So it looks like they used an enlarger to basically create a bracketed exposure of the image. There must have been some means to make a raster pattern across al

So it looks like they used an enlarger to basically create a bracketed exposure of the image. There must have been some means to make a raster pattern across all N exposures, and if light could pass through a given exposure it made a puncture in the tape. Playing this backwards, if you have a light shining through 1-N holes in a strip and concentrated through a lens to a point moving in the same raster pattern, it should reproduce the image.