Lens array or mold needed

Discussion in '3D Design Requests' started by sParekh, Aug 15, 2012.

  1. sParekh
    sParekh New Member
    I need someone to help me make a mold for a lens array
    It should mold hemisphical lenses arranged in a hexagonal / honeycomb design
    It should be possible to connect many molds together to make a larger array. So this needs well fitting edges
    if some arrangement of a top or cap is possible to provide a flat substrate, it would be good. The mold will hold transparent casting resin, so there must not be any run of colours used
    Approx size of each lens is 5cm diameter. Each separated by the diameter to the next in a honeycomb arrangement.

    Also, I don't think it's possible to 3d print using transparent materials. If I could I would print the lens array directly and not be forced to make a mold. I would be happy if someone told me this WAS possible!

    Many thanks
  2. stonysmith
    stonysmith Well-Known Member Moderator
    None of the materials that Shapeways has are what you would call "clear". At best, they're translucent.

    Beyond that, the "mold" you are asking for is going to be tough due to the stepping inherent in the 3d printing process.. you might be able to get a rough shape, but it's going to take a LOT of grinding / postprocessing to get the item smooth enough to not have severe disturbance of the visual field.
  3. stop4stuff
    stop4stuff Well-Known Member
    Hi Sanjay,

    If the orientation of a model could be decided by the designer/model uploader this could be possible, but there still would be a lot of post processing work involved as mentioned by stony.

    Another option for a lens is to go with a 'spin cast' lens such as described by Dan Rojas of GreenPowerScience, simple in principle but I'd imagine difficult in implimentation.


  4. sParekh
    sParekh New Member
    I wonder infact if there are an modellers out there who could construct this mold -(or indeed the lenses) using a Stereo Lithography method?
    I should be able to use transparent resins in that case