Wide Range Sensing of Liquid Refractive Index

Traditionally, the measurement of liquid refractive index has involved relatively bulky equipment such as the Abbe refractometer and total internal reflection to define refractive Index to 10-4 refractive Index units. This paper describes a new refractive Index sensor which is approximately .2×.5×.5 mm in size and can be used with an optical fiber to sense the refractive Index of liquids using less than 0.01 microliter samples.