Optics: measuring and testing – By dispersed light spectroscopy – With sample excitation
Patent
1998-03-06
2000-09-26
Font, Frank G.
Optics: measuring and testing
By dispersed light spectroscopy
With sample excitation
356318, 356301, G01J 330, G01J 300
Patent
active
061249289
ABSTRACT:
In an optical measurement system of the type wherein a source of excitation radiation is directed along an excitation path to stimulate an optical emission from a sample along a collection path, the use of polarization-based beam splitting enables optical shutters to control selective polarization of the excitation and/or collection paths while maximizing overall optical alignment accuracy. In a preferred embodiment, polarization-based beam-splitting optics are disposed in one or both of the excitation and collection paths to divide that path into two orthogonally polarized paths, and a controllable optical blocking element is disposed in at least one of the orthogonally polarized paths, such that control of over transmission of that path results in control over polarization. Each polarization-based beam-splitting optic preferably takes the form of an integrated polarizing beam-splitter, and four such elements are used, two in each of the excitation and collection paths, to selectively establish four polarization states. The invention is useful in any type of induced emission arrangement, including Raman and fluorescence detection.
REFERENCES:
patent: 3631254 (1971-12-01), Covault
patent: 3697180 (1972-10-01), Mori
patent: 3817634 (1974-06-01), Barron et al.
patent: 5116121 (1992-05-01), Knoll et al.
patent: 5202744 (1993-04-01), Louis
patent: 5418797 (1995-05-01), Bashkansky et al.
patent: 5638172 (1997-06-01), Alsmeyer et al.
patent: 5672880 (1997-09-01), Kain
patent: 5754289 (1998-05-01), Ozaki et al.
Melles Griot 1995/96 Catalog, pp. 12-22 to 12-23.
Font Frank G.
Kaiser Optical Systems, Inc.
Smith Zandra V.
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