Inphase Technologies, Inc.

Akonia Holographics LLC

Yunping Yang

Kevin R Curtis

Ernest Y Chuang

Jan Hoogland

According to one aspect and example, a method for recording holographic media and/or holographic master data masks includes recording at least a first hologram or information layer with a first holographic medium (e.g., a 'submaster') and recording at least a second information layer with a second holographic medium (e.g., a second 'submaster'). The first information layer and the second information layer from the first and second holographic media are then sequentially reconstructed and stored with a single holographic master medium (e.g., a &#x201c;master&#x201d;). The holographic master may then be used to record the stored first and second information layers into additional holographic media, for example, into HROM devices or the like.

Methods and systems for recording to holographic storage media

According to one aspect and example, a holographic recording system includes a light source, an object for modulating an object beam from the light source, and a relay system adapted to magnify (positive or negative) the modulated beam (e.g., an image of the object) to an output image. The object may include an SLM operable to modulate the object beam with an information layer comprising a plurality of data pages. The output image is directed to the holographic storage medium, where a reference beam is also directed, to record the resulting interference pattern. Additionally, the relay system converges the output image to an output Fourier plane, which may be disposed within the holographic storage medium. A filter may be placed at an intermediate Fourier plane located prior to the output Fourier plane, and a phase mask may be placed at the position of the output image.

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Los Angeles, CA, United States of America

Yunping Yang