Ultraviolet LED with phosphor paint

Got glow-in-dark paint? UV keychain flashlight? Combine the two. Imagine what you could build. Get UV LEDs from All Electronics or Electronics Goldmine. Get yellow-green "Night glo" Speedball(tm) fabric screen ink from art supply stores. (This is a very early test-video of mine from last April, shot in thumbnail mode.)

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Category:

Science & Technology

Tags:

• ultraviolet
• science
• fair
• experiment
• phosphor
• phosphorescent
• UV
• LED
• physics
• optics
• amasci

[jayandersons]

i was looking for the most effishant way to lite up phospher to improve lighting im hering of blue lasers being more effishent then led

[wbeaty]

@jayandersons Yep, violet 400nM lasers used in blu-ray work well.  They're better than blue-colored 445nM lasers from Casio projector.

[jayandersons]

looking for much brighter like laser on yellow phophus

[wbeaty]

@jayandersons Just buy a violet laser pointer on eBay. The violet ones can charge up your glow-paint. And they're WAY brighter than violet LEDs.

[demolishunDOTcom]

I know it is on the opposite end of the spectrum, but have you tried infrared? I am looking for something that will respond to an infrared laser.

[wbeaty]

@demolishunDOTcom that red orange IR phosphor does it. Expensive stuff. Radio shack sold IR detector cards with a small spot of that phosphor. You charge it up with blue light, then it glows orange when IR hits it.

[Scientiaful]

Are you Lenin?

[imboor3d]

i fucking hate youtubes adds, screw google

[LimaAlphaPapaSierra]

Your drum scanner idea was how the first wire photo systems worked! AM modulating a tone with a photoresistor scanning an image and sending it down a phone line to a lamp scanning over photosensitive paper wrapped around a drum synchronized with the transmitter...

[ken25taylor]

very cool, I love using a photo flash to power up glow in the dark stuff

[demolishunDOTcom]

@wbeaty

Yeah, I would imagine. It seems upconversion materials are pretty rare. It takes more than one photon to produce a single higher energy photon. However, I wonder if one can add energy to a photon by hitting/effecting it with a charge from an electron. That is probably even more exotic. At any rate, it is fun to think about! Thanks for getting back to me.

[PandawdyBob]

crayola totally stole this idea