new UV leds at mouser

9 posts / 0 new
Last post
cat eyes
cat eyes's picture
Offline
Last seen: 7 years 9 months ago
Joined: 02/06/2013 - 18:36
Posts: 22
Location: એટલાન્ટા, ગા
new UV leds at mouser

http://www.mouser.com/new/Philips-Lumileds/philips-lumileds-luxeon-uv/?u...

i don’t know anything about these…
but here they are

Edited by: cat eyes on 11/22/2013 - 18:34
djozz
djozz's picture
Offline
Last seen: 3 hours 5 min ago
Joined: 09/07/2012 - 17:04
Posts: 18000
Location: Amsterdam

cat eyes wrote:
http://www.mouser.com/new/Philips-Lumileds/philips-lumileds-luxeon-uv/?u...

I saw them announced on the Lumileds site last week, nice!  It is pity though that there isn't one below 380nm.

Alje
Offline
Last seen: 7 years 9 months ago
Joined: 11/15/2013 - 13:38
Posts: 4

I can’t bring myself to order from Mouser as the minimum they want for shipping is $12, I was going to order some Carlco optics and the shipping would have been more than the goods.

allan d
Offline
Last seen: 2 months 6 days ago
Joined: 09/01/2012 - 00:15
Posts: 338
Location: SW Florida & SoCal
djozz wrote:
It is pity though that there isn’t one below 380nm.

+1

I would like to find a source for 365 nm LEDs.

Allan

led4power
led4power's picture
Offline
Last seen: 3 hours 8 min ago
Joined: 12/29/2012 - 09:48
Posts: 1331
Location: Croatia,EU

One interesting thing about these leds is “negative drop”,they give more than 200% of light at 200% of current->efficiency is higher at higher current (look at the graph for 500mA vs. 1000mA fro 385 and 395nm), which is really weird.

djozz
djozz's picture
Offline
Last seen: 3 hours 5 min ago
Joined: 09/07/2012 - 17:04
Posts: 18000
Location: Amsterdam

cat eyes wrote:
led4power wrote:
One interesting thing about these leds is "negative drop",they give more than 200% of light at 200% of current->efficiency is higher at higher current (look at the graph for 500mA vs. 1000mA fro 385 and 395nm), which is really weird.
do UV lights have a phosphor ?? and if not, can a phosphor be applied ?? and perhaps put out a lot of light... and maybe use a UV filter..... i realize this sounds odd.... just putting it out there....

Uvleds do not have a phosfor, and you can indeed add that to make visible light, there is even something to be said for that because you can produce a visible spectrum without the 500nm dip, so even closer to incandescent (or sun) spectra. But uv-leds are still so much more inefficient than blue leds (that are used with phosfors to make white leds) that the small advantage of filling the 500nm gap just doesn't pay off (I do expect a uv-led based high CRI led enter the market one day though).

led4power
led4power's picture
Offline
Last seen: 3 hours 8 min ago
Joined: 12/29/2012 - 09:48
Posts: 1331
Location: Croatia,EU
djozz wrote:
Uvleds do not have a phosfor, and you can indeed add that to make visible light, there is even something to be said for that because you can produce a visible spectrum without the 500nm dip, so even closer to incandescent (or sun) spectra. But uv-leds are still so much more inefficient than blue leds (that are used with phosfors to make white leds) that the small advantage of filling the 500nm gap just doesn’t pay off (I do expect a uv-led based high CRI led enter the market one day though).

45% efficiency for 405-410nm isn’t that bad at all,considering this is 1mm^2 chip and undomed. So this is very close to royal blue.
But did you see the price of those uv’s?

djozz
djozz's picture
Offline
Last seen: 3 hours 5 min ago
Joined: 09/07/2012 - 17:04
Posts: 18000
Location: Amsterdam

led4power wrote:
djozz wrote:
Uvleds do not have a phosfor, and you can indeed add that to make visible light, there is even something to be said for that because you can produce a visible spectrum without the 500nm dip, so even closer to incandescent (or sun) spectra. But uv-leds are still so much more inefficient than blue leds (that are used with phosfors to make white leds) that the small advantage of filling the 500nm gap just doesn't pay off (I do expect a uv-led based high CRI led enter the market one day though).

 

45% efficiency for 405-410nm isn't that bad at all,considering this is *1mm^2* chip and *undomed*. So this is very close to royal blue. But did you see the price of those uv's?

Oh yes, I did Cry . I had a mouser order recently, and would have included one to play with if they were not more than 20 dollars a piece. So yes,  I see now that production costs may be more of a reason that those leds are not there than efficiency alone.

Mattaus
Mattaus's picture
Offline
Last seen: 8 months 2 days ago
Joined: 10/20/2012 - 23:51
Posts: 833
Location: Brisbane, Australia

Damnit! Minimum shipping is $36 for me and I just ordered a whole heap of stuff from them. If I ahd seen this earlier I would have grabbed one* Sad

-Matt

*and only one - check out the price!