Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1991-12-09
1993-07-27
Evans, F. L.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
356328, 2502521, G01J 328
Patent
active
052314618
ABSTRACT:
A method and system for calibrating color filters employed in polychromatic imaging of a subject includes a scanning mirror (28), telescope (30), filters (104), and a detector array (60) employed for both imaging and calibration processes. A bundle (44) of optical fibers is employed for producing a slit-shaped beam of solar rays which are collimated and applied to a diffraction grating plate (54) or prism (72) to produce a set of dispersed solar rays. The dispersion is based on color. In one position of the scanning mirror, rays from a subject (12) to provide an image are directed through the telescope and scanned across the filters (104) and detectors (102). In another position of the scanning mirror, the set of dispersed solar rays is scanned past the filters and the detectors. Imaging data outputted by the detectors is collected for producing an image (112) of the subject. Data of the dispersed rays is collected for calibrating the color filters. A stored reference color profile (92) of each filter is correlated with the calibration data ( 90) to obtain a set of correction terms which are employed for altering the image data to compensate for any drift in the color characteristics of the filters. A broad band detector detects Fraunhofer spectral lines to serve as a reference standard wavelength for alignment of the system.
REFERENCES:
patent: 3864037 (1975-02-01), Johnson
patent: 4678332 (1987-07-01), Rock et al.
patent: 4969740 (1990-11-01), Sonobe
patent: 5040889 (1991-08-01), Keane
Dandekar et al, Applied Optics, vol. 12, No. 4, Apr. 1973, pp. 825-831.
Silvergate Peter R.
Zalewski Edward F.
Denson-Low W. K.
Evans F. L.
Hays R. A.
Hughes Danbury Optical Systems, Inc.
Sales M. W.
LandOfFree
Solar monochromator for filter calibration does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Solar monochromator for filter calibration, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Solar monochromator for filter calibration will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2345514