🚀 go-pugleaf

coryms+google@azazel.eng.monash.edu.au (Cory Seligman) wrote in message news:<a64581c0.0309242126.7a4fe4ee@posting.google.com>...
> Does anyone know of somewhere I can get stripes like that printed
> directly on the steel? Or etched?
> 
> Any thoughts on producing a clear strip with black stripes
> photographically?

At the very fine end, ruled diffraction gratings are available, but
they're in the hundreds or low thousands of lines per mm.

Ronchi targets are very high precision and have the resolution you
desire, but mounting them to your device may present some difficulties.

Getting a pattern put onto lith film is something your local
repro shop can do for you, and probably something you can deal with
in mounting.

You told us you want a resolution of a few hundred lines per inch, but
you didn't tell us how precisely they must be spaced.  Others have
suggested using consumer-quality printers to do this, and those are
probably capable of giving the resolution you desire, but they are
very abysmal in terms of absolute precision.

Tim.