https://armdevices.net/2011/06/08/serafim-shows-42-optical-touch-module-otm-multi-touch-screen/ New video posted every 8 hours, forever Wed, 08 Jun 2011 16:16:00 +0000 hourly 1 https://wordpress.org/?v=7.0.2 https://armdevices.net/2011/06/08/serafim-shows-42-optical-touch-module-otm-multi-touch-screen/comment-page-1/#comment-9692 Wed, 08 Jun 2011 16:16:00 +0000 http://138.2.152.197/?p=9688#comment-9692 Serafirm have probably licensing their optical touch tech from New Zealand company Next Window which has been aquired by an Canadian company.
Here an overview of the diffencies between the different touch technologies on the market today, how they works:
http://www.nextwindow.com/optical/comparison.html

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