Originally Posted by SoundChex
Sorry if I am being dense, but I can't tell whether your answer was "YES, there is an existing|anticipated technology capable of reproducing prerecorded movies on a 1 TB next generation optical disc
" or "NO, there is not currently some existing|anticipated technology capable of reproducing prerecorded movies on a 1 TB next generation optical disc
"...?!To date, all the 8K4K disc material from NHK (and others) I recall reading seems to have been related to recordable media, and not prerecorded discs as would be required for retail movie sales.
Yes, the technology does exist. You need a recordable format, before you develop a ROM format. I try to explain it the best that I can. To make a ROM, then you still have a recording layer. So here is a paper that shows detailed on information on how to make Blu-ray BD-ROM. Nice photos in page 10.http://www.blu-raydisc.com/Assets/Downloadablefile/BD-ROM_physical_format_specifications-18327.pdf
(That specification doesn't show you everything)
I constantly see posts on BD-ROM being pressed, but has anyone in this thread ever worked with plastic injection molding or understand anything about manufacturing? Around 25 years ago, I worked in Tool & Die Apprenticeship. I know lot of details on how to build plastic injection molds, I can see the substrates being built with a mold, but not the recording layer. Anyway, here is a few articles from Panasonic.
(Pansonic leaves out the process for the Recording layer in the link below). (i found the patent on the BDROM manufacturing - a write-once optical disk to which information is written with a violet laser beam), an optical recording medium, and a sputtering target for forming the recording layer of an optical recording medium.http://panasonic.net/blu-ray/technology/branch/process/
What is this important? In the IEEE paper, "Terabyte Holographic Recording with Monocular Architecture" The format is very similar in design to Bluray. Although, Hitachi developed a different recording method - "Angular-multiplexing holographic data storage system is well known for its abilities of “Fast transfer rates” and “High density recording”." Then Hitachi changed the recording layer. (In the past, you had layers to achieve more storage space. Layers can be inefficient, so you want to improve the process and reduce cost.).
Here is the paragraph from the paper regarding the recording layer. "The holographic recording media comprises a photopolymer recording layer of 1.5 mm thickness sandwiched between the first and second glass substrates of 0.1 mm and 1.0 mm thickness, respectively, with AR coating for 405 nm. Generally photopolymer system having high M/# (storage capacity) shows large recording-induced shrinkage of photopolymer layer, causing hologram angular change and low SNR of recorded data. We have designed a new photopolymer system achieving both high storage capacity and low recording-induced shrinkage simultaneously. The shrinkage of 0.1% was evaluated from the Bragg detuning  (deviation from the original recording position) measured by a typical plane wave tester."
Anyway, these papers are hard to understand, but they achieved 1TB holographic disk. The paper was published in 2012, but typically the papers are few years old.
Here is their briefing on the 500Gb disc in 2009. http://www.inphase-tech.com/downloads/pdf/technology/ODS2009_high_density_ver20090507.pdf
Well, the briefing says it is for consumer....Oh, Hitachi has patent on this technology as well. The recording method. The briefing has lot of the photos that are in the paper.Edited by Nitro67 - 10/11/12 at 7:32pm