Spatially corrected full-cubed hyperspectral imager
First Claim
1. A hyperspectral imager comprising:
- an objective lens for producing a focused image at a focal plane;
an array of spectral filters placed at the entrance pupil of the objective lens, each spectral filter element passing a band of light;
a detector array comprising a plurality of multiband detectors, each multiband detector comprising a plurality of detectors;
a micro-lens array comprising a plurality of micro-lenses, positioned between the objective lens and the detector array, each micro-lens of the micro-lens array positioned approximately at the focal plane to produce an image for one multiband detector;
wherein all detectors of one multiband detector receive substantially the same image and each detector of one multiband detector receives light from one element of the array of spectral filters.
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Accused Products
Abstract
A hyperspectral imager that achieves accurate spectral and spatial resolution by using a micro-lens array as a series of field lenses, with each lens distributing a point in the image scene received through an objective lens across an area of a detector array forming a hyperspectral detector super-pixel. Spectral filtering is performed by a spectral filter array positioned at the objective lens so that each sub-pixel within a super-pixel receives light that has been filtered by a bandpass or other type filter and is responsive to a different band of the image spectrum. The micro-lens spatially corrects the focused image point to project the same image scene point onto all sub-pixels within a super-pixel.
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Citations
5 Claims
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1. A hyperspectral imager comprising:
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an objective lens for producing a focused image at a focal plane; an array of spectral filters placed at the entrance pupil of the objective lens, each spectral filter element passing a band of light; a detector array comprising a plurality of multiband detectors, each multiband detector comprising a plurality of detectors; a micro-lens array comprising a plurality of micro-lenses, positioned between the objective lens and the detector array, each micro-lens of the micro-lens array positioned approximately at the focal plane to produce an image for one multiband detector; wherein all detectors of one multiband detector receive substantially the same image and each detector of one multiband detector receives light from one element of the array of spectral filters. - View Dependent Claims (2, 3, 4, 5)
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Specification