US 12,436,032 B2
System, method and apparatus for wide wavelength range imaging with focus and image correction
Timothy Moggridge, Ottawa (CA); and Paul Joseph Prior, Ottawa (CA)
Assigned to Westboro Photonics Inc., Ottawa (CA)
Filed by WESTBORO PHOTONICS INC., Ottawa (CA)
Filed on Jun. 1, 2022, as Appl. No. 17/830,167.
Application 17/830,167 is a continuation of application No. 16/852,243, filed on Apr. 17, 2020, granted, now 11,359,966.
Claims priority of provisional application 62/835,284, filed on Apr. 17, 2019.
Prior Publication US 2022/0299369 A1, Sep. 22, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G01J 3/40 (2006.01); G01J 3/02 (2006.01); G01J 3/04 (2006.01); G01J 3/28 (2006.01)
CPC G01J 3/40 (2013.01) [G01J 3/0208 (2013.01); G01J 3/04 (2013.01); G01J 3/2803 (2013.01); G01J 3/2823 (2013.01); G01J 2003/2813 (2013.01); G01J 2003/2826 (2013.01)] 19 Claims
OG exemplary drawing
 
1. 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.