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  1. #1
    Mustafa Umut Sarac's Avatar
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    Control on Refractive Index of Liquid between Two Cylinder Lenses for Correction

    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 Mustafa Umut Sarac; 06-07-2014 at 02:21 PM. Click to view previous post history.

  2. #2

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    Quote Originally Posted by Mustafa Umut Sarac View Post
    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
    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. #3
    Mustafa Umut Sarac's Avatar
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    Quote Originally Posted by Dan Fromm View Post
    Or just ask the Hodja's donkey.
    I cant find a better donkey than you ! Idiot !
    Can you please ask easier questions ? One Apug members request .

  4. #4

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    Quote Originally Posted by Mustafa Umut Sarac View Post
    I cant find a better donkey than you ! Idiot !
    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. #5
    Jim Jones's Avatar
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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. #6

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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.



 

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