Archived posting to the Leica Users Group, 2001/04/26

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Subject: Re: [Leica] OT - Laser Turntable
From: Stan Yoder <vze2myh5@verizon.net>
Date: Thu, 26 Apr 2001 14:12:18 -0400
References: <200104261507.IAA04791@mejac.palo-alto.ca.us>
 
Paul Chefurka wrote:
>
>On this off-topic, take a look at http://www.elpj.com/
It's a laser turntable originally conceived in the 80's by a company
called Finial.  It does basically what you're talking about with a
scanning laser.


Back in the late-30s or 40s, Philco had a phono turntable that read the
(78rpm) grooves not with a needle but with a light beam/photocell
arrangement*. Non-contact-thus-non-wear was a selling point.

*dunno how the arm was made to track radially.

Stan Yoder
Pittsburgh