Multi-purpose optical head probe

Details Multi-purpose optical head probe Multi-purpose optical head probe

1993-08-18

1995-01-10

Evans, F. L.

Optics: measuring and testing

For light transmission or absorption

Of fluent material

356133, 356301, 356440, 2504581, G01N 2141, G01N 2159, G01N 2164, G01N 2165

Patent

active

053812379

ABSTRACT:
An optical probe head for determining the index of refraction of a sample, which is made up of a gradient index lens in contact with the sample, a transmitting optical fiber for inputting radiation into said gradient index lens and a receiving optical fiber. The optical fibers and gradient index lens are aligned so that radiation from the transmitting optical fiber which is reflected from the interface of the gradient index lens and the sample is received by the receiving optical fiber. The probe can, with slight changes, also be used for determining the Raman or fluorescent spectra, for determining the absorption spectrum, and for determining the self-referencing transmission of a sample.

REFERENCES:
patent: 3773424 (1973-11-01), Selgin
patent: 4853547 (1989-08-01), Bach
patent: 4989942 (1991-02-01), Koenigsberg et al.
patent: 5048958 (1991-09-01), Conforti et al.
patent: 5155549 (1992-10-01), Dhadwal
patent: 5194913 (1993-03-01), Myrick et al.
Soref et al. Applied Optics, vol. 23, No. 3, 1 Feb. 1984, pp. 486-491.

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