Sunday, January 20, 2008
DVD marking using the DVD laser
I'm not alone when I complain that it's hard to tell from the front of a blank CD if it's been used already. I'm sure it can't be that hard to make the laser in the DVD reader zap a specific dot on the disc (perhaps with a small, thin, fragile coating) that renders the disc "used" or pristine. Maybe it goes just on the inside rim of the disc, perhaps zapping a stutter pattern around the inner rim as the marker. A new DVD reader/writer might be required, but as long as you're at it, make the laser be able to vary in intensity and be able to use a special disc that lets you print out text on the disc as well. Heck, build a new DVD reader that also is a printer for the thing.