Patent ID: 8154975

Claim:
A method of recording data in a holographic disk, the method comprising: emitting a plurality of signal beams from a first set of optical components towards a first side of the holographic disk; emitting a plurality of reference beams from a second set of optical components towards a second side of the holographic disk; determining whether the plurality of signal beam spots is aligned in the plurality of target data tracks in a target layer of the holographic disk; determining whether each reference beam in the plurality of reference beams substantially overlaps with a corresponding signal beam in the plurality of signal beams to form a plurality of illumination spots during the recording of the holographic disk; adjusting one or more of the first set of optical components when one or more of the plurality of signal beams is determined to not align in the plurality of target data tracks in a target layer of the holographic disk; and adjusting one or more of the second set of optical components when one or more of the plurality of reference beams is determined to not substantially overlap with the corresponding signal beam in the plurality of signal beams to form a plurality of illumination spots.