You are correct of course, and at the 1A per led that you will be able to run the triple direct drive on a single cell, the lifetime expectancy should be good.
The output should still be impressive though, at more than 3W radiation OTF.
Whoa professor Djozz. That’s a great DIY way to measure the UV. Salute! I thank you for doing this. I can imagine the joy you had doing it.
As for the 233B. Yes that’s just samples I got for PCB footprint testing. Please ignore the output.
- Clemence
Correct :party: , designing test methods is way more fun than continuing doing tests on new leds once the method is settled, but I will try to measure a new UV led every now and then.
But is there a triple optic that will work with UV?
I got information Simon is using a LG UV LED in next Convoy UV batches, as the SST-10 UV 365nm are more expensive at same performance
it is listed with 1360mW@0.7A
and drive current on the G1performance group is 700mA und the H1 1500mA max. he got the one that’s only 0.7A, but I think it will run fine at 1.5A
https://www.lasercomponents.com/fileadmin/user_upload/home/Datasheets/lg/lg_uv_led_overview.pdf
^ Cool! I have been trying to find that led for sale for 2 years now, but I can’t find it in small quantities with normal shipping costs. I even emailed lasercomponents.com because they are distributor of LG UV leds, but had no luck getting samples from them.
ask Simon from Convoy for a test sample
Good idea!
No need, he already lists the led for sale. But his picture is an older generation of LG UV-leds than I thought it would be. Still cool to test but not the latest and greatest.
At least he has 2. best flux bin and 3. lowest voltage bin
960-1060mW @500mA is impressive
Djozz, this is a great thread! I applaud your efforts to find a repeatable measurement method. :+1:
Simon asked me for your shipping address to send you a free smaple djozz
this host with triple UV led and a DD driver will outperforming many high-end UV flashlight, i guess
Yes, could be a perfect combination, but the large diameter filter glass (ZWB2) is difficult to purchase.
Nice work, djozz. Would you care to update this thread by testing the LG UV-A 365 nm? I’d like to see it fare against the 365 nm UV LEDs in your test. I’m sure it will not top the Luminus SST-10, but I think it will beat the two Nichias. I’m not sure about the LiteON. I have the LG UV-A and I’m using it. The visible stray light of the LG is tolerable, maybe not as bad as the LiteON. I’m curious to see if getting the SST-10 is worth the extra price.
I have one of those LG leds in house to test but I’m waiting for the Seoel Semiconductors version from Kaidomain that is stuck in the mail somewhere, to do a test of both.
Yes, the one from Seoel Viosys, too. The CUN66A1A. I’m curious to see both of them in your test.
The SST-10 has no white wastelight and pretty few violett visible light, so an UV filter is not really nessesary
Have you considered using a diffraction grating to measure the output at a desired wavelength? All you would need is a slit at the calculated angle, and your detector behind it. You wouldn’t need all that filter stuff.
We’ll I am sure djozz will chime in but in order to do this your detector has to be sensitive to UV wavelengths and these are quite expensive. Djozz elegant solution is to convert the UV to visible wavelengths using the uranium glass so he can use regular inexpensive light meters to measure the intensity.