This is a very interesting discussion. I'm putting September 1927, Photographic Journal, pages 418-419 on my library list and if I can easily find it I will post it.

Just for the sake of mentioning it, analog half-toning is also an option and it doesn't sound that difficult (but what do I know..). However, I guess you'd need a process camera, or a copy camera with a provision for placing the line-screen at various points in the optical path.

F.E. Ives discusses the principle of the "optical-V" in his autobiography (which I can share if anyone is interested, just drop me a line, I've scanned it... shhh...). The key variables are (a) number of lines per inch in the line-screen, (b) distance of line-screen to film plane and (c) f/stop.