Laser Targets for show?

[shobley]

Is anyone aware of a substance I could use as a 'target' ? I'm looking for something disc shaped a couple of inches wide that glows nicely when hit by a laser.

I've been experimenting with different translucent plastics and glass, but I wondered if there was a standard material for this kind of thing.

Eventually I want the target to be read by a photocell.

Steve

[steve-o]

Anything painted with flourescent (day-glow) paint usually glows nicely when hit.
What's the photocell for? Power reading?

[shobley]

I want to refine this...

http://www.youtube.com/watch?v=c2NcoWqzMLE

Steve

[steve-o]

Firewall blocked, have to wait till I get home from work to see it..

[shobley]

It's a short clip of the trial run of my laser harp.

With nothing more elaborate than 1/2 silvered mirrors and photocells.

[steve-o]

Oh yeah, Ive seen that!
Very cool

[mixedgas]

orange dayglow plexiglas (green or blue excite)
(glows yellow orange) weak short persistance

rhodamine B or rhodamine 6G dye in clear casting plastic from the art supply store (glows yellow) no persistance

zinc sulphide phosphor (glows green) medium to long persistance
ZnS already doped with additives to glow is avilable from Post Apple Scientific in small quanities.

Steve R

[QUAZAR]

Nice work Shobley.

I think I need one of those.

[steve-o]

..and while you're there at Post Apple you can pick up some salt-peter from grandma Gertie's and play a 'joke' on someone..

[QUAZAR]

This laser harp changes colour when you "pluck" it.

http://www.youtube.com/watch?v=hOM39...elated&search=