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Re: No offense intended (at least by me)

"Re: CDs. Changing the modulus of elasticity makes for a "floppier" CD with more self-damping. The theory is that it flutters less while rotating than a more rigid CD (all CDs are out of round and out of balance, just to tolerance specs), thereby putting less load on the focus-correct and tracking-correct circuits. So far, so good. "

A floppier cd that vibrates less than a rigid one??? Oh really! Talk about faulty logic... How is it that all these waves that will be traveling up and down the cd (like a Manger driver!!) now because it is floppier going to affect a focusing laser that must be accurate on the micrometer scale???

If cryogenic treatment affects anything about polycarbonate it will likely affect the refractive index of the material slightly. This means that laser passing through will be offset by a slightly different amount than it was before because as you know due to Snell's law the amount the light bends is a function of the refractive index between air(or vacuum or other material) and the material the light passes into. This offset could be enough to result in jitter (because the 1 and 0 are now timing a bit different because the definition of the edge could have changed), in which case the cd could sound worse (or better if it actually reduced jitter). Does that sound more plausible to you? I have no idea if it is right but it is more likely a cause than your floppy/rigid explanation.


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  • Re: No offense intended (at least by me) - morricab 02/1/0608:20:24 02/1/06 (0)
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