Method for single-fiber microscopy using intensity-pattern sampling and optimization-based reconstruction
AssigneeThe Board of Trustees of the Leland Stanford Junior University
InventorsReza Nasiri Mahalati, Ruo Yu Gu, Joseph M. Kahn
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Abstract
A method for imaging an object with resolution that exceeds the number of spatial modes per polarization in a multimode fiber is disclosed. In some embodiments, the object is interrogated with a plurality of non-spot-sized intensity patterns and the optical power reflected by the object is detected for each intensity pattern. The plurality of optical power values is then used in a non-local reconstruction based on an optimization approach to reconstruct an image of the object, where the image has resolution up to four times greater than provided by prior-art multimode fiber-based imaging methods.
Claims20
A method for imaging an object, the method comprising:
- for i=1 through M;
- providing a first intensity pattern, IP1i at a first facet of a multimode optical fiber;
- interrogating the object with the first intensity pattern, IP1i;
- determining the power of a reflected signal, RSi, where RSi includes a portion of IP1i that is reflected from the object;
- and
- assigning a value to element pi based on the power of RSi;
- forming a first vector, p, that includes elements p1 through pM;
- and
- reconstructing a first image of the object by via an optimization-based reconstruction technique that is based on the p.
A method for imaging an object, the method comprising:
- providing a plurality of field patterns at a first facet of a multimode optical fiber;
- interrogating the object with a plurality of intensity patterns, each of the plurality of intensity patterns being generated at a second facet of the multimode optical fiber, wherein each of the plurality of intensity patterns is based on a different field pattern of the plurality thereof;
- detecting a plurality of power values, wherein each of the plurality of power values is based on light reflected from the object for a different intensity pattern of the plurality thereof;
- and
- reconstructing an image of the object based on an optimization-based reconstruction using the plurality of power values.
A method for imaging an object, the method comprising:
- reflecting a first light signal from a spatial light modulator as a second light signal;
- controlling a pixel pattern of a spatial light modulator to generate a plurality of field patterns at a first facet of a multimode optical fiber;
- interrogating the object with a first plurality of intensity patterns, wherein each of the first plurality of intensity patterns is based on a different field pattern of the plurality thereof;
- detecting a plurality of power values, wherein each of the plurality of power values is based on light reflected from the object for a different intensity pattern of the first plurality thereof;
- and
- reconstructing an image of the object based on an optimization-based reconstruction using the plurality of power values.
Dependencies are inferred from the claim text.