Optics: measuring and testing – By polarized light examination – With birefringent element
Patent
1993-11-18
1995-06-20
Turner, Samuel A.
Optics: measuring and testing
By polarized light examination
With birefringent element
356354, 356128, G01B 902
Patent
active
054265053
ABSTRACT:
An interferometric apparatus for monitoring changes of the refractive index of An interferometri1capillary tubes comprising a source of coherent light, which is arranged with respect to a capillary tube which is part of a capillary liquid chromatographic system or a capillary electrophoretic system, such that the coherent light beam strikes the capillary tube about perpendicular to its longitudinal extension. In the forward direction of the coherent light beam, behind the capillary tube, the apparatus comprises a photoelectric detector for monitoring a resulting interference fringe pattern and the shifts thereof, which is connected to an evaluation electronics. Between the light source and the capillary tube there is arranged a beam splitting optical element for generating a converging probe beam, which travels along a probe beam axis and strikes the capillary tube at its bore, and a converging reference beam, which travels along a reference beam axis, that extends generally parallel to the probe beam axis and is located in close vicinity to the probe beam axis, and which does not strike the capillary bore.
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Bruno Alfredo E.
Geiser Martial
Herzig Hans P.
Krattiger Beat
Ciba-Geigy Corporation
Dohmann George R.
Turner Samuel A.
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