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Discussion in 'Pickups & Electronics [BG]' started by TriplePowerMax, Feb 7, 2006.
Guys, where can i find in internet structure and principle of operation of optical pickup?
There are links to patent drawings here: http://www.opticalguitars.com/
I tried building a few systems way back when Ron Hoag first got writeups in the guitar magazines. The principles are fairly straightforward. Have fun!
Here's an optical pup for you. Interesting design, no laser involved but a very interesting design.
maybe someone know arcticle with electrical characteristics of optical pick up? Im interested in that pic up as a electrical device.
indeed anyone don't know?
This is talkbass not MIT . I've got a Lightwave and haven't got a clue. I play it, don't make it.
I would try a Tech University Library like MIT or CalPoly since their job is assisting with providing information. Dow/Corning, Lightwave Systems, and the like won't likely take the time and I wouldn't expect them too. A net surf for fiber optics and the like may turn up something of use.
just wondering, will these basses make a sound if you wave your had infront of the pickup?
No. There are optical sensors back inside the bridge (monoliths as they call them) that operate within a narrow range and sense motion of the strings. They won't make a sound any other bass wouldn't make under similar conditions except I've read that strobe lights can possibly trigger them inadvertantly though I've never experienced that.
Not sure I should post this with the lead in above but
The Lightwave pickup appears to be constructed from an IR LED as the optical source combined with a photodiode with integrated IR filter used as the receiver.
Not sure what Audere said but I'm guessing he knows what he's talking about.
What I do realize is that I didn't point out that you can't wave your hand in front of the pickup. It's not in the face of the bass like a mag pup. It's just a couple of small round sensors (pup screwhead size or smaller) that are located back in the hollow bridge pieces (monolith) for each string, so effectively in a tube. Kind of like and infrared beam enclosed in a small box - although there's no apparent light when you look back in the bridge.
Here is a project worth raising a zombie thread for: http://makeprojects.com/Project/Infrared-String-Bass/2049/1#.UBGVuaPuhI0
"lightwave" Stick bass = "Stass" (rhymes with chase).
(as opposed to Stick Ukulele = Stuke (rhymes with puke)