Re: Zone Plate Image Generator

John and folks,
 If people would like one for photographing I would be happy to do it. Just let me know if there's interest. The calculators on my site were usually made because I thought I needed them and then thought that maybe others need them too.

I would be interested in seeing the source code to see how you did it. I'm also curious what format you generated. My web host only allows Perl, so I'd have to translate it.

Larry
    -----Original Message-----
    From: John Yeo <jonnieo@thegrid.net>
    To: pinhole-discussion@pinhole.com <pinhole-discussion@pinhole.com>
    Date: Wednesday, December 27, 2000 9:54 PM
    Subject: Re: [pinhole-discussion] Zone Plate Image Generator
    
    
    Hi Larry,
    Nevermind that. For some reason, microsoft paint displayed nothing, while photoshop displayed it properly. I was expecting an output that one would photograph from a distance like what they have at http://members.home.net/hmpi/Pinhole/Articles/ZonePlate/Zone_Plate.htm. Is that how it is supposed to work, or does it give one the actual size? I made a zone plate calculator a while ago in visual basic. It calculated ring sizes, magnified sizes (for photographing from a distance) and also calculated the true f stop (just the area of the clear rings). If anyone wants it, I can compile it and send it out. If you want to add to it, let me know and i'll give you the source code. I don't really care what you do with it, post it on the web, whatever.
     
    John
        ----- Original Message -----
        From: Larry Fratkin
        To: pinhole-discussion@pinhole.com
        Sent: Wednesday, December 27, 2006 6:47 PM
        Subject: Re: [pinhole-discussion] Zone Plate Image Generator
        
        
        john,
         Yes, I did put a few hours into this, but it was fun. Thanks for appreciating that.
         
        What were the settings you typed in? I'd like to repeat them to see what I get. Also, sometimes you really have to look for the zone plate in the middle of the image.
         
        Larry
            -----Original Message-----
            From: John Yeo <jonnieo@thegrid.net>
            To: pinhole-discussion@pinhole.com <pinhole-discussion@pinhole.com>
            Date: Wednesday, December 27, 2000 4:48 PM
            Subject: Re: [pinhole-discussion] Zone Plate Image Generator
            
            
            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@MrPinhole.com
                 
Received on Thu Dec 28 09:30:53 2000