3D Printer Creates Micro-Camera that can be Injected with a Syringe

German engineers have created a camera no bigger than a grain of salt that could change the future of health imaging -- and clandestine surveillance.

Using 3-D printing, researchers from the University of Stuttgart built a three-lens camera, and fit it onto the end of an optical fiber the width of two hairs.

Such technology could be used as minimally-intrusive endoscopes for exploring inside the human body, the engineers reported in the journal Nature Photonics.

It could also be deployed in virtually invisible security monitors, or mini-robots with "autonomous vision."

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