Patent ID: 6259244
Filing Date: 2001-07-10
Classification: G01R

Abstract:
An electrooptic voltage waveform measuring method for measuring a voltage applied to an object by employing a light sampling technique using the Pockels effect of an electrooptic crystal, said electrooptic crystal having a first face mounted with a probe and a second face, opposite to the first face, mounted with a reference electrode, said electrooptic voltage waveform measuring method comprising the steps of:applying an A.C. voltage on the reference electrode, as a contact monitor signal;in a state where the A.C. voltage is applied to the reference electrode, moving the probe towards the object, while a voltage measurement employing the light sampling technique is made to measure a voltage amplitude of the A.C. voltage, in synchronism with a timing of the A.C. voltage; andmonitoring a change in a waveform amplitude detected by the probe, and determining a point where an amplitude change of the monitored waveform amplitude stabilizes, as an electrical contact point where the probe contacts the object.