History
William K. Heine presented a paper entitled A Laser Scanning Phonograph Record Player to the 57th Audio Engineering Society (AES) convention in May 1977. The paper details a method developed by Heine that employs a single 2.2 mW Helium-neon laser for both tracking a record groove and reproducing the stereo audio of a phonograph in real time. In development since 1972, the working prototype was named the "LASERPHONE" and the methods it used for playback was awarded U.S. Patent 3,992,593 on November 16, 1976. Heine concluded in his paper that he hoped his work would increase interest in using lasers for phonographic playback.
Read more about this topic: Laser Turntable
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