World's Smallest Camera Captures Full-Color Images

Researchers at Princeton University have developed an ultracompact camera, the size of a grain of salt that can produce full-color images. Just about 0.5 mm wide, the camera uses new technology called metasurface - with 1.6 million cylindrical posts.

The overall camera system makes use of hardware combined with sophisticated software to produce images. This camera, so tiny, is likely to find immediate use in invasive endoscopy and medical robots to diagnose and treat diseases.