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| Joined: | Sep 22nd, 2008 |
| Location: | Doylestown, Pennsylvania USA |
| Posts: | 130 |
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Another means of detecting minute vibration movement in the hair might be a CD pickup. The optics are designed to focus at close proximity to a CD and have both IR laser light source and photocell pickup.
I have played with a fiber optic pair of filaments with a light source on one strand and a photo diode on the other. I received variations of reflected light from an exposed earphone diaphram and displayed it on an oscilloscope to entertain the kids.
joecioppi