Woods interference screens/diffraction gratings are similar to the "pellicles" used in one-shot cameras. The Devin-McGraw pellicles were made by pouring gelatin onto a ronchi grating (chrome on glass plate) and then stripped off when set. It would seem that an etched metal plate, as you suggest, would work as well.
Originally Posted by holmburgers
BTW: The Frontispiece of A Handbook of Photography in Colours was the first published "natural" color photograph.