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Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4061
Hi, can anyone think of a use for UV diodes?
have to buy a sensible quantity but at 6E each + 16.95E postage it seems an expensive way to tell if it works.
These are proper tested ones BTW none of that failium (tm) I bought last time. Apparently peak power is in the 5.5mW range at 350-370nm viewing angle 3 degrees.
Incidentally thanks Stella for the Tb doped sheet, seems to work with alpha particles from 241Am too if you irradiate the photosensitive side. For some reason this source seems "hotter" than most so I can see the glow (yellow-green) in a darkened room.
I can send them untested or try one out first to see what the performance is like. These have internal Zeners to prevent static damage as well. -Andre
Registered Member #54278
Joined: Sat Jan 17 2015, 04:42AM
Location: Amite, La.
Posts: 367
I am very interested in finding aLED's in the UV-spectral "SOLAR BLIND" region, especially as high as 5mW power range. However, I think the range is somewhere like 250nm - 300nm (...not 100% sure). One applications is non line-of-sight optical communications in bright sunlight. I have even seen a "solar blind peak" photomultiplier lately. I have -never- seen mW-level compatable UV LED's! Maybe a lot has happened in the UV-LED technology in the last few years. How expensive are they?
Registered Member #162
Joined: Mon Feb 13 2006, 10:25AM
Location: United Kingdom
Posts: 3140
I've wanted useful u.v. leds for decades ! I've settled for low pressure mercury tubes, lots of light at 184 and 253 nm, or just 254nm via borosilicate glass.
Registered Member #54278
Joined: Sat Jan 17 2015, 04:42AM
Location: Amite, La.
Posts: 367
Just found on ebay LEDs 310, 275, 265nm. From memory 1980's: found a small eprom eraser-matched ROM quartz circle ~254nm. IIRC: from "JKL lighting" not LED
Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4061
Good find. I think they are good diodes but not sure without ordering some. If you get any 265 or 275nm ones let me know, as I have some old EPROMs that need erasing.
EDIT: I have two UV LEDs from my broken nail lamp (don't ask!!) pre-mounted in bottle caps with approx 45cm flying leads and parallel antistatic resistors. Estimate power in the 20mW range but still useful. Confirmed that the varnish still dries with a single diode at close range and I'd picked the least bad ones from the back edge as they had the best heatsinking.
Anyone have a use? I can still be contacted on my old Email address.
Would be happy to sell on my encapsulated spares, confirmed they are intact and antistatic protected.
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UV diode group buy
