Kind of... circular or hemispheric diffraction.

[ysr2096]

Would this be possible? Preferably a circular spread. I'm, uh, a noob.

Kind of like this:
woodlaserengraver.com/wp-content/uploads/2010/11/Laser-Grating.jpg

Only more like this:
i56.tinypic.com/2w66r7s.jpg

 

[ysr2096]

Bump.

 

[Bluefan]

The diffraction efficiency drops with every order, so with larger angles there will be less light. Smaller slits in the diffraction grating give more orders, but are in total less efficient unless you have more slits, which gives fewer beams.