Replication of data to holographic medium using holographic master media

A method of replicating holographically recorded data, comprising:

• generating a master reference beam by a light source;
• directing the master reference beam at a holographic master media having holographically recorded data thereon, thereby generating a first object beam;
• directing the first object beam at a holographic copy media through a first optical relay system, disposed between the holographic master media and the holographic copy media;
• generating a copy reference beam by the light source;
• and
• directing a copy reference beam, coherent with the object beam, at the holographic copy media, thereby recording an interference pattern between the object beam and the copy reference beam thereby replicating at least a portion of holographically recorded data,
• wherein the path length difference between the first object beam and the copy reference beam at any point in the holographic copy media at which holograms are copied is substantially within the coherence length of the light source.

A method of recording at least one layer of holographic data within holographic recording media, comprising:

• generating a master reference beam by at least one light source;
• directing a master reference beam at a holographic master media having holographically recorded data thereon or at a master mask media having structural data features thereon, thereby generating a first object beam;
• relaying the first object beam from the holographic master media or master mask media to a first holographic copy media;
• relaying a portion of the first object beam transmitted by the first holographic copy media to a first reflective surface, the first reflective surface reflecting the transmitted portion of the first object beam at the first holographic copy media to generate a first copy reference beam;
• and
• relaying the first copy reference beam to intersect with the first object beam at the holographic copy media, thereby recording an interference pattern between the first copy reference beam and the first object beam and replicating at least a portion of holographically recorded data or mask data,
• wherein the path length difference between the first object beam and the copy reference beam at any point in the holographic copy media at which holograms are copied is substantially within the coherence length of the light source.

An apparatus for replicating holographically recorded data or mask data, comprising:

• means for generating a master reference beam, comprising a light source;
• means for directing the master reference beam at a holographic master media having holographically recorded data thereon or at a master mask media having structural data features thereon, thereby generating a first object beam;
• means for directing the first object beam at a holographic copy media;
• means for generating a copy reference beam;
• and
• means for directing a copy reference beam, coherent with the said object beam, at the holographic copy media so as to intersect the said object beam at the holographic copy media, thereby recording an interference pattern between the object beam and the copy reference beam thereby replicating at least a portion of holographically recorded data or mask data,
• wherein the path length difference between the first object beam and the copy reference beam at any point in the holographic copy media at which holograms are copied is substantially within the coherence length of the light source.

An apparatus for replicating holographically recorded data, comprising:

• a holographic master media having holographically recorded data thereon;
• a holographic copy media;
• a light source
• for generating a master reference beam, incident on the holographic master media, the holographic master media diffracting the master reference beam to provide a first object beam, and
• for generating a copy reference beam, coherent with the first object beam and incident on the holographic copy media;
• and
• a first optical relay system, disposed between the holographic master media and the holographic copy media, for relaying the first object beam from the holographic master media to the holographic copy media, the holographic copy media recording an interference pattern between the first object beam and the copy reference beam, thereby replicating at least a portion of holographically recorded data,
• wherein the angle of incidence θm of the master reference beam onto the holographic master media and the angle of incidence θn of the copy reference beam onto the holographic copy media can be varied independently.