OPTICAL ROTATION MEASUREMENT DEVICE, POLARIZATION CONVERSION OPTICAL SYSTEM THAT CAN BE USED FOR OPTICAL ROTATION MEASUREMENT, AND METHOD FOR MEASURING OPTICAL ROTATION IN OPTICAL ROTATION MEASUREMENT SYSTEM USING SAID POLARIZATION CONVERSION OPTICAL SYSTEM

摘要

[Problem] To provide an easily used optical rotation measurement device that can measure glucose concentration in vivo or in collected blood at a high accuracy in real time and that can actually be used in medical settings without relying on a reagent. [Solution] The problem is resolved by taking a configuration that is defocused without placing the end surface of an optical fiber at the focal point of a lens by using the result of inserting into an optical fiber ring interference system a nonreciprocal polarization conversion optical system that sandwiches a sample for optical rotation measurement, and in the input/output optical fibers of the nonreciprocal polarization conversion optical system, a large-core-diameter/low-NA single mode optical fiber as an input/output unit is connected to a small-core-diameter/high-NA single mode optical fiber as a transmission unit, with a mode alignment section therebetween.