| 摘要 |
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.
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