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Thread: Pinhole, Plate & Sieve Design Software

  1. #1
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    Pinhole, Plate & Sieve Design Software

    I have updated my Pinhole Optics Designer software. The software is run as a web service; and, will produce a multi-page PDF document containing a pinhole, zone plate, photon sieve and pinhole sieve; ready for printing and photo reduction.

    I developed this software for my own experimental work; and, am interested in any feedback anyone can give me with regard to the software. In particular, are there features missing which would be useful to a wider audience.

    New features include the following:
    Draw pinhole sieves
    1 to 1 scaling of the resulting PDF allowing direct printing to a film printer
    Embed the design data into the PDF file as attachments which can be extracted as CSV files using Adobe Readed
    Use true random numbers to generate the photon sieves
    Report logging data to screen

    The url is http://www.markgavin.com/site/pinhol..._designer.html

    Thank you.
    Mark Gavin.

  2. #2
    500+ Posts earlj's Avatar
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    Thank you, Mark. You have done a tremendous service for the rest of the lensless world. I can't wait to try a photon sieve with some of my large format cameras. Have you experimented with any of these focusing devices with constants other than 1.9? Can we use our experience with pinholes, or are these animals less forgiving? I often use an optimum pinhole calculated using the square root of two for a constant. I am curious if a photon sieve or zone plate will give similar results. I guess that I will have to do some testing!
    because:
    "a squid eating dough in a polyethylene bag is fast and bulbous, got me?"
    -Don Van Vliet

  3. #3
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    Hi Earl,
    The Optimal Pinhole Multiplier is only used for calculating the size of the single pinhole. The zone plate and pinhole sieve use exact calculations for the size of the zones. The pinhole sieve is variable based on the starting point in the random number table and the Photon Sieve Dot Area; basically, the density of the dot cloud.

    I do not currently allow the user to alter the minimum distance between dots because I need to add more error handling to the code to check for outlier cases.

    Try shifting the Wave Length around to work with different lighting conditions; and/or, to match the characteristics of the film you are using.

    Regards.

  4. #4
    500+ Posts jon.oman's Avatar
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    This looks interesting!

  5. #5
    500+ Posts earlj's Avatar
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    Thank you, Mark, I will give this a whirl.
    because:
    "a squid eating dough in a polyethylene bag is fast and bulbous, got me?"
    -Don Van Vliet

  6. #6
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    this looks really really interesting, thanks very much!

  7. #7
    Mark, great software, makes life easier. Many thanks for sharing!
    -_- Best wishes from Switzerland, René -_- my photos on flickr

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