| US 7,515,260 B2 | ||
| Chemometric analyzer with a spatial radiation modulator having a plurality of radiation filters | ||
| Thomas W. Hagler, Grass Valley, Calif. (US) | ||
| Assigned to Guided Wave Inc, Rancho Cordova, Calif. (US) | ||
| Filed on Oct. 26, 2007, as Appl. No. 11/925,076. | ||
| Application 11/925076 is a division of application No. 11/265874, filed on Nov. 02, 2005. | ||
| Application 11/265874 is a division of application No. 10/384374, filed on Mar. 06, 2003, granted, now 6,995,840, filed on Feb. 07, 2006. | ||
| Claims priority of provisional application 60/361967, filed on Mar. 06, 2002. | ||
| Claims priority of provisional application 60/413424, filed on Sep. 25, 2002. | ||
| Prior Publication US 2008/0218752 A1, Sep. 11, 2008 | ||
| Int. Cl. G01J 3/04 (2006.01) | ||
| U.S. Cl. 356—310 [359/238] | 4 Claims |
| 1. A chemometric analyzer for analyzing a plurality of analytes, comprising:
at least one source providing radiation having at least two selected spectral components;
first optics dispersing the radiation having the at least two selected spectral components to form an image onto an encoding
plane, said image dispersed by wavelength along an encoding axis substantially according to a dispersion function;
a spatial radiation modulator rotated about a rotation axis and positioned in said plane so that said encoding axis is substantially
along a radial axis, said modulator having at least two radiation filters at different radii from said rotation axis, each
of the filters modulating the intensities of a corresponding spectral component in the radiation, to provide an encoded beam
comprising at least two encoded components as said modulator is rotated about said rotation axis, each of said filters having
a radial position and a radial width substantially corresponding to a center wavelength and bandwidth of the corresponding
spectral component, wherein the radial positions and radial widths of said filters are functions of the spectral properties
of said analytes and said dispersion function;
a detector;
second optics directing said encoded beam onto said detector, causing the detector to provide an output; and
a computer analyzing signals generated by said detector in response to said encoded beam to determine presence of one or more
of said analytes.
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