Control on Refractive Index of Liquid between Two Cylinder Lenses for Correction

Discussion in 'Camera Building, Repairs & Modification' started by Mustafa Umut Sarac, Jun 7, 2014.

  1. Mustafa Umut Sarac

    Mustafa Umut Sarac Member

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    I am still thinking for better DIY lenses made with less controlled parts.
    I selected cut lenses from cylinder acrylic tubes and filling between elements with high or lower index water iodide mixes.

    How much does liquid element contribute the quality of final design ?

    Anyone can prepare an high , very highy or moderate index mixes from above material .

    I want to get your opinion ,

    Thank you,

    Mustafa Umut Sarac
    Istanbul
     
    Last edited by a moderator: Jun 7, 2014
  2. Dan Fromm

    Dan Fromm Member

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    Get a ray tracing program, measure the plastic's index of refraction, radii, and so on, and ask the program what it thinks. Or just ask the Hodja's donkey.
     
  3. Mustafa Umut Sarac

    Mustafa Umut Sarac Member

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    I cant find a better donkey than you ! Idiot !
     
  4. Dan Fromm

    Dan Fromm Member

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    Tsk, tsk, tsk. Who posts in a public forum must expect responses that don't please.

    And who knows? Perhaps the donkey has learned to speak.
     
  5. Jim Jones

    Jim Jones Subscriber

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    Is there a need in photography for highly corrected cylinder lenses other than anamorphic panoramic adapters? For that purpose, improvised optics are unlikely to be good enough. The acrylic tubes would have a circular contour, not the parabolic contour more likely needed for image forming. Also, the acrylic tubing may deform.
     
  6. Xmas

    Xmas Member

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    In normal lenses the radia are held the same within production tolerance or optically flat and the filler is close to (intermediate between) glass refractive indicies to minimise reflections and a compound to passivate both glasses.

    Cemented elements are expensive to manufacture.

    The filler can include a dye to keep the lens neutral.