Dave Hallett Posted May 30, 2015 Share Posted May 30, 2015 As the title really. Does anyone have any DMX controllable UV LED sources? I need to produce a 'strobing' UV source (more of a snap on then immediate off - a la stop motion). Needed in the Wembley area tomorrow (Sunday 31st). Needs to be pretty much as bright as 10 x 400w UV cannons, and emit very little visible light. Feel free to email any time UV <at> big-tick <dot> co <dot> uk or reply on here. Many thanks, Dave P.S. If only they had asked yesterday... Link to comment Share on other sites More sharing options...
Dave Hallett Posted May 31, 2015 Author Share Posted May 31, 2015 With thanks to everyone involved I now have some ADJ lamps which are doing the job. More research needed at leisure to find something with less visible purple light, but all good for tonight. Link to comment Share on other sites More sharing options...
gyro_gearloose Posted May 31, 2015 Share Posted May 31, 2015 For anyone else requiring a UV source that can be snapped on and off at will, without the warm up usually required for conventional UV cannons, you might want to try attaching a dimming shutter to a UV cannon. UsedLighting sometimes have large dimming shutters on their ebay page. I don't know how quick/noisy they'd be though. Another option you could try is to get a large-format scroller and make a scroll with two frames, one of clear gel and the other of something that will block UV (deep red, maybe?). Link to comment Share on other sites More sharing options...
csg Posted May 31, 2015 Share Posted May 31, 2015 the clear gel would block a good deal of the UV too. Shutters may work, but there are decently priced LED UV sources now that are very effective, all be it with slightly higher visible light output compared with a mercury vapour source. Link to comment Share on other sites More sharing options...
musht Posted May 31, 2015 Share Posted May 31, 2015 Rosco, Altman and Apollo all make sub 485nm LED blacklites,not sure which are around in U.K. , guess Wildfire will have something but may be into film rental costs for a not cheap item anyway.https://www.rosco.com/luminaires/mirocubeUV.cfmhttp://www.altmanltg.com/blacklights.htmhttp://www.apollodesign.net/Products/View/4554.aspxEdit to add PRG UV Bullethttp://www.prgrha.com/product/uv-bullet/#tab-descriptionThink its green of varying densities seen used as a scroller UV dimmer, or back in the day a lobsterscope... Link to comment Share on other sites More sharing options...
Dave Hallett Posted June 1, 2015 Author Share Posted June 1, 2015 Thanks all. If they'd let us know before Saturday night we'd have used dimmer shutters. Having now tried the LEDs they're pretty good and do produce 'proper' UV - but there's a lot of visible light too - much more than with a 'conventional' UV source. It would be interesting to try a bit of wood's glass on the front of an LED fixture - perhaps that would give the best of both worlds. In any case the Russians changed their routine (and therefore removed the need for the strobing effect) in the afternoon, so all the effort was for nothing. Ho hum. At least they only got 1.9% of the vote... Cheers, Dave Edit to add votes source: http://www.itv.com/britainsgottalent/insider/bgt-2015-the-votes-revealed Link to comment Share on other sites More sharing options...
musht Posted June 1, 2015 Share Posted June 1, 2015 It would be interesting to try a bit of wood's glass on the front of an LED fixture - perhaps that would give the best of both worlds. Not going to work, UV and near UV LEDs are still LEDs, very narrow band emmitters, ADJ panels are around 400nm,+/- a few nm, hence the visble purple, Woods Glass transmits below 400nm , but there is very little sub 400nm light out of a lower cost near UV LED, result be a very a very black, light ;-) UV LED units linked above use much lower wavelength LEDs, lower the wavelength, the cost goes up a very steep slope. Link to comment Share on other sites More sharing options...
Dave Hallett Posted June 1, 2015 Author Share Posted June 1, 2015 Hmmm - see what you mean. I'm going to have a look at a 365nm fixture at some point to see how it does. At least then I'll know for next time! Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.