Brewster's angle flow cell for cavity ring-down spectroscopy

Details Brewster's angle flow cell for cavity ring-down spectroscopy Brewster's angle flow cell for cavity ring-down spectroscopy

2006-06-20

2006-06-20

Toatley, Jr., Gregory J. (Department: 2877)

Optics: measuring and testing

For light transmission or absorption

Of fluent material

Reexamination Certificate

active

07064836

ABSTRACT:
A container to be positioned in a ring-down optical cavity for containing a sample includes an outer surface having opposing first and second outer faces and an inner surface forming a void for containing the sample and having opposing first and second inner faces. The container may include a first portion forming the first outer face having a second index of refraction and a second portion forming the second outer face having a third index of refraction. The container may be placed in an optical cavity including a medium. The first and second outer faces of the outer surface and the first and second inner faces of the inner surface are oriented so that the cavity-to-container interfaces and the container-to-sample interfaces of the container transmit and receive a light beam at an incidence angle approximately equal to the Brewster's angle of the respective interface.

REFERENCES:
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Kate L. Snyder and Richard N. Zare, “Cavity Ring-Down Spectroscopy as a Detector for Liquid Chromatography”, Analytical Chemistry, Jul. 1, 2003, v. 75, No. 13, pp. 3086-3091.

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