The word invisible can be a little bit misleading since the way CDs work is based on several things, not the least of which are laser wavelength and width, geometry of the disc and CD transport, the index of refraction of polycarbonate and the transparency of the polycarbonate layer of the disc -which is in fact not perfectly transparent. The transparency of polycarbonate is only around 90% or so so even if a particular CD treatment is absolutely transparent to the laser light (infrared) the clear layer is still 90% transparent at best. One would also prefer a CD treatment NOT to affect the Index of Refraction of the polycarbonate layer since that could aftect the geometry that has all been worked out already, no?
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- 86 posts total
- 86 posts total