Patent ID: 7084649
Filing Date: 2006-08-01
Classification: G01R

Abstract:
1. A method of measuring a three-dimensional distribution of an electric field in a direction of separation from an object to be measured, comprising the steps of; making a first measurement using a plurality of electric field sensors for electro-optic sampling, each of sensors comprising an electro-optic crystal layer, a light-reflection layer that is in close contact with the electro-optic crystal layer and a separation layer that is formed of a material identical to that of the electro-optic crystal layer and is in close contact with the reflection layer to separate the reflection layer from the object to be measured, in which electric field strength at a predetermined point is measured using a first electric field sensor having a first electro-optic crystal layer and a first separation layer; and making a second measurement in which electric field strength at the predetermined point is measured using a second field sensor having a second electro-optic crystal layer and a second separation layer, wherein the second measurement is made satisfying conditions that the first electro-optic crystal layer and the second electro-optic crystal layer are formed of a same material, that a sum thickness of the first electro-optic crystal layer and the first separation layer equals a sum thickness of the second electro-optic crystal layer and the second separation layer, and that the first separation layer and second separation layer have different thicknesses.