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  1. J

    Diffraction lens that produces a ring?

    Does anyone know where i can buy a diffraction lens that will produce a ring pattern.
  2. J

    Where can I buy inexpensive axicons?

    Im looking for a 3-5mm axicon for around $20? can anyone give me a point in this direction?
  3. J

    How are pattern heads made?

    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?


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