Jun 23, 2011 #1 J JustB 0 Joined Jun 23, 2011 Messages 6 Points 0 How are the pattern heads (cicle, triangle, star, etc.) made that come with those cheapo laser pens on ebay? They look like a thin piece of plastic? how does that change the pattern of the beam?
How are the pattern heads (cicle, triangle, star, etc.) made that come with those cheapo laser pens on ebay? They look like a thin piece of plastic? how does that change the pattern of the beam?
