Optics: measuring and testing – Document pattern analysis or verification
Patent
1999-03-16
1999-12-28
Evans, F. L.
Optics: measuring and testing
Document pattern analysis or verification
356307, 356301, G01J 344, G01N 2165
Patent
active
060088885
ABSTRACT:
The LVARS is a fully instrumental, non-destructive spectroscopic device for the analysis and verification and authentication of the optical and electromagnetic properties (OEMP) of the inks, dyes, thin films, plastics, toners, paper, fixatives, paints, and printing agents used in documents and financial instruments. The instrument is quantitative in nature so as to correlate compositional data (elemental, isotopic, structure) with Raman optical spectra. The LVARS design consists of a computer-controlled spectrometer with a microscope-guided grid head containing the laser excitation source and detector and optics. The spectrometer contains signal processing electronics which sends a stream of data to the computer for analysis and correlation with the library database.
REFERENCES:
patent: 5324567 (1994-06-01), Bratchley et al.
patent: 5751415 (1998-05-01), Smith et al.
"Raman Microscopy of a 13th-Century Illuminated Text", Analytical Chemistry News & Features, Feb. 1, 1998, pp. 99-104.
Foster + Freeman News, 1998/99, pp. 1-8.
Foster + Freeman brochure on FORAM 685. (Undated).
Kirchoff James A.
Lucke Jonathan N.
Nottke Francis A.
Evans F. L.
Gibbons Jon A.
Wizard of Ink & Co.
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