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Article #15960Re: New (to me) laser-beam pickup application
From: Scott Dorsey
Date: Sun, 03 Jan 1993 22:20
Date: Sun, 03 Jan 1993 22:20
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In article <72811@cup.portal.com> Chris_F_Chiesa@cup.portal.com writes: >By now we all (hopefully) know that lasers are used to read signals from >CDs and videodiscs, but last weekend while visiting friends over Christmas >I heard of a new application for the same (or similar) technology: reading >good ol' vinyl records by contactless laser pickup. Has anyone here heard >of this, and can anyone provide any details on HOW it is being done? This >is one of those ideas that, to me, seems obvious in retrospect, and "it's >a wonder nobody thought of it sooner." You are thinking of the Finial laser turntable. It was really a bad idea, since any little imperfection in the groove wall would show up as a tick or a pop. While it did do a very good job of playing back records in good shape, it would bring out a lot more surface noise than conventional playback, and it had great difficulties tracking warped recordings, or records with an off-center hole. Finial sold about twenty of the machines at $15,000 each, before going bankrupt. There is a small Japanese company which has taken over the design, and is making the laser turntables on a one-off basis for archivists. They are significantly more than $15,000, and except for being able to salvage certain types of damage, they don't do half as good a job as a conventional pickup. Save your money and buy a Benz-Micro cartridge and an SME arm instead. That'll put you back a few thousand bucks less and you might even have enough left over for a nice turntable. --scott
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Path: arc1-ca.pugleaf.net!sparky!uunet!news.larc.nasa.gov!grissom.larc.nasa.gov!kludge From: kludge@grissom.larc.nasa.gov (Scott Dorsey) Newsgroups: sci.electronics Subject: Re: New (to me) laser-beam pickup application Date: 3 Jan 1993 22:20:46 GMT Organization: NASA Langley Research Center and Reptile Farm Lines: 26 Message-ID: <1i7oruINNd3r@rave.larc.nasa.gov> References: <1992Dec30.065648.29072@ole.cdac.com> <72811@cup.portal.com> NNTP-Posting-Host: grissom.larc.nasa.gov