Short version:
Anyone know where I can get something printed on a transparency at 2500 DPI?
Long Version:
So, krnodil has got me thinking about zone plates. I found what looks to be a great resource for creating my own zone plates (they do all the math and actually generate the image file), but I now need to print the output at 2540 DPI on a transparency. Anyone have any idea where I could get this done? I have no desire to buy a printer, by the way, I would just like to walk in somewhere and get it done (or, less ideally, send the image somewhere and have the results shipped back). Just for kicks, I called a local Kinko's but the woman I talked to didn't seem to understand what I needed (so I still don't know if they could actually do it). Anyone have any other ideas?
You might try a place which images slides/transparencies from files (e.g. Cantoo in Berkeley).
If you just need high-contrast B&W, I can image to graphic arts film at 2400 dpi at the place I work. I've printed patterns of black lines on clear film before.
It is just B/W. Here's an example of a zone plate image:
It's basically exactly that, printed at 2540 DPI (which makes the diameter of the outer ring about 3mm when printed). The output from the site I am using is a png file.
I watch with interest. Good luck with this, sorry I can't offer any constructive advice. This is exactly the issue that led me to buy a pre-made one. Do post how it works out for you.
You totally got me hooked on the idea, and by gosh I'll get one made yet! Hopefully the General can help us out.... Of course, if anyone else has any ideas, feel free to jump on in here!
It looks like something I can output, but only at 2400dpi, not 2540. Not sure what to do about that except re-sample, if the physical dimensions are what's critical.
I'm going to PM you an alternate email where you can send the file and I can test it out -- include your mailing address.
So, when I set your file to 2400dpi, I get a square about 2" with a teensy pattern about 1/16" in the middle -- if you're making something like a pinhole camera that should be about right.
Go to any Graphics Repro House ( a place where they prepare films for lithgraphic printing (printing). And ask them for litho films output at 2540 dpi (or RES100) as we say here. That is very basic resolution. Most image setters will do RES200 or (5040dpi) as standard. There are some higher resolution image setters used for bank note printing, but not surprisingly they are hard to get hold of.
