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Fascinating! What do you mean by light pipe in the second point? As in touching the LED package itself or a fiber optic strand?
by jakecopp 8y ago
Fascinating! What do you mean by light pipe in the second point? As in touching the LED package itself or a fiber optic strand?
- jotux 8y agoHere's a photo of a motion detector with a lens and a light pipe above it: https://d1unzhqf5a606m.cloudfront.net/images/product/honeywell-5898-wireless-dual-tec-motion-detector.png?1441825033 https://d1unzhqf5a606m.cloudfront.net/images/product/honeywe... It could detect a finger touching the surface of the light pipe.
- delinka 8y agoThe “light pipe” is a fat fiber optic channel. Light comes in the end, gets reflected by internal sides and curves, makes its way out the other end and to a detector on the circuit board. The way the end surface interacts with light allows the detection of things touching the surface of the pipe.