holographic data recording and retrieval

In holographic information storage, the information to be stored is encoded into a laser signal beam using a spatial light modulator (SLM). The SLM converts binary electronic data into an optical checkerboard configuration of light and dark that can contain nearly a megabyte of data. The ray with encoded information is shone into a translucent optically sensitive material. Inside this material, it intersects with a second beam and the interference configuration imprints a holographic image into the material. When the holographic image is later lit by a laser ray like the reference beam used to create it, then the configuration of overlapping peaks and troughs containing the data is recreated and read. Linked page Prism Solar Technologies also writes about some of this holotech material.

With holographic information storage, complete pages of information can be stored as interference patterns. Numerous of these holographic patterns may be superimposed in the same photosensitive media by changing the angle or wavelength of the laser used to record them in the storage media. In order to retrieve a page of information that has been saved as a hologram in a holotechnology disk, one needs to focus a laser into the disk with the identical angle and wave phase as the source reference beam used to make the page. To restore various pages of information, the laser is shone on the disk at varying angles, but unlike CDs and DVDs, this need not imply that the laser must move. The inclination of the laser beam in the holographic drive (Holodrive) can be bounced off of a reflective panel contrasting with be easily moved. This decreases the amount of mechanical motion and inertia in holodrives as contrasting with conventional disk drives. Further, unlike CDs and digital versatile disks, holodisks do not have to spin in order for the drive to read them. Additional information at Virtual Home Tours .

Focused holotech information on Holographic Tomography .