Jan 30, 2012 #1 S skhandelwal 0 Joined Jan 30, 2012 Messages 1 Points 0 Where do I find this? Thank you. Last edited: Jan 30, 2012
Jan 31, 2012 #2 brendon7358 0 Joined Jul 2, 2011 Messages 1,011 Points 63 http://laserpointerforums.com/f40/pink-laser-500mw-41039.html ?
Jan 31, 2012 #3 ARG 0 Joined Feb 27, 2011 Messages 6,772 Points 113 I think you mean a diffraction grating? :thinking: Try the dollar store?