Patent ID: 11894035
Assignee: MICROSOFT TECHNOLOGY LICENSING, LLC
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 12:
13. A holographic data retrieval system comprising:
an emitter system;
at least one detector array for detecting an image;
at least one holographic recording medium;
a reference waveguide network, formed of one or more multimode optical waveguides, the reference waveguide network having an in-coupling region for receiving a reference beam from the emitter system and multiple out-coupling regions respectively optically coupled to corresponding recording regions of the at least one holographic recording medium; and
a controller coupled to at least one of the emitter system and at least one controllable guiding element of the reference waveguide network, the controller configured to control at least one optical characteristic of the reference beam or the at least one guiding element to guide the reference beam to any selected one of the recording regions to be read, thereby creating an output beam, via the reference beam interacting with a pattern stored thereat, for receiving at the detector array for recovering data of the stored pattern from the output beam, wherein different ones of the multiple recording regions may be read from using the same emitter system, by changing said at least one optical characteristic of the reference beam or controlling said at least one guiding element of the reference waveguide network, whilst the multiple out-coupling regions of the reference waveguide network remain at fixed locations relative to the corresponding recording regions of the holographic recording medium, wherein the controller is configured to vary an angle of the reference beam for reading different patterns stored at the same selected recording region, the multimode optical waveguides of the reference waveguide network for carrying a reference beam at any one of multiple possible angles.