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- From: v114qgu3@ubvmsd.cc.buffalo.edu (Henri Defense)
- Newsgroups: rec.audio
- Subject: MiniCD's
- Message-ID: <Bz9KIJ.HwB@acsu.buffalo.edu>
- Date: 14 Dec 92 19:23:00 GMT
- Sender: nntp@acsu.buffalo.edu
- Organization: University at Buffalo
- Lines: 16
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- Nntp-Posting-Host: ubvmsd.cc.buffalo.edu
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-
- The idea of the digital music cartridge was very interesting. However,
- here's a technologically and econmically feasible idea I think audio consumers
- should push: MagnetoOptical MiniCD's.
- One of the reasons why CD's have to be so "large" is the high wavelength
- of the laser used. Currently the lasers are infrared (970 nm). This places a
- limit on how small the CD's pits or MD's Kerr spots are. I've read that JVC
- and/or Philips have tried using visible blue lasers of higher frequency, which
- can read smaller pits. Apparently, by switching to blue lasers, it was possible
- to cram all the data on a 4 3/4" CD onto a disc MiniDisc-sized.
- Although I am not certain if the size of the Kerr spots on a magneto-
- optical disc can be shrunk using a higher frequency "heating" laser, I think we
- shouldn't set our sights on re-recordable CD's, but on MiniCD's using MiniDisc
- technology and higher frequency lasers.
-
- I'd welcome any comments.
-