Here is the paper their tech is based on: http://graphics.stanford.edu/papers/lfcamera/ http://graphics.stanford.edu/papers/lfcamera/ Basically, the light isn't

Here is the paper their tech is based on: http://graphics.stanford.edu/papers/lfcamera/ http://graphics.stanford.edu/papers/lfcamera/ Basically, the light isn't focused to a single plane, but rather is sent through an array of microlenses which can be sampled in various ways to simulate the focal plane of a traditional camera.