Re: Zone Plate Image Generator

Benno,
 I guess it needs more instructions. I'll put some together and put them on the page. Basically, the width and the height are MM and tell what size film you're going to. Then the focal length is the distance between the zone plate and the film. The number of rings is up to the user. The resolution, DPMM, should be around 100 to get a good image. That translates to roughly 2500 DPI. Are these good enough instructions? Anyone want to add or comment on them?

Larry
    -----Original Message-----
    From: Benno Jones <bennoj@jps.net>
    To: pinhole-discussion@pinhole.com <pinhole-discussion@pinhole.com>
    Date: Wednesday, December 27, 2000 5:58 PM
    Subject: Re: [pinhole-discussion] Zone Plate Image Generator
    
    
    Worked for me.... I just don't know all the proper numbers to put in for a real zone plate. But with guess work I got an image of a zone plate when I opened the file in Photoshop.
    Benno Jones

    John Yeo wrote:

        Larry, Thanks for making this. I'm sure you have already put a lot of work into it... but i get nothing but a blank bitmap. No rings at all. John
            ----- Original Message -----
            From: Larry Fratkin
            To: pinhole list
            Sent: Wednesday, December 27, 2006 3:52 PM
            Subject: [pinhole-discussion] Zone Plate Image Generator
             Folks, I have created a zone plate image generator so that I could make my own zone plates. The program downloads a .BMP so it's PC centric, I think. The idea was to use the program to generate a zone plate image and then take it to the bureau to have it put to film. They charge about $15.00 for this. I haven't tried it out yet so I don't know how well it works. I'll be visiting them on Friday and I'll drop it off then. The calculator/generator is at http://www.MrPinhole.com/zp.html Larry_at_MrPinhole.com
    --
    See my homepage at http://www.jps.net/benshan
      

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Received on Wed Dec 27 21:55:00 2000