The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 02, 2007
Filed:
Jan. 23, 2004
James M. Tedesco, Livonia, MI (US);
Joseph B. Slater, Dexter, MI (US);
Kevin L. Davis, Ann Arbor, MI (US);
Ronald C. Fairchild, Ann Arbor, MI (US);
John W. Baughn, Clinton, MI (US);
James M. Tedesco, Livonia, MI (US);
Joseph B. Slater, Dexter, MI (US);
Kevin L. Davis, Ann Arbor, MI (US);
Ronald C. Fairchild, Ann Arbor, MI (US);
John W. Baughn, Clinton, MI (US);
Kaiser Optical Systems, Ann Arbor, MI (US);
Abstract
A multi-channel, reconfigurable fiber-coupled Raman instrument uses fiber optic switches for laser and calibration light routing to facilitate automated calibration, diagnosis and operational safety. The system allows wavelength axis calibration on all channels; laser wavelength calibration (including multiple and/or backup laser options); fiber coupling optimization; fault detection/diagnosis; and CCD camera binning setup. In the preferred embodiment, dedicated calibration channels surround data channels on a 2-dimensional CCD dispersed slit image implemented using a unique cabling architecture. This 'over/under' calibration interpolation approach facilitates quasi-simultaneous or sequential calibration/data acquisitions. CCD binning between sequential calibration and data acquisitions enables higher density multi-channel operation with tilted images based upon a multiplexed grating configuration. A diamond sample is used as a Raman shift reference for laser calibration, preferably in the form of a small disc sampled with an edge-illuminating probe using two unfiltered fibers.