Ultraviolet Emitters

58 posts / 0 new
Last post

Pages

Mr. Nobody
Mr. Nobody's picture
Offline
Last seen: 1 year 5 months ago
Joined: 12/17/2014 - 22:46
Posts: 582
Location: Simi valley CA
Ultraviolet Emitters

I built a nice true 365nm light today and decided i would compare it to the Solarforce p60 UV.

 

365nm

 

Solarforce 410nm? UV

 

365nm

 

Solarforce 410nm? UV

 

Here's the Solarforce P60 UV drop in:

 

So after trying out the Two the 365nm emitter seems to be the better choice on certain items where as the solarforce drop in just spills blue light everywhere. Things seem to be a little more fluorescent (Brighter to the eye) with the solarforce UV over the 365nm wavelength.

It's strange how the 365nm has that white/clear hotspot but when it hits white paper it is blue, when it hits skin or other things like hair it shows the NORMAL color of the item it sits on.

Both have there pros and cons. So It would be great to find the same Solarforce emitter on a 16mm star so I can install it in a smaller host.

 

Any one here know where i can get something lower in the wavelength on a 16mm star say...265nm ?

Edited by: Mr. Nobody on 06/09/2015 - 00:31
Ronin42
Ronin42's picture
Offline
Last seen: 1 day 17 hours ago
Joined: 12/17/2014 - 22:17
Posts: 1627
Location: Alameda, CA

“265 nm uv led”

You might need to reflow it.

(“It’s good that most people can’t remember their previous lives. Otherwise
things would be a lot more complicated than they already are.”
Ajaan Lee Dhammadharo)

alpg88
Offline
Last seen: 1 week 3 days ago
Joined: 10/11/2013 - 12:35
Posts: 517
Location: usa

lol 265nm is in germicidal range, something you do not want to look at or even be exposed to. it is uvc, it may give you cancer quite fast, and leave you blind.

not to mention they are pretty expensive, some run up to $6000 for 1 pc.

Halo...
Halo...'s picture
Offline
Last seen: 1 year 3 months ago
Joined: 12/15/2011 - 02:39
Posts: 3304
Location: Halo island

Nichia has 365nm LEDs that don’t emit any white light but they are expensive.
Most paper glows blue because they add a fluorescent dye to make it look brighter white. A similar dye is found in most laundry detergents, labelled as a “whitening agent”. That’s why there are laundry detergents “for dark colors”, they just lack any fluorescent dyes. wikipedia.org/wiki/Optical_brightener

ahirshy
Offline
Last seen: 1 year 3 weeks ago
Joined: 03/07/2015 - 17:07
Posts: 268
Location: London

I too am also looking for a UV capable light. Preferably requiring no immediate modification, so capable from stock.

I happen across the “RoMiSen RC-3114” whilst looking through TinyWind’s EDC selection.
http://www.tinywind.com/romisen-3114-cree-mode-lumens-18650-flashlight-s...

Currently out-of-stock, but available on eBay and AliExpress:
http://www.aliexpress.com/item/Multifunctional-RoMiSen-RC-3114-CREE-Q5-L...

Looks like a nice 18650 stainless steel tube-style light. Two emitters in a split reflector. Therefore probably neither give such a great beam profile, but useable and useful if it works.

Cannot tell which emitter is which from the description, but it looks like one is XM-L2 (silver surround and dot in corner) – likely the normal white emitter. Whilst the other would be the UV/Purple emitter.

Does anyone have any other information about this light, particularly the UV emitter and whether it might actually function as expected for a UV light?

Many thanks and keep shining,
Hirshy

jonwkng
jonwkng's picture
Offline
Last seen: 1 year 2 months ago
Joined: 10/08/2013 - 00:44
Posts: 37
Location: Singapore

Hi Mr Nobody,

Nice beamshots! Anyway, there are UV emitters that emit within the UV spectrum (plus a fair bit of blue/violet spectrum visible light. Then, there are also wavelength specific UV emitters that have a peak emission at a particular wavelength. As far as the latter category is concerned, Nichia UV emitters are amongst the best. Most of these emit minimal visible light, as has been mentioned.

Here are a couple of Nichia UV emitters that have been used in flashlights. Not cheap nor easy to source. You will need to reflow.
NCSU033B 365nm
NVSU233A 365nm

Why the big deal with these emitters?
Found this video on YouTube by hugo2x reviewing a nailbender P60 drop-in using the NCSU033B…

:exmark: Please use eye protection at all times when using UV emitters!!!

[EDIT – Added credits for video]

Mr. Nobody
Mr. Nobody's picture
Offline
Last seen: 1 year 5 months ago
Joined: 12/17/2014 - 22:46
Posts: 582
Location: Simi valley CA

who here wants to hook me up with a NVSU233A 365nm flowed onto a noctigon 16mm ?
i want the lower uv cause i like to live dangerously haha

ReManG
Offline
Last seen: 3 days 16 hours ago
Joined: 04/25/2015 - 22:52
Posts: 2537
Location: Between the Mexico's

A triple with all three ranges, you could find every scorpion in range…

ALL of my links are non-affiliated for your pleasure...

My Reviews

Lithium Ion Battery Safety 101

 

You bought yourself some good lights, now  go buy yourself some great pants... Bluffworks

I have no affiliation with Bluffworks, except as a very satisfied customer...

 

 

jonwkng
jonwkng's picture
Offline
Last seen: 1 year 2 months ago
Joined: 10/08/2013 - 00:44
Posts: 37
Location: Singapore
Mr. Nobody wrote:
who here wants to hook me up with a NVSU233A 365nm flowed onto a noctigon 16mm ? i want the lower uv cause i like to live dangerously haha

Well, 365nm is about the lowest you can go with the NVSU233A – other flavors include 385, 395 & 405nm.

And, if you’re going to get someone to reflow for you, why not just buy one of mash.m’s P60?
He’s sold a small number of P60s using the NVSU233A previously.

Living dangerously? To me, that would be the NVSU333A (3.6+W) 365nm. Definitely a skin cancer hazard. And if that doesn’t get you, the heart attack from the price tag probably will. These are after all designed to be run in water-cooled arrays. Shocked

To be fair, the Nichia UV emitters were designed primarily for industrial purposes ,e.g lithography, ink and resin setting, etc. Don’t think their engineers envisioned flashaholics cramming these into flashlights. Smile Which is why they cost so much and why they are so difficult to procure.

Halo...
Halo...'s picture
Offline
Last seen: 1 year 3 months ago
Joined: 12/15/2011 - 02:39
Posts: 3304
Location: Halo island

NVSU333A is a weapon!

jonwkng
jonwkng's picture
Offline
Last seen: 1 year 2 months ago
Joined: 10/08/2013 - 00:44
Posts: 37
Location: Singapore
ReManG wrote:
A triple with all three ranges, you could find every scorpion in range…

Yup, 365nm + 385nm + 405nm NVSU233A sounds like a nice combination for a triple.
Though, offhand, few issues I can imagine :-
1) The price of the 3 emitters alone would be ridiculous
2) Sourcing the emitters – 365nm is available from a tiny number of vendors, but the other wavelengths are not that easy for the end-user to get hold of
3) The emitters have different Vf about 0.3V typical between the two extremes.
The release of magic smoke from said emitters is detrimental – see points 1) and 2)

alpg88
Offline
Last seen: 1 week 3 days ago
Joined: 10/11/2013 - 12:35
Posts: 517
Location: usa

i reflowed 3×3535 365nm on noctigon triple, i paid $20 for 4. i installed them into this light, originaly it was rguv tripple, but after green started flickering, i repleaced g,r,uv tripple with all 3 uv triple. 700ma each.
but you can not use plycabonate tir sich as carclo, you need only pmma tripple from ledil, and window must be pmma too, polycabonate does not let uv below 400nm thru.

L4M4
L4M4's picture
Offline
Last seen: 28 min 22 sec ago
Joined: 12/08/2013 - 13:43
Posts: 1117
Location: Germany

Anybody has tested these ultra-cheap ones yet: http://www.ebay.de/itm/251553516667 ?

I don’t have any purpose for a UV light, so I won’t spend 20$ only for the LED – Will this work or are the nm too high?

Do UV LEDs still have the problem that they age really quickly? I have something in mind, that the light output is only 50% after 1000 hours.

alpg88
Offline
Last seen: 1 week 3 days ago
Joined: 10/11/2013 - 12:35
Posts: 517
Location: usa

L4M4 wrote:
Anybody has tested these ultra-cheap ones yet: http://www.ebay.de/itm/251553516667 ?

I don’t have any purpose for a UV light, so I won’t spend 20$ only for the LED – Will this work or are the nm too high?

Do UV LEDs still have the problem that they age really quickly? I have something in mind, that the light output is only 50% after 1000 hours.

i bought 5 of these, they are ok, they make white paper, price stickers glow. as for lifetime, i did not run any of uv light i build for even 1\10 of that, can not confirm or deny it.

ahirshy
Offline
Last seen: 1 year 3 weeks ago
Joined: 03/07/2015 - 17:07
Posts: 268
Location: London

http://budgetlightforum.com/node/39617#comment-774380

From post 210 onwards there is discussion brewing about a possibility for UV-capable Group-buy of RoMiSen RC-3114 dual-led stainless-steel flashlight.

Does anyone in this thread have any interest or further opinions?

Hirsh

Jubeldum
Jubeldum's picture
Offline
Last seen: 1 year 9 months ago
Joined: 11/02/2014 - 09:20
Posts: 2057
Location: Michigan

I bought one of these on a SinkPad because the price was right. I haven’t gotten around to playing with it yet.

3W 3535 Ultra Violet UV 365nm UV LED

I’ll let someone else beta test this since it is $45. I think it will mount on a XHP70/MKR SinkPad. Who wants to be our Mikey?

Nichia NCSU033B P33d22 UV 365nm LED 540mW Ultra Violet

http://www.nichia.co.jp/specification/products/led/NCSU033B-E.pdf

Picture snagged from Ebay.

Mr. Nobody
Mr. Nobody's picture
Offline
Last seen: 1 year 5 months ago
Joined: 12/17/2014 - 22:46
Posts: 582
Location: Simi valley CA

Jubeldum wrote:
I bought one of these on a SinkPad because the price was right. I haven’t gotten around to playing with it yet.

3W 3535 Ultra Violet UV 365nm UV LED

I’ll let someone else beta test this since it is $45. I think it will mount on a XHP70/MKR SinkPad. Who wants to be our Mikey?

Nichia NCSU033B P33d22 UV 365nm LED 540mW Ultra Violet

Picture snagged from Ebay.
!{width:75%}http://s24.postimg.org/ot7u6fi0l/image.jpg!


can you link us to the nichia mounted on the Sinkpad II From eBay… the one pictured….
Jubeldum
Jubeldum's picture
Offline
Last seen: 1 year 9 months ago
Joined: 11/02/2014 - 09:20
Posts: 2057
Location: Michigan

It’s LCK LED but it is only on the German Ebay. It’s not on the USA Ebay.

http://www.ebay.de/itm/Nichia-NCSU033B-P33d22-UV-Ultra-Violet-365nm-LED-540mW-3W-20mm-Sinkpad-Copper-/221718555640

EDIT:
Also I have noticed that LCK LED and LEDDNA both have the name Law in their PayPal name and both are from Hong Kong. I wonder if Law is a common name in Hong Kong.

Jubeldum
Jubeldum's picture
Offline
Last seen: 1 year 9 months ago
Joined: 11/02/2014 - 09:20
Posts: 2057
Location: Michigan

Let’s compare the XHP70 and Nichia NCSU033B P33d22 footprints.

XHP70

.

Nichia

djozz
djozz's picture
Online
Last seen: 3 min 27 sec ago
Joined: 09/07/2012 - 17:04
Posts: 11202
Location: Amsterdam

It is interesting that it has a footprint that fits one of the Sinkpads, and I'm curious if the output peaks higher and at a higher current like that. Looking forward to your build with it !

It is not the latest generation though, the NVSU333A U365 (mentioned above as well)  has the same footprint but has an output that is more than 6 times higher (3640mW at 3.5A). I would like to see that happen on a Sinkpad as well Smile I think I do not want to know the retail price Sad

pommie
Offline
Last seen: 5 hours 18 min ago
Joined: 08/28/2013 - 03:56
Posts: 881
Location: Corio, Victoria, Australia

I got an Ebay cheap 365nm emitter and when put in a host was disappointed that it had a white light spot in the middle of the beam, so with a uv filter on my camera I took a photo of it while it was on, high f stop, high speed, and noticed that the white plastic centering ring was the only thing I could see, so I took it out, and the white spot disappeared :bigsmile:

Usual disclaimer, worked for me, not guaranteed to work for you Silly

Cheers David

Nothing to see here folks, move along...BLF GT proto

Mr. Nobody
Mr. Nobody's picture
Offline
Last seen: 1 year 5 months ago
Joined: 12/17/2014 - 22:46
Posts: 582
Location: Simi valley CA

pommie wrote:
I got an Ebay cheap 365nm emitter and when put in a host was disappointed that it had a white light spot in the middle of the beam, so with a uv filter on my camera I took a photo of it while it was on, high f stop, high speed, and noticed that the white plastic centering ring was the only thing I could see, so I took it out, and the white spot disappeared :bigsmile:

Usual disclaimer, worked for me, not guaranteed to work for you Silly

Cheers David


HI David, which one did you buy? link us
pommie
Offline
Last seen: 5 hours 18 min ago
Joined: 08/28/2013 - 03:56
Posts: 881
Location: Corio, Victoria, Australia

Sorry, I bought it in January, all gone now, however the seller has a couple of other 365nm led’s mounted on cree type stars.
As usual its pot luck, link to the ebay.au store,

http://stores.ebay.com.au/panpan-supermarket/3w-led-chip-/_i.html?_nkw=u...

Should open with results for ultra violet displayed Party

Cheers David

Nothing to see here folks, move along...BLF GT proto

Jubeldum
Jubeldum's picture
Offline
Last seen: 1 year 9 months ago
Joined: 11/02/2014 - 09:20
Posts: 2057
Location: Michigan

Now this looks like a scam. Right up there with the cheap SkyRay Kings on Ebay.

https://groupgets.com/campaigns/118-nvsu233a-u365-high-power-uv-led

djozz
djozz's picture
Online
Last seen: 3 min 27 sec ago
Joined: 09/07/2012 - 17:04
Posts: 11202
Location: Amsterdam

Jubeldum wrote:
Now this looks like a scam. Right up there with the cheap SkyRay Kings on Ebay. "https://groupgets.com/campaigns/118-nvsu233a-u365-high-power-uv-led":https://groupgets.com/campaigns/118-nvsu233a-u365-high-power-uv-led[/quote]

At least their claim about unavailability through the 'regular distributors' is not true, I can buy it at leds.de for 54 euro's (~$60). I would indeed not trust the $15.50,  but it is tempting....

devman
Offline
Last seen: 1 year 5 months ago
Joined: 04/27/2011 - 06:24
Posts: 825
Location: Hong Kong / Vancouver, Canada

Jubeldum wrote:
It’s LCK LED but it is only on the German Ebay. It’s not on the USA Ebay.

http://www.ebay.de/itm/Nichia-NCSU033B-P33d22-UV-Ultra-Violet-365nm-LED-540mW-3W-20mm-Sinkpad-Copper-/221718555640

EDIT:
Also I have noticed that LCK LED and LEDDNA both have the name Law in their PayPal name and both are from Hong Kong. I wonder if Law is a common name in Hong Kong.

I know a couple people with the last name Law. It’s not as common as Ho or Chan, but it seems pretty common here

Jubeldum
Jubeldum's picture
Offline
Last seen: 1 year 9 months ago
Joined: 11/02/2014 - 09:20
Posts: 2057
Location: Michigan
djozz wrote:

It is interesting that it has a footprint that fits one of the Sinkpads, and I’m curious if the output peaks higher and at a higher current like that. Looking forward to your build with it !

It is not the latest generation though, the NVSU333A U365 (mentioned above as well)  has the same footprint but has an output that is more than 6 times higher (3640mW at 3.5A). I would like to see that happen on a Sinkpad as well Smile I think I do not want to know the retail price Sad

You don’t want to know Sad
NVSU333A, the world’s first standard, high power UV365nm, NICHIA Nichia factory direct supply

allthumbs
Offline
Last seen: 1 year 3 months ago
Joined: 07/02/2012 - 19:20
Posts: 170
Location: Pennsylvania
johan
Offline
Last seen: 8 months 2 weeks ago
Joined: 05/25/2014 - 12:16
Posts: 12
Location: uk

I have MTE-301 & Nitecore CU6, they are the best available. Nitecore marginally less visible blue spill. I’m having a torch built for me using NVSU333A which should be interesting, will post a review when done on my UV page.

Btw if you want to test the purity a UV torch, don’t use paper (it is dyed to fluoresce), shine it on a spoon, that’ll show you the visible blue spill. The spoon should be black (no reflected visible light at all). If it’s blue you have visible blue being reflected from the torch.

-Johan

Lotus_Darkrose
Offline
Last seen: 1 month 3 weeks ago
Joined: 06/20/2014 - 13:50
Posts: 108
Location: Grand Rapids, Michigan

You don’t want to know Sad
NVSU333A, the world’s first standard, high power UV365nm, NICHIA Nichia factory direct supply]

Wow, like 158 USD each lol. If you order 5 or more it’s 153! XD

devman
Offline
Last seen: 1 year 5 months ago
Joined: 04/27/2011 - 06:24
Posts: 825
Location: Hong Kong / Vancouver, Canada
Lotus_Darkrose wrote:
You don’t want to know Sad “ NVSU333A, the world’s first standard, high power UV365nm, NICHIA Nichia factory direct supply “:http://translate.google.com/translate?hl=en&sl=zh-CN&u=http://detail.168...

Wow, like 158 USD each lol. If you order 5 or more it’s 153! XD[/quote]

So $5 off if you order 5 or more, you say?

New group buy! NVSU333A, we need 150+ people to get them at $3/unit, and they’ll throw in a custom copper DTP star! Silly

Pages