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1TB Blu-Ray Compatible Optical Disc Announced
red_dragon writes "An article on The Register tells the news of an announcement of a new 1TB optical drive and disc that will be backwardly compatible with Blu-ray discs. The technology, developed by Call/Recall in partnership with Nichia, uses a rhodamine-type dye in a 200+-layer recording medium that gives off light when excited by a laser beam, along with a single fluid-filled lens to read multiple layers by varying the amount of fluid to change the focal length. The technology is designed to work with Nichia's blue-violet laser diodes, which are already used in Blu-ray drives."
nope, its most likely layer not laser.
I'd say layer -- having several hundred lasers in a single drive is a sure sign you've jumped the shark.
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That these Blu-ray compatible discs will be primarily used by consumers to store ripped Blu-ray movies.
If someone says he and his monkey have nothing to hide, they almost certainly do.
All right everyone, the old Blu-Ray is obsolete! See how crappy the puny 1080p looks on your pathetic Sony widescreen? It is time for NEW-RAY.
Throw out your entire video library once again and embrace NEW-RAY.
DVDs are beginning to come up short in backups, but Taiyo-Yuden makes high-quality recordable DVD media that should last you at least a couple of decades if kept in reasonable environments (mostly what you would find in a common home). It's a little more expensive, but it's worth it for backups.
You can never go home again... but I guess you can shop there.
Nope.
For a pressed DVD, a master is etched, and is then used to physically press the pits into the substrate. The depth of these pits (1/4 wavelength) causes destructive interference when the beam hits a pit, and constructive interference when it hits a land. (1/4 wavelength in + 1/4 wavelength out = 1/2 wavelength out of phase with the rest of the beam reflecting off the surrounding substrate)
This is pretty much permanent, provided your media doesn't disintegrate.
For a burned DVD, a photosensitive dye is activated by the writing laser. This activated dye simply absorbs the beam that hits a "pit", while the unactivated dye allows the beam to reflect off the substrate behind, when it hits a "land".
Over time, this dye can degrade such that the unactivated dye slowly activates (either spontaneously or in reaction to ambient light), or that the activated dye slowly deactivates for the same reason (much like a photo left in the sun).
One of the reasons that "archive quality" disks are more expensive is that they use a higher quality dye which takes longer to degrade.
I guess we've finally found something that takes more than one disc!
(T>t && O(n)--) == sqrt(666)