Coronagraphic Notch Filter for Raman Spectroscopy
NASA's Jet Propulsion Laboratory, Pasadena, California
Sunday, August 01 2004
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Design could be optimized for attenuating pump light and transmitting Raman-scattered light.
A modified coronagraph has been proposed as a prototype of improved notch filters in Raman spectrometers. Corona-graphic notch filters could offer alternatives to both (1) the large and expensive double or triple monochromators in older Raman spectrometers and (2) holographic notch filters, which are less expensive but are subject to environmental degradation as well as to limitations of geometry and spectral range.
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