1 天津大学 精密测试技术与仪器国家重点实验室, 天津 30007
2 天津大学 精密测试技术与仪器国家重点实验室, 天津 300072
为了获得油品在太赫兹波段的衰减全内反射光谱, 实现对油品的在线检测, 利用光的折射定律, 对太赫兹衰减全内反射系统中的核心部件——衰减全内反射棱镜进行了设计和实验。设计了单次反射棱镜, 根据不同物质对太赫兹波的吸收程度不同, 将单次反射棱镜用于太赫兹衰减全内反射系统, 并进行了水和成品油的测试实验, 取得了样品的光谱数据;进一步设计了多次反射棱镜, 以增加油品对太赫兹的吸收, 并对其进行了光学仿真。结果表明, 经过单次全内反射, 油品对太赫兹的吸收非常有限, 无法实现对成品油的检测。该研究对下一步的油品检测是有帮助的。
光学器件 衰减全内反射棱镜 太赫兹衰减全内反射光谱 油品检测 optical devices attenuated total internal reflection prism terahertz attenuated total internal reflection spe oil detection
Author Affiliations
Abstract
College of Information, Guangdong Ocean University, Zhanjiang 5240252College of Science, University of Shanghai for Science and Technology, Shanghai 200093
Attenuated total reflection (ATR) ratio is usually utilized to study the properties of surface plasmon resonance (SPR) sensors. The relationship between normalized light intensity and ATR ratio is investigated, and a modification coefficient is put forward to describe the relationship. A mathematical expression is built up for the coefficient based on Fresnel principle. The result shows that the ATR ratio, which cannot be measured directly in experiments, can be determined with the coefficient and the normalized intensity of light. The characteristic of the coefficient is also discussed.
表面等离子共振 衰减全内反射 归一化光强 偏振光 130.6010 Sensors 120.0120 Instrumentation, measurement, and metrology 230.0230 Optical devices Chinese Optics Letters
2008, 6(1): 0132
