Hyperspectral imaging apparatus and methods
AssigneeKing Abdullah University of Science and Technology
InventorsArturo Burguete Lopez, Andrea Fratalocchi, Fedor Getman, Maksim Makarenko, Qizhou Wang
Life of this patent
Estimating the term…
Abstract
Hyperspectral imaging apparatus and methods in which flat optic metasurfaces encode wavelengths of light using their spatial geometry to produce a desired transmission response. The metasurfaces are inversely designed using machine learning techniques to retain in their transmission response information that is sufficient to facilitate substantial reconstruction of the original hyperspectral scene for given applications.
Claims18
A hyperspectral imaging apparatus, the apparatus comprising:
- an encoder layer comprising an i*j array of encoding sub-arrays, each encoding sub-array comprising an m*n array of spectral encoders having a plurality of respective transmission characteristics, the plurality of respective transmission characteristics selected to encode a hyperspectral frequency range in a k-dimensional space, where k is m*n;
- an imaging layer comprising an i*j array of detecting sub-arrays aligned with the i*j array of encoding sub-arrays of the encoder layer, each detecting sub-array comprising an m*n array of photodetectors, each photodetector arranged to detect a respective transmission response of a respective spectral encoder in response to broadband light, wherein the imaging layer outputs an i*j array of pixel responses, each pixel response comprising a pixel vector of m*n transmission responses;
- and
- a processor configured to decode the i*j array of pixel responses into a corresponding i*j array of pixel spectra to produce an output image encompassing the hyperspectral frequency range;
- wherein i, j, m, and n are positive integers.
A hyperspectral imaging method, the method comprising:
- providing an encoder layer comprising an i*j array of encoding sub-arrays, each encoding sub-array comprising an m*n array of spectral encoders having a plurality of respective transmission characteristics, the plurality of respective transmission characteristics selected to encode a hyperspectral frequency range in a k-dimensional space, where k is m*n;
- providing an imaging layer comprising an i*j array of detecting sub-arrays aligned with the i*j array of encoding sub-arrays of the encoder layer, each detecting sub-array comprising an m*n array of photodetectors;
- exposing the encoder layer to capture light;
- detecting, at each photodetector, a respective transmission response of a respective spectral encoder in response to the broadband light;
- outputting an i*j array of pixel responses from the imaging layer, each pixel response comprising a pixel vector of m*n transmission responses;
- and
- decoding the i*j array of pixel responses into a corresponding i*j array of pixel spectra to produce an output image encompassing the hyperspectral frequency range;
- wherein i, j, m, and n are positive integers.
Dependencies are inferred from the claim text.