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:
Sep. 21, 1993
Filed:
Nov. 01, 1991
Robert V Burch, Madison, WI (US);
Nicolet Instrument Corporation, Madison, WI (US);
Abstract
A spectrometer for Raman spectrometry has a radiation source which provides a beam of radiation directed onto a sample, sample collection optics which directs the radiation from the sample as an input beam into an interferometer, the output beam of the interferometer being focused onto a detector, and filters interposed in the input and output beams of the interferometer. The filters are preferably holographic notch filters. Optical subtraction occurring in the interferometer as a result of the filters provides enhanced attenuation of the Rayleigh line of the reflected radiation while substantially passing the Raman lines, with the two filters achieving attenuation of the Rayleigh line equivalent to that obtained by several comparable filters stacked together.