OPTICAL FIBER TYPE MULTIPLE WAVELENGTH SPECTROMETRIC APPARATUS AND MULTIPLE WAVELENGTH SPECTROMETRIC METHOD USING OPTICAL FIBER

摘要

PROBLEM TO BE SOLVED: To provide a highly sensitive and accurate optical fiber type multiple wavelength spectrometric apparatus of a simple structure and to provide a spectrometric method.

SOLUTION: An optical fiber 20 is provided with both a core and a clad laminated on the periphery of the core and comprises a sensor part SP which enables interaction between part of transmitted light and the outside world. An optical incidence device 15 makes at least two lights of different wavelengths incident onto the optical fiber 20. An optical detector 25 receives light which has been subjected to the interaction with the outside world at a sensor part SP. By the computation of a controller 40, components to be measured are determined on the basis of the difference in light absorbance between an object to be measured present in the outside world and the components to be measured.

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