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

1994-10-18

1996-06-11

Healy, Brian

Optical waveguides

With optical coupler

Input/output coupler

385 12, 385 33, 385 39, 385123, 356 36, 356213, 356233, G02B 610, G01J 100

Patent

active

055264514

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.

REFERENCES:
patent: 4102559 (1978-07-01), Hunzinger
patent: 4431307 (1984-02-01), Suovaniemi
patent: 4626065 (1986-12-01), Mori
patent: 4886356 (1989-12-01), Paradis
patent: 4968148 (1990-12-01), Chow et al.
patent: 4989932 (1991-02-01), Landa et al.
patent: 5056886 (1991-10-01), Hoult
patent: 5064269 (1991-11-01), Rogers et al.
patent: 5077481 (1991-12-01), Hoult
patent: 5212748 (1993-05-01), Curtiss et al.
patent: 5288992 (1994-02-01), Fohl

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