Client wants to have an interface with buttons to view PDF files on the CDRom side. On the DVD side they
want a couple of videos. Will this setup work in a dual disc environment?
want a couple of videos. Will this setup work in a dual disc environment?
Comment:
RE:
If
a hybrid disc is made with ONE SIDE for CD stuff, then the CD data
layer is seen all the way through, and on the OTHER side of disc that is
1.2mm thick... Hence in a typical CD, one side has nothing, and the
other side has the embossed stuff, and aluminum and the printed
labeling..
BUT the optics of DVDs assumes that the data layer is buried half way inside of the 1.2 mm thick disc.
HENCE the DVD lens normally wants to focus down into the depth that is only 0.6mm away
from its surface...
HENCE.. this goofy disc ((which is totally backward) in its thinking, and THIS godfud would strongly
suggest that NOBODY supports this silly approach.. (why? because with every pricey DVD, the client could include a USB thumb drive to carry 64 gigabytes for free, write?)
just to put out some PDF files in what was supposed to be the CD disc...))
This goofy disc then must have NO printing of typical label information since both sides have to be transparent.
AND, the 0.6mm layer for DVD has to be built on TOP of the 1.2mm thickness to keep that ancient format of CD happy...
HENCE a TOO thick 1.8mm disc. (sure some genius could put the red laser DVD data layer at its standard
0.6mm depth, but with rather transparent data layer coatings so that the CD infra-red light can pass THROUGH the DVD layer and see the CD fully-aluminized layer way over on the other side of the
disc... HENCE a NOT-TOO thick disc that would be OK for the typical
PC drive/drawer (sorta).
IF the disc was 1.8mm thick, or something similar, then its NOT cool for those silly Apple laptops with the way-too-narrow slot that might be just open enough to get the disc INTO the drive, but not with enough extra tolerance to permit the drive to successfully eject the too thick disc everytime... In this result, the DANGER is that
some goober would jam his too-expensive Apple and then, to fix it in a ham-fisted approach using paper clips, he breaks the hidden release lever and then needs to take the too expensive toy back to the store for an expensive factory repair... NAW.. no danger here.
IF some genius figured out how to have a DVD layer (semi transparent to Infra-red color of a CD pickup lens)
done just right, then THAT layer might piss off the mechanisms to see the CD layer since that DVD layer between it and the lens could be cutting down way too much light (aka bad optical S/N)
and hence an unreliable play back. As I remember it, Panasonic invented a tricky solution to their drives that read BOTH CDs and DVDs... Typically that should have TWO lenses with their separate color corrected optical focusing capability.. BUT Panny invented putting a "holgraphic-like" pattern on the surface of their plastic
lens so that it really has two natural focal points because the Hololens surface makes the
plastic lens have the ability to pretend to be the other kind of lens... BUT, all that assumes messing with the efficiency of the light going through all this stuff, and hence the possible unwillingness to guarantee
anything... Holograms are typically NOT that efficient, the best Phase Volume holograms (typically made from photographic film emulsions of very very high resolution) is about 30%-40% efficient. A surface layer
hologram (especially if its transparent) is NOT very good at bending the light (hence permitting one lens to do the work of two).
IF all the client wants to do is to watch videos and then dig out PDFs from some published disc, there is really NO REASON to go to two different types of disc layers on ONE disc... a PDF file folder can be stored on a DVD (since a dual layer DVD surely has enough capacity to store another 700 megs of PDFs.. All that was figured out brilliantly by the Interactual dudes who got acquired into the Sonic megopolis. (and which was built into the tech specs of BDs).
Of course, such a folder of PDF files would mean nothing to a $29 Apex DVD player, but in any computer, after the video is watched a few instructional frames of DVD made in authoring history can tell the end user exactly how to access the EXTRA-COMPUTER-relevant data. when the disc is NOT in auto-play mode.
BUT... IF THIS WAS MY CLIENT,,, I would tell him that he does NOT want CDs hybridized
with DVDs.. RATHER he should pay just a tiny bit MORE, and all his needs could be played back
from a single layered BD disc that was intelligently authored and then played from some cheapo $200
player that Sony will be giving away soon enough..
BUT the optics of DVDs assumes that the data layer is buried half way inside of the 1.2 mm thick disc.
HENCE the DVD lens normally wants to focus down into the depth that is only 0.6mm away
from its surface...
HENCE.. this goofy disc ((which is totally backward) in its thinking, and THIS godfud would strongly
suggest that NOBODY supports this silly approach.. (why? because with every pricey DVD, the client could include a USB thumb drive to carry 64 gigabytes for free, write?)
just to put out some PDF files in what was supposed to be the CD disc...))
This goofy disc then must have NO printing of typical label information since both sides have to be transparent.
AND, the 0.6mm layer for DVD has to be built on TOP of the 1.2mm thickness to keep that ancient format of CD happy...
HENCE a TOO thick 1.8mm disc. (sure some genius could put the red laser DVD data layer at its standard
0.6mm depth, but with rather transparent data layer coatings so that the CD infra-red light can pass THROUGH the DVD layer and see the CD fully-aluminized layer way over on the other side of the
disc... HENCE a NOT-TOO thick disc that would be OK for the typical
PC drive/drawer (sorta).
IF the disc was 1.8mm thick, or something similar, then its NOT cool for those silly Apple laptops with the way-too-narrow slot that might be just open enough to get the disc INTO the drive, but not with enough extra tolerance to permit the drive to successfully eject the too thick disc everytime... In this result, the DANGER is that
some goober would jam his too-expensive Apple and then, to fix it in a ham-fisted approach using paper clips, he breaks the hidden release lever and then needs to take the too expensive toy back to the store for an expensive factory repair... NAW.. no danger here.
IF some genius figured out how to have a DVD layer (semi transparent to Infra-red color of a CD pickup lens)
done just right, then THAT layer might piss off the mechanisms to see the CD layer since that DVD layer between it and the lens could be cutting down way too much light (aka bad optical S/N)
and hence an unreliable play back. As I remember it, Panasonic invented a tricky solution to their drives that read BOTH CDs and DVDs... Typically that should have TWO lenses with their separate color corrected optical focusing capability.. BUT Panny invented putting a "holgraphic-like" pattern on the surface of their plastic
lens so that it really has two natural focal points because the Hololens surface makes the
plastic lens have the ability to pretend to be the other kind of lens... BUT, all that assumes messing with the efficiency of the light going through all this stuff, and hence the possible unwillingness to guarantee
anything... Holograms are typically NOT that efficient, the best Phase Volume holograms (typically made from photographic film emulsions of very very high resolution) is about 30%-40% efficient. A surface layer
hologram (especially if its transparent) is NOT very good at bending the light (hence permitting one lens to do the work of two).
IF all the client wants to do is to watch videos and then dig out PDFs from some published disc, there is really NO REASON to go to two different types of disc layers on ONE disc... a PDF file folder can be stored on a DVD (since a dual layer DVD surely has enough capacity to store another 700 megs of PDFs.. All that was figured out brilliantly by the Interactual dudes who got acquired into the Sonic megopolis. (and which was built into the tech specs of BDs).
Of course, such a folder of PDF files would mean nothing to a $29 Apex DVD player, but in any computer, after the video is watched a few instructional frames of DVD made in authoring history can tell the end user exactly how to access the EXTRA-COMPUTER-relevant data. when the disc is NOT in auto-play mode.
BUT... IF THIS WAS MY CLIENT,,, I would tell him that he does NOT want CDs hybridized
with DVDs.. RATHER he should pay just a tiny bit MORE, and all his needs could be played back
from a single layered BD disc that was intelligently authored and then played from some cheapo $200
player that Sony will be giving away soon enough..
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