@slyka I was not aware of the layering of CDRs. So,...

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Leeloo

@slyka
I was not aware of the layering of CDRs.

So, did it play in a CD player? Was it able to ignore the "scratch"?

Like 26 August at 16:41 | Wall-to-wall | Open on techhub.social

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Kris\Slyka

@leeloo I don't have anything to read CDs with anymore, but I doubt it. Even though there is some amount of error correction in CDs this basically completely covers a continuous section of the surface in relatively deep scratches

26 August at 16:43 | Open on pawb.fun

Leeloo

@slyka
But the claim is that the laser is not focusing on the scratch, so it should be able to look right past it.

26 August at 16:45 | Open on techhub.social

Kris\Slyka

@leeloo it's still an interface between two materials with different refractive indexes, which due to the grooves ends up at pretty steep angles. That's gonna refract the light all over the place wether it's focused on the interface or not. I'd love to be proven wrong but I don't really see that working too well

26 August at 16:52 | Open on pawb.fun

Leeloo

@slyka
I know, that's why I would like to see the results.

I'll be impressed if it can play, but might also say something about false advertising if it doesn't.

26 August at 17:09 | Open on techhub.social

Alan Miller :verified_paw:

@leeloo @slyka a CD player would work for discs with low amounts of data because the central part of the disc isn't affected. The cut part would almost certainly be unreadable because of what's basically a diffraction grating cut into it.

26 August at 19:28 | Open on infosec.exchange

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