Engineering360: "Flat lens designed for focus-free camera imaging"

It's basically a lens that behaves like a pinhole camera, as far as I can tell. The trick, they say, is that an image is only a recording of light amplitude and not relative phase, and that this allows a degree of freedom that can be exploited to control characteristics of the lens. Here is a document that explains more about it.

https://arxiv.org/ftp/arxiv/papers/1910/1910.07928.pdf

Is it not simply an age old Fresnel lens with smaller dimensions?