With the Loupe, researchers suggest, the obvious act of holding it up to your eye, rather than gazing into the distance as you would with a head-up display, makes it easier to signal to someone that you’re using it. This could make people around you more comfortable, since they know whether or not you’re paying attention to them—a common concern with devices like Google Glass.
The device includes a proximity sensor to tell when it’s being held in front of your eye, and a magnetometer, gyroscope, and accelerometer help determine its orientation and measure changes so the display can always appear upright to the user. The current version of the Loupe is also tethered to a computer running Android and an Arduino microcontroller.
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