Photometric instrument with optical fibers for analyzing remote

Details Photometric instrument with optical fibers for analyzing remote Photometric instrument with optical fibers for analyzing remote

1993-07-15

1995-06-27

Gonzalez, Frank

Optical waveguides

With optical coupler

Switch

385 17, 385 20, 385 25, G02B 626

Patent

active

054286964

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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