Ali Hajimiri, a professor of electrical engineering at Caltech, says a technology based on an inexpensive, tiny and highly accurate device known as a nanophotonic coherent imager, or NCI, while it's less than a square millimeter across, provide superb depth measurement accuracy. Each pixel on the chip is essentially an independent interferometer - an instrument that uses the interference of light waves to make precise measurements - Hajimiri says their accuracy and size make them ideal for applications from biomedicine to 3D image capture for 3D printing output. You can read the whole story here: http://3dprint.com/55870/tiny-chip-f...ize-3d-imaging