It's a truly amazing piece of technology. Thanks to the generosity of my colleague Daniel Ashbrook I now have access to his LASER cutter. But this sort of safety goggles can be purchased for about $1 apiece when on sale. I started thinking that ski goggles might be a better starting point than safety goggles. I know it needs a more rigid frame, but again I decided not to expend more effort on this particular prototype. (Lenses sit in just-right sized holes in foam core and are sandwiched by black plastic from plate which fit goggles and craft foam.) KNEX mounting of phone showed promise, though sagged in this prototype. However my sandwich lens mounting diminished this as I cut the outer layer holes too small and wasted too much of the lens. Better lenses (stolen from a pair of binoculars) with shorter focal length (about 3 1/4 inches) meant smaller design and better field of view in early tests. Based this design on a pair of safety goggles. Got this prototype far enough along to learn from it without completing it. (Yes, I know mine is quite thick in this photo, but I knew that was a problem and addressed it in subsequent prototypes.) As a result, their apps have a big black bar down the center and they are wasting pixels and making the perceived view narrower. One of the flaws in their design, is that the septum (which prevents each eye from seeing the other's half of the screen) is off center.
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