The most common types are CD, DVD and Blu-ray. As removable media, optical discs superseded the earlier magnetic disk cartridges because they weigh less, have higher capacities and are not subject ...

Everyone knows optical disc formats like CD and DVD ... which at 480x480 or 480x576 depending on your region, is twice the image quality of VCDs, but at a massive decrease in running time.

Using 3D storage techniques, scientists at the University of Shanghai for Science and Technology developed an optical disk capable of accommodating 1.6 petabits of data (that's 1.6 million gigabits).

The data-transfer-rate of an optical disk is determined by the disk's rotational speed. Conventional CDs and DVDs, which use a 1.2-mm-thick polycarbonate substrate, could break from centrifugal ...