Optics: measuring and testing – By dispersed light spectroscopy – With aperture mask
Patent
1990-01-10
1992-02-25
Evans, F. L.
Optics: measuring and testing
By dispersed light spectroscopy
With aperture mask
356330, G01J 304
Patent
active
050908073
ABSTRACT:
The present invention is an apparatus for forming a spectrally weighted value from received multispectral radiation. The spectral weighting is done optically prior to detection of the received radiation by dispersing the received multispectral radiation into a plurality of wavelength bin areas. This dispersed radiation is then passed through a weighting filter which includes first and second filter elements for each of the wavelength bin areas. The filtered radiation is then converged to corresponding detectors with the spectrally weighted value formed by the difference between the signals of the first and second detectors. A pair of filters, two detectors and a subtracter are employed to produce a generalized weight factor having positive or negative weights. This system can form one or more spectrally weighted values from the radiation from a single pixel, or one spectrally weighted value form the radiation from a plurality of pixels. The addition of a polarization filter permits the formation of spectrally weighted values for various polarizations of a single pixel.
REFERENCES:
patent: 3314327 (1967-04-01), Killpatrick et al.
patent: 4790654 (1988-12-01), Clarke
Crist et al., "A Physically Based Transformation of Thematic Mapper Data--The T.M. Cap," IEEE Transactions on Geoscience and Remote Sensing, vol. GE-22, #3, May 1984.
Environmental research Institute of Michigan
Evans F. L.
Hantis K. P.
LandOfFree
Real time optical pre-detection processing of multispectral imag does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Real time optical pre-detection processing of multispectral imag, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Real time optical pre-detection processing of multispectral imag will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1889134