Digital Information Development (DID) has developed a highly portable virtual piano that is played with a keyboard consisting of projected laser beams. The box-shaped device measures about 10 x 3 x 3 cm (4 x 1 x 1 in.) and weighs about 100 grams (3.5 oz.). Using a red semiconductor laser module and holographic optical element, the device projectsfor more: http://www.futuristics.eu/news/archives/category/all-posts/lightning/
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