Optics: measuring and testing – By dispersed light spectroscopy – With raman type light scattering
Reexamination Certificate
2011-07-26
2011-07-26
Lauchman, Layla (Department: 2877)
Optics: measuring and testing
By dispersed light spectroscopy
With raman type light scattering
C359S015000
Reexamination Certificate
active
07986407
ABSTRACT:
The invention disclosed here teaches methods to fabricate and utilize a non-dispersive holographic wavelength blocker. The invention enables the observation of the Raman signal near the excitation wavelength (˜9 cm−1) with the compactness of standard thin film/holographic notch filter. The novelty is contacting several individual volume holographic blocking notch filter (VHBF) to form one high optical density blocking filter without creating spurious multiple diffractions that degrade the filter performance. Such ultra-narrow-band VHBF can be used in existing compact Raman instruments and thus will help bring high-end research to a greater number of users at a lower cost.
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Havermeyer Frank
Moser Christophe
Carr & Ferrell LLP
Lauchman Layla
Ondax, Inc.
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