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US 12,436,032 B2Granted
System, method and apparatus for wide wavelength range imaging with focus and image correction
AssigneeWestboro Photonics
InventorsTimothy Moggridge, Paul Joseph Prior
Life of this patent
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Abstract
A variable focus imaging lens assembly has different, calibrated settings for each of multiple different wavelength ranges. Images are captured for each wavelength range using the different settings, corrected and stacked to form an image data cube. Using multiple wavelength ranges allows a scene or object to be imaged by multispectral imagers, hyperspectral imagers and imaging spectrometers using an overall wide wavelength range.
Claims19
A spectral imaging apparatus comprising:
- a variable focus imaging lens assembly with one or more lenses located on an optical axis, wherein a lens focus of the variable focus imaging lens assembly is changed by adjustment along the optical axis of one or more of the one or more lenses;
- an optics that provides, downstream of the optics, two image focal planes, which are non-coaxial;
- a two-dimensional image sensor array located at one of the image focal planes;
- and
- a computer-readable memory;
- wherein the variable focus imaging lens assembly has, at an object distance:
- a lens focus or zoom setting for a spectral band to image a scene onto the two image focal planes;
- and
- at least one other lens focus or zoom setting each for at least one other spectral band to image the scene onto the two image focal planes;
- wherein all the spectral bands are non-overlapping and all the spectral bands form a spectral range used to image the scene;
- wherein a calibration, comprised of the lens focus or zoom setting for each spectral band, is stored in the computer-readable memory.
8 more elements
Dependencies are inferred from the claim text.