had a SINGLE LED in the end. Like a small mag light only with a UV led.
> If it was usable, i should be able to duplicate it. Finding the UV
> LED's through normal replacement part sources is a little tougher. MCM
> did not have them listed in there catalog.
> There are some specialty places that sell them.
>
> My kids have a incandescent bulb black light i might try to see if it
> works.
>
> Bob
>
I've had blue LED's from Radio Shack that put out enough UV to fluoresce
dyes.
Those incandescent blacklights are just about worthless, find a small
fluorescent one, either one of the screw in compact fluorescent types or a
small linear one, often you can get them at novelty shops and a big place
like Wal Mart (as much as I hate to support them) would probably have
something.
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