I am forwarding Bob's response and the interesting query it contains to the list. Sincerely, Kartik Patel Bombay, India k_patel@vsnl.com
- To: <k_patel@vsnl.com>
- Subject: Re: ATM Vacuum Coating non-glass surfaces question
- From: "Bob May" <bobmay@nethere.com>
- Date: Fri, 15 Feb 2002 11:12:42 -0800
- Delivered-To: k_patel@mmb1.vsnl.net.in
- References: <MABBLMCNAOAPOECIEBFMKEBACIAA.kitgears@kitgear.com> <004c01c1b46a$03100880$6170863e@pqh9u> <005c01c1b512$f9858340$5de64b42@san.rr.com> <003201c1b584$3fed2060$7607bcd8@p120> <010801c1b5da$2cb76900$5de64b42@san.rr.com> <001701c1b61d$d0a278a0$306db5d1@station2> <3C6D2DFB.E0289E83@vsnl.com>
The edge of the CD-ROM is tilted up in an attempt to provide an airspace between the surface and the whatever it's sitting on. Just like the better vinyl records before them. I would expect that the surface will be to the flat quality of a piece of plate glass. It would be interesting to actually find out what the flatness spec is for the optical side of the CD is. Anybody out there with a set of the books for the specs on CDs? 15 years ago, I could have pulled out the set at work but I don't work there anymore. Bob May http://nav.to/bobmay bobmay@nethere.com NEW! http://bobmay.astronomy.net