LIQUID ANALYZING PRISM UNIT WITH INFRARED RAY FEEDING INFRARED FIBER

摘要

PROBLEM TO BE SOLVED: To provide a prism unit capable of surely receiving and radiating infrared rays in spite of being a small attenuation total reflection(ATR) prism. SOLUTION: This prism unit 22 having an ATR prism 51 reflecting the fed infrared rays on the surface of a liquid with which the prism 51 is in contact, is provided with a feeding infrared fiber 24 feeding infrared rays to the ATR prism 51 and a receiving infrared fiber 25 receiving the reflected infrared rays. When the infrared rays from a light source are transmitted by the feeding infrared fiber 24 and cast on a small prism from the feeding infrared fiber 24, the infrared rays are surely fed to the ATR prism 51 from a small specific point on the prism. The infrared rays reflected on the boundary surface F are surely extracted from the specific point of the ATR prism 51 by the receiving infrared fiber 25. The prism unit 22 can be enhanced in the constituent analysis accuracy and measurement accuracy of a liquid analyzer.