Patent ID: 9465006
Filing Date: 2016-10-11
CPC Classification: G01N

Claim Text:
1. An apparatus for measuring information which is indicative of electromobility in a sample, the apparatus comprising: a light source configured for generating coherent light; a modulator arranged for modulating a first part of the generated light; a sample cell for accommodating the measured sample, configured for applying an electric field to the sample, and arranged for receiving a second part of the generated light for interaction with the sample in the electric field; a modulator monitor configured for monitoring the modulator by detecting interference between a first part of the light coming from the modulator and an unmodulated third part of the generated light; a light detector arranged separately from the modulator monitor and being configured for detecting interference between a second part of light coming from the modulator and light received from the sample cell, wherein the detected signal includes the information which is indicative of electromobility in the sample.