Double Mura Tele,one decipher other

Discussion in 'Camera Building, Repairs & Modification' started by Mustafa Umut Sarac, Sep 16, 2008.

  1. Mustafa Umut Sarac

    Mustafa Umut Sarac Member

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    Imagine , you use a tube with there is one mura at the each side.
    First mura focus the image to the second one and second one decipher it.
    As you know mura is a multi pinhole lens and needed to be computer or mechanical deconvolution.
    If a focusing glass screen or a fogy plastic used at the middle of the tube , it could be interesting too.
    Or one big mura at the front and second smaller mura at the other side for 35 mm film.
    May be some one construct a giant emulsion on glass camera with two giant very bright mura and fastest 1 ASA , biggest format tele camera.
    Most importantly , does it work ?

    Best ,

    Mustafa Umut Sarac

    Istanbul
     
  2. T Hoskinson

    T Hoskinson Member

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    Definitions of Mura

    My experience with Mura comes from its use as in Manufacturing Quality Control Applications:

    Mura (a Japanese term), is a Japanese word for unevenness, inconsistency in physical matter and is used as such in the Toyota Production System and in Lean Production. In Quality Control applications it has pretty much become synonymous with WASTE.

    Mura is word that is increasingly also being used to describe an unevenness, brightness, non-uniformity blemish, or inconsistency in a display device (like a monitor. The clouding effect is generally limited to LCDs because plasmas have a different back light technology.

    I'm a Senior Member of the American Quality Society.
     
  3. Ole

    Ole Moderator Staff Member Moderator

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    Mustafa is asking about MURA, not Mura or mura. MURA is an acronym for Modified Uniformly Redundant Array.

    Beyond that, I have no more useful knowledge about this.
     
  4. keithwms

    keithwms Member

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    So, Mustafa, is this a pinhole array you are talking about?

    If so, I am concerned that the diffraction softening, once imposed at the front panel, will not be solvable with any other transformation. Likewise, even if it's not pinhole array but rather a glass lens array of some sort, you will take a hit on MTF no matter what you do. Though, indeed, you could "decrypt" some of the information. Just not much. You could correct for chromatic ab. I suppose. But what diffraction takes away, you aren't getting back.