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It could be something akin to holography. To put it simply, they can have the same optical density, but re-write over it several times in other colors. The sam
by tomswartz07 12y ago
It could be something akin to holography.
To put it simply, they can have the same optical density, but re-write over it several times in other colors. The same lens can observe and read the exact point, interpreting the data in (for example) blue, green, and red.
- Dylan16807 12y agoThat is something that's possible, but I doubt its practicality. The longer wavelengths can't store as much data even under ideal conditions, and squeezing them in causes interference that hurts the density you have on the best wavelength. Plus you would need a much more elaborate disc-pressing mechanism. Much simpler to add more monochrome layers.