About this time last year, I was experimenting with origami pinhole cameras, with both photographic paper and black card (with film). What interested me, was how a simple manipulation of the medium allowed it to become a complete means of image-making.
Further experiments involving zone plates and camera-less photography, as well as a meandering train-of-thought, lead me to ponder the possibility of a photographic image that was capable of reproducing itself, ad infinitum. The notion posited a kind of photographic quine that is at once original, reproduction, and apparatus.
Deeper contemplation lead me to the realisation that if an image of a zone plate of “normal” perspective could be made at 1:1 scale, using identical zone-plate optics, then the image could be used to reproduce produce itself. (It wouldn’t practically matter if the image produced was positive or negative, as the zone plate could still work optically.) In the real world, of course, the number of “generations” would be limited by creeping image degradation, leading to “sterile” images that could no longer “reproduce”, but the conceptual basis of the process is certainly intriguing enough.
Further experiment pending.