Color camera computed tomography imaging spectrometer for improved spatial-spectral image accuracy
AssigneeCalifornia Institute of Technology
InventorsDaniel Wilson, Gregory Bearman, William Johnson
Life of this patent
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Abstract
Computed tomography imaging spectrometers (“CTIS”s) having color focal plane array detectors are provided. The color FPA detector may comprise a digital color camera including a digital image sensor, such as a Foveon X3® digital image sensor or a Bayer color filter mosaic. In another embodiment, the CTIS includes a pattern imposed either directly on the object scene being imaged or at the field stop aperture. The use of a color FPA detector and the pattern improves the accuracy of the captured spatial and spectral information.
Claims21
An imaging spectrometer for capturing spatial and spectral information from an object scene comprising:
- a color focal plane array detector comprising a color detector adapted to improve accuracy of the captured spatial and spectral information;
- a primary imaging lens;
- a 2D grating disperser;
- a collimating lens;
- and
- a field stop aperture.
An imaging spectrometer for capturing spatial and spectral information from an object scene comprising:
- a color focal plane array detector comprising a color detector adapted to improve accuracy of the captured spatial and spectral information;
- a 2D grating disperser;
- a primary mirror assembly comprising a first concave mirror and second concave mirror;
- and
- a field stop aperture.
A method of capturing spatial and spectral information from an object scene, the method comprising:
- forming an image of the object scene on a field stop aperture;
- transmitting light in the field stop aperture to a collimating lens, wherein the collimating lens collimates the light;
- passing the collimated light through a two-dimensional grating disperser, wherein the two-dimensional grating disperser produces a two dimensional array of diffraction orders of light;
- re-imaging the diffraction orders of light onto a color focal plane array detector using an imaging lens, wherein the color focal plane array detector comprises a color detector adapted to improve accuracy of the captured spatial and spectral information;
- recording the intensity of the light incident on the color focal plane array detector.
Dependencies are inferred from the claim text.