Photometric instrument with optical fibers for analyzing remote samples
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United States of America Patent
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Jun 27, 1995
Grant Date -
N/A
app pub date -
Jul 15, 1993
filing date -
Jul 15, 1993
priority date (Note) -
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status (Latency Note)
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Abstract
In a spectrophotometer, each of a plurality of source optical fibers is selectively receptive of source radiation and carries the radiation to a corresponding selected liquid sample cell. A corresponding return optical fiber returns transmitted radiation from the sample to a polychromator. For selecting a sample, a switching member holds exposed ends of the optical fibers on a circle coaxial with an axle for rotating to selected positions. Respective optical trains in the instrument direct radiation into and out of the selected pair of fibers. The diameter of a source aperture, the spacing of the aperture from the radiation source, and the source area define a source etendue. The optical fibers have a fiber etendue substantially the same as the source etendue.
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