[sdiy] Laser Harp in action

[Richard Wentk]

At 17:54 28/06/2004 +0100, Oakley Sound wrote:
>Synth-DIY's very own Mark Smith and I, along with Martin Frankcom have
>managed to build a successful laser harp of staggering proportions.
>Modelled on the later harps as used by Jean Michel Jarre it uses back
>scattering and not top sensors to indicate when a beam is broken. Its
>built into a single 4U SKB case and the harp appears in a big fan rising
>skywards from the top of the unit.
>
>Making the harp was an interesting experience and a dangerous one too.
>This harp's laser is hot enough to blind instantly and it even managed
>to burn a small hole in my power supply by accident.

Did you get it up to 650mW in the end? If so, some questions:

Is that a DPSS source?
Where did you get it, and how much was it?

I've been doodling designs for a different kind of laser harp. Any ideas 
about where to source high-power DPSS systems are always welcome.

Richard