Patent ID: 7773275
Filing Date: 2010-08-10
Classification: G11B

Abstract:
1. A holographic drive apparatus comprising a laser light source, a beam splitter, a drive servo mechanism, a processor, a rotatable optical detector, and computer readable program code disposed in a computer readable medium, said computer readable program code being useable with said processor to encode information into a holographic data storage medium, the computer readable program code comprising a series of computer readable program steps to effect: rotating a holographic data storage medium releaseably mounted to said drive servo, wherein said holographic data storage medium comprises an encoded computer generated hologram comprising an alignment pattern; retrieving a stored image comprising said alignment pattern; receiving information; rotating said holographic data storage medium; encoding in said rotating holographic data storage medium a first drive-written hologram comprising said alignment pattern; encoding in said rotating holographic data storage medium one or more data holograms comprising said information; encoding in said rotating holographic data storage medium a second drive-written hologram comprising said alignment pattern; wherein said first drive-written hologram, said one or more data holograms, and said second drive-written hologram define a circular track rotating said holographic data storage medium at an angular rotation φ; providing a reference beam; illuminating the rotated holographic data storage medium with said reference beam to produce a data beam; rotating said optical detector at said angular rotation φ; projecting said data beam onto said rotating optical detector.