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The process starts by illuminating a scene with a monochromatic light source—a laser. (While using a metalens to capture a full-color image is conceptually possible, that is still a lab experiment and far from commercialization.)

So.. it's a design of a sensor which can intuit depth, and other elements of a visual field currently under monochromatic and I would suggest highly coherent light.

its a "lens" but it's a long way from "I want Bokeh on this picture of a girl feeding a squirrel"

I suspect that for now, without illumination from a known source, this lens isn't going to be "useful" on the back of a phone.

It is going to be useful for all kinds of sensing and imaging, "photography" is a subset of imaging overall.

Maybe a smaller, more swallowable robot, with an illuminating laser and this sensor, can now take microphotographs inside the gut? Or be placed inside a vein or artery, at the end of a fibre optic/power lead?