Liquid Chromatography Detectors - LC Detectors Based on Refractive Index Measurement > The Fresnel Method > Page 24
Figure 13 A Simple Detector Based on the Fresnel Method of Refractive Index Measurement
A commercial refractive index detector working on the Fresnel principle is shown diagramatically in figure 14. Light from a tungsten lamp passes through an IR filter (to minimize thermal effects) onto a magnifying assembly and prism that also splits the beam into two.
Figure 14 A Diagram of the Optical System of a Refractive Index Detector Operating on the Fresnel Method