Originally Posted by BetterSense
Now you're talking. The "contact halftone screen" needs a vacuum as already pointed out. But older technology glass screen will solve that problem because you have to shim it a certain distance away from the lith film to get a penumbra.
Get the photoresist guys to make you a linescreen grid on glass. A checkerboard pattern. They have the tools to draw lines an atom thick. They could make a checkerboard right off the bat (the old timers had to draw straight lines and cross them for a sandwich. For your purpose look for maybe 65-85 lines per inch. You can experiment with available lith film. There may be unevenness due to your film not lying flat.
I always appreciate your ideas to apply technology in unexpected ways