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  1. #1
    Mustafa Umut Sarac's Avatar
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    Making Partial Dispersion Response Filter, Look for Dyes, Powders for Use in Acrylic

    My 110mm f:1.5 Ektar , Summitar , Elmar and Sonnar is strongly shows monochromatic reddish orange partial dispersion glass response to dim light When it happens , may be because of easy to correct a lens to monochromatic light , all the qualities increases folded. All spatial detail response and quantity increases , skin details , relief effect , shadows , shadows on face lines increases and it turns to a image like an image painted with Rembrandt when he is older under mum light. If you look in to rembrandt portrait in the dim light , he uses thousands of thick brush strokes and reddish orange colors.
    An similar thing occurs on Da Vinci Paintings and the thick lacquer medium after oxidised and aged , his paintings have a dark deep coating with making person very excited to find this amount of load of spatial information.

    Now , I defend these qualities since I entered the forum but my lack of knowledge was short to describe the effect.

    And Now I want to coat a uv filter with spinning a partial dispersion dye, nano powder, semiconductor powder added acrylic to sell to the photographers who uses lenses without expensive nonlinear glass. I am thinking to cast a big 3 element anamorphic cylinder lens used objective but this is still to be researched.

    There are scientists at the group who can shed more light to sourcing , mixing , final effect or anything I could not visioned.

    If I find dyes , rare earth nano powders or semiconductor powders affordable or any nano gold, silver, copper powder could be manufactured with Turkovich method, I would be glad.

    This idea is new to me , I will post my findings here also.

    Umut

  2. #2
    Mustafa Umut Sarac's Avatar
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    http://przyrbwn.icm.edu.pl/APP/PDF/116/a116z442.pdf

    Dispersion Properties of Optical Polymers
    N. Sultanovaa
    , S. Kasarovaa;¤ and I. Nikolovb
    aDepartment of Physics, University “Assen Zlatarov”, Bourgas, Bulgaria
    bDepartment of Optics and Spectroscopy, Faculty of Physics, University of Sofia, Bulgaria
    In this report dispersion properties of different types of optical polymers are discussed on the base of measured
    refractive indices and the Cauchy–Schott approximation. A number of dispersion curves are presented in the
    visible and near infrared spectral regions between 400 and 1060 nm. A comparison with some optical glasses with
    similar refraction is performed. The nonlinear dependence of dn=d¸ of polymer materials and test glasses on the
    wavelength is calculated and analyzed. Normalized dispersion curves at 550 nm and 880 nm are presented to
    illustrate better the dispersion of the polymers in the considered spectral regions, separately. Abbe numbers are
    calculated to exhibit the mean and partial dispersion.
    PACS numbers: 42.70.Jk, 78.20.Ci, 78.30.Jw

    Paper indicates two things.
    There is a flat dispersion for all plastics and most dispersion difference is at lower wavelenghts.


    I WANT TO ASK , V879 CHART is indicates the partial dispersion. It changes from 52 abbe number at Optorez and 100 at Zeonex.
    Do higher or lower partial dispersion number indicates higher effect. And lower wavelenghts indicates higher frequency and blue partial dispersion. Am I right ? Does it makes blue photographs. I need the opposite

    Optical polymers
    Wavelength [nm] Abbe numbers
    436.8 486.1 587.6 632.8 703 833 879 1052 Vd V879
    PMMA 1.502 1.497 1.491 1.489 1.486 1.484 1.483 1.481 59.2 96.7
    PC 1.612 1.599 1.585 1.580 1.575 1.569 1.568 1.565 29.1 54.6
    PS 1.617 1.606 1.592 1.587 1.582 1.577 1.576 1.572 30.5 56.4
    SAN 1.588 1.578 1.567 1.563 1.558 1.554 1.553 1.550 35.4 66.6
    NAS-21 1.593 1.584 1.571 1.568 1.564 1.558 1.557 1.554 35.5 56.3
    CTE Rich. 1.602 1.593 1.580 1.576 1.571 1.566 1.565 1.562 32.8 58.3
    S-low styr. 1.531 1.525 1.516 1.514 1.512 1.509 1.508 1.506 44.9 79.4
    Optorez 1330 1.522 1.516 1.509 1.508 1.505 1.503 1.502 1.498 52.0 71.7
    Zeonex E48R 1.543 1.538 1.531 1.528 1.526 1.523 1.522 1.520 56.5 100.5
    Bayer 1.612 1.600 1.586 1.581 1.576 1.571 1.570 1.566 30.0 54.3
    Acrylic 1.502 1.498 1.492 1.490 1.488 1.485 1.485 1.483 57.8 96.9
    Polyacrylate 1.506 1.499 1.494 1.492 1.491 1.489 1.488 1.486 63.3 97.6
    Styrene 1.534 1.527 1.519 1.516 1.513 1.510 1.509 1.507 42.9 77.1
    Cellulose 1.480 1.477 1.471 1.469 1.466 1.463 1.463 1.461 54.1 84.1
    EBM-copol. 1.586 1.575 1.561 1.558 1.554 1.548 1.547 1.545 31.4 58.8

  3. #3
    Mustafa Umut Sarac's Avatar
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    I think I experienced blue green partial dispersion with a kodak ps camera with plastic aspheric lens. All my dim light pictures turned in to blue green. If I am not wrong , plastics are not suitable for red partial dispersion but I want to hear your opinion anyway.



 

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