We already knew that future generations of Google’s Glass headset would include prescription frames and lenses in addition to rumors of the company working with trendy designers to make the frames more fashionable. Today we get a hint at some of the ideas Google is floating around for future iterations of the hardware via a patent application published today by the US Patent & Trademark Office and first spotted by UnwiredView.

As highlighted by the patent drawing above, Google’s idea is to use see-through displays in order to make Glass look more like an ordinary, traditional pair of sunglasses. Google describes the invention as “A near-to-eye optical system includes an optically transmissive substrate having a see-through display region and a repeating pattern of diffraction elements: expand full story