Hyperspectral imaging systems
First Claim
Patent Images
1. A hyperspectral imaging system, comprising:
- a focal plane array;
a grating-free spectrometer for dividing a field of view into multiple channels as bars and for reimaging the multiple channels as multiple spectral signatures onto the focal plane array, the grating-free spectrometer having;
first optics for collimating electromagnetic energy of an object along an optical axis;
a first prism for dispersing the electromagnetic energy;
a second prism for redirecting the spectra of the first prism along the optical axis; and
second optics for focusing electromagnetic energy along the optical axis from the second prism and onto the focal plane array, anda processor connected with the focal plane array for forming a hyperspectral data cube from the multiple spectral signatures,wherein objects may be identified from the hyperspectral data cube.
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Abstract
Hyperspectral imaging system and methods that may be used for imaging objects in three-dimensions are disclosed. A cylindrical lens array and/or a slit array may be used to re-image and divide a field of view into multiple channels. The multiple channels are dispersed into multiple spectral signatures and observed on a two-dimensional focal plane array in real time. The entire hyperspectral data cube is collected simultaneously.
57 Citations
17 Claims
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1. A hyperspectral imaging system, comprising:
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a focal plane array; a grating-free spectrometer for dividing a field of view into multiple channels as bars and for reimaging the multiple channels as multiple spectral signatures onto the focal plane array, the grating-free spectrometer having; first optics for collimating electromagnetic energy of an object along an optical axis; a first prism for dispersing the electromagnetic energy; a second prism for redirecting the spectra of the first prism along the optical axis; and second optics for focusing electromagnetic energy along the optical axis from the second prism and onto the focal plane array, and a processor connected with the focal plane array for forming a hyperspectral data cube from the multiple spectral signatures, wherein objects may be identified from the hyperspectral data cube. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A multiwavelength imager, comprising:
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imaging optics for forming an image of an object; a focal plane array; at least one micromachined optical (MMO) element array located at or near to an image plane of the imager, for providing a spectral signature for use with the focal plane array; an assembly wheel for positioning multiple MMO element arrays within the imager wherein selection of any one MMO element array provides differing spectral signatures from any other MMO element array of the assembly wheel; and a processor connected with the focal plane array for forming a hyperspectral data cube from the spectral signatures, wherein objects may be identified from the hyperspectral data cube. - View Dependent Claims (14)
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15. A hyperspectral imaging system, comprising:
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imaging optics for forming an image of an object; a focal plane array for detecting spectral signatures; a slit array between the focal plane array and the imaging optics, the slit array selecting parts of the image as bars; a spectrometer for reimaging the bars as multiple spectral signatures onto the focal plane array, the spectrometer having; first optics for collimating electromagnetic energy of an object along an optical axis; a first prism for dispersing the electromagnetic energy; a second prism for redirecting the spectra of the first prism along the optical axis; second optics for focusing electromagnetic energy along the optical axis from the second prism and onto the focal plane array; and a processor connected with the focal plane array for faulting a hyperspectral data cube from the spectral signatures, wherein objects may be identified from the hyperspectral data cube, and wherein the imaging optics are moveable to define which parts of the image are fed as bars into the spectrometer.
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16. A method for forming a dense hyperspectral data cube from a plurality of images, comprising:
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sequentially capturing the plurality of images over a period; sampling each of the plurality of images into multiple channels, each channel focused into a bar; dispersing each bar to form a plurality of spectral signatures; capturing the spectral signatures using a focal plane array; and converting the captured spectral signatures into a hyperspectral data cube; wherein the determined field of view is based upon a velocity and height of the imaging device in relation to the imaged object. - View Dependent Claims (17)
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Specification