发明名称 |
Modulated Fourier Transform Raman fiber-optic spectroscopy |
摘要 |
A modification to a commercial Fourier Transform (FT) Raman spectrometer is presented for the elimination of thermal backgrounds in the FT Raman spectra. The modification involves the use of a mechanical optical chopper to modulate the continuous wave laser, remote collection of the signal via fiber optics, and connection of a dual-phase digital-signal-processor (DSP) lock-in amplifier between the detector and the spectrometer's collection electronics to demodulate and filter the optical signals. The resulting Modulated Fourier Transform Raman Fiber-Optic Spectrometer is capable of completely eliminating thermal backgrounds at temperatures exceeding 300 DEG C.
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申请公布号 |
US6061134(A) |
申请公布日期 |
2000.05.09 |
申请号 |
US19990316176 |
申请日期 |
1999.05.21 |
申请人 |
THE UNITED STATES OF AMERICA AS REPRESENTED BY THE ADMINISTRATOR OF THE NATIONAL AERONAUTICS AND SPACE ADMINISTRATION;OLD DOMINION UNIVERSITY RESEARCH FOUNDATION |
发明人 |
JENSEN, BRIAN J.;COOPER, JOHN B.;WISE, KENT L. |
分类号 |
G01B9/02;G01J3/44;(IPC1-7):G01B9/02 |
主分类号 |
G01B9/02 |
代理机构 |
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