Impedance matching between what and what exactly? Yeah so the treatment adjusts the optical impedance of the polycarbonate surface of the disc. So what? The disc still has to reflect the light from the source so that it can be detected. Oh, so match the optical impedance between polycarbonate of the disc and the glass of the detector lens? That won't help and it's not about that. Accurate clocking of the data is what makes a real difference and that's not on the disc but in the player.
Sony spent megabux to formulate the new polycarbonate used in Blueray; it is one of the most pure manufactured materials known. The current CD or DVD grade material won't allow use of a 405 nm source, only red lasers will work with this stuff because the material is inferior. So no treatment is going to change the composition-dependent optical impedance characterstics of CD grade polycarbonate via a simple surface treatment. You'd have to change the chemistry of the interior that the light passes through as well. Get out the snakes.
The one thing that does make a real sonic improvement to CD playback is the Audiodesk that trues the spin balance of the disc. Now that's physics.
Sony spent megabux to formulate the new polycarbonate used in Blueray; it is one of the most pure manufactured materials known. The current CD or DVD grade material won't allow use of a 405 nm source, only red lasers will work with this stuff because the material is inferior. So no treatment is going to change the composition-dependent optical impedance characterstics of CD grade polycarbonate via a simple surface treatment. You'd have to change the chemistry of the interior that the light passes through as well. Get out the snakes.
The one thing that does make a real sonic improvement to CD playback is the Audiodesk that trues the spin balance of the disc. Now that's physics.