Systems and methods of imaging polarimetry through metasurface polarization gratings
AssigneePresident and Fellows of Harvard College
InventorsNoah A. Rubin, Paul Chevalier, Federico Capasso
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Abstract
An attachment for an intensity-only sensor in an imaging device includes a polarization-sensitive diffraction grating. The polarization-sensitive diffraction grating is configured to receive incident light from a scene, and to modify the incident light to simultaneously produce a plurality of non-overlapping images of the scene. each of a different diffraction order, on the intensity-only sensor to facilitate full-Stokes imaging polarimetry. The attachment includes a first adjustment mechanism configured to control at least one of: vignetting of the plurality of non-overlapping images on the intensity-only sensor, or an object distance of the imaging device.
Claims7
An imaging device, comprising:
- a polarization-sensitive diffraction grating configured to receive incident light from a scene, and modify the incident light to simultaneously produce a plurality of non- overlapping images of the scene, each of a different diffraction order, on an intensity-only sensor;
- a first adjustment mechanism configured to control at least one of:
- vignetting of the plurality of non-overlapping images on the intensity-only sensor, or an object distance of the imaging device;
- the intensity-only sensor configured to measure an intensity associated with each of the plurality of non-overlapping images;
- and
- a processing circuit comprising a processor and memory, the memory having instructions stored thereon that, when executed by the processor, cause the processing circuit to:
- receive the measured intensities associated with each of the plurality of non-overlapping images;
- and
- analyze the received measured intensities to produce polarization information including a full-Stokes vector corresponding to the incident light.
Dependencies are inferred from the claim text.