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In Reply to: Re: Perhaps you would prefer a different color, say posted by 4frank2 on January 1, 2007 at 08:55:58:
Is a compliment colour not about visible light? A cd player has an infrared laser (780 nm). A perfect black absorbs all light or radiation, so always works just as good.
Of course to have any effect the light should reflect outside the cd, and the green should absorb any light that otherwise would reflect back in the reciever optics of the cd player. I can not believe that these reflections can be significant compared to the reflections from the lenses, beamsplitter, quarter wave plate in the optical head (and the cd its self) that also take place.
It should be pointed out the laser light for SACD and DVD players is in the visible red spectrum, 650 nm. Also, it's fairly easy to show that the black surface of the CD try is actually rather reflective of the light from a red laser pointer.
Yes, dvd and sacd use red lasers. Did you you ever compare the reflection from a green surface with a black surface?
I've compared Green and Cyan (turquoise) with Black. Seems to depend on shininess of the surface. (Black) flocking paper is quite good as absorber - not perfect but noticeably better than smooth black surface. Green and Cyan inks or paints are excellent, better than the smooth black surface.
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