HVD stands for Holographic Versatile Disc. It is known as the next generation product in optical discs technology. Once produced, HVD would have around 3.9 terabytes of storage capacity and a 1 GB/s data transfer rate. These specifications are considerably higher than those of HD DVD (High Definition Digital Versatile Disc) and the Blu-Ray disc. HVDs can also store 60,000 bits per pulse. This is a huge improvement from traditional CDs that can save only 1 bit per pulse.
HVD uses a set of advanced technologies and procedures. It uses collinear holography, a technique wherein a blue-green laser ray and a red laser ray are paralleled to form one beam. The blue-green laser ray reads data on the holographic surface. The red laser ray serves as the reference beam and it also reads information on the aluminum top of the disc.
HVDs have dichroic mirrors located between the disc’s layers. These mirrors reflect the blue-green laser ray. In this procedure, the red laser ray would be able to pass through and access the information it needs to read. Through this technique, the interference problem caused by the blue-green ray’s refraction is eliminated. The said problem is common in most holographic devices.
Upon its full commercial release, HVD is expected to cost around $100 to $120 per disc. HVD readers would cost around $10,000 to $15,000. These prices would, however, vary depending on the competing technologies and overall public reception. The initial markets which are targeted by the HVD technology are government agencies, document libraries, and large businesses.