EdgeLaser : Edge mounted laser based touch sensors

This prototype touch sensing system built in 2010 was developed as a retrofit solution to add touch sensing capabilities to normal displays. The system works by triangulating the finger position from a scanned laser beam. It has the ability to sense single point of touch and a refresh rate of about 160 Hz. The hardware was designed to be low cost, with estimated production cost of about 20 USD for each display.

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Demo of mounting the sensors onto a display

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Close up of laser sensing modules

 

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The acquisition electronics

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