Optics: measuring and testing – By dispersed light spectroscopy – With synchronized spectrum repetitive scanning
Patent
1995-05-11
1996-02-06
Evans, F. L.
Optics: measuring and testing
By dispersed light spectroscopy
With synchronized spectrum repetitive scanning
356328, G01J 306, G01J 320, G01J 310
Patent
active
054899800
ABSTRACT:
An apparatus comprising two light sources, a composite detector, a fixed grating, two independent slits and a mask with a multiplicity of slits analyzes the spectral composition of samples rapidly and accurately and can transmit such information to other locations by modem. A first light source produces a spectrum with broad spectral range, a second light source produces a spectrum with multiple sharp spectral features. The first and second light sources are used to produce a sample spectrum and a reference spectrum respectively. A portion of the light from each of the two sources is used to calibrate the intensity of the instrument at each wavelength measurement. Rapid scanning is achieved by continuous multiplexing of each wavelength of light to the detector using a rotating mask with a multiplicity of slits. Continuous wavelength calibration is achieved by using the reference spectrum to encode a wavelength scale as spectrum is acquired. The spectral data can be transmitted by the said apparatus to other locations by modem. The said modem enables a multiplicity of the said apparatus to be used at various locations to perform a common analysis function. For example, a city wide medical network of analyzers may be set up to communicate with a central data base, where analyses on clinical assays may be performed by powerful dedicated computers. In another example, a network of the said apparatus may be set up in an integrated manufacturing environment such as a tobacco manufacturing plant or pharmaceutical manufacturing plant, to accumulate data at several points in the manufacturing process. The apparatus, may be used to rapidly scan and analyze discrete moving samples for composition analyses, density determination, moisture determination, color, and surface uniformity.
REFERENCES:
patent: 4191473 (1980-03-01), Hansch
patent: 4441814 (1984-04-01), Buchanan
patent: 4540282 (1985-09-01), Landa et al.
patent: 4669878 (1987-06-01), Meier
patent: 4880752 (1989-11-01), Keck et al.
patent: 4969740 (1990-11-01), Sonobe
patent: 4970054 (1990-11-01), Mori
patent: 4980278 (1990-12-01), Yamada et al.
patent: 4983039 (1991-01-01), Harada et al.
patent: 4989932 (1991-02-01), Landa et al.
patent: 5006314 (1991-04-01), Gourley et al.
patent: 5020909 (1991-06-01), Landa
patent: 5044747 (1991-09-01), Anthony
patent: 5044755 (1991-09-01), Landa et al.
patent: 5047208 (1991-09-01), Schweitzer et al.
patent: 5064619 (1991-11-01), Finlan
patent: 5210590 (1993-05-01), Landa et al.
LandOfFree
Apparatus for rapid and accurate analysis of the composition of does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for rapid and accurate analysis of the composition of , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for rapid and accurate analysis of the composition of will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2178416