Visualized: Google Glass prototypes

Engadget - As a part of the 7 Techmakers and a Microphone panel tonight at Google I/O, Project Glass Staff Hardware Engineer Jean Wang dropped in this slide reflecting on the process of developing the headset. We've seen pictures of a few early Glass prototypes before, but as she describes, this shows off the full process from strapping a cellphone to a pair of goggles along with a pico projector shining directly into the wearer's eyes. The jump from off the shelf components to custom 3D-printed materials is represented in the third version (top right), and allowed the progress seen along the bottom row.

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