<Noxz>
looking into Digital RedOuts (DRO, for, say, a mill) and most of them seem to use linear/rotary encoders.. and though about laser distance sensing instead.. kinda looking into it some.. a few systems use a retroreflective target
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<Noxz>
also meant to paste that into a different channel, about retroreflective stuff ;)
<Noxz>
linear distance is a bit easier than full tracking
<Noxz>
mostly time of flight
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<nmz787>
I am still perplexed as to why MEMS interferometers aren't a cheap commodity yet... seems like they'd be pretty easy to build into some really easy to use distance meter modules
* nmz787
was just searching for them over the weekend, on ebay at least
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<SpeedEvil>
nmz787: whatdo you mean.
<SpeedEvil>
They are, they're $1 each.
<SpeedEvil>
If you mean for distance measurement, you pretty much can't do that, as you need to double-integrate the signal, to get range, which murders your noise.
<SpeedEvil>
As in - it drifts by a large slice of a kilometer in ten minutes.