Gail D Massey

US Patent:

44121733, Oct 25, 1983

Filed:

Jan 26, 1981

Appl. No.:

6/228147

Inventors:

Gail A. Massey - San Diego CA

Assignee:

The Oregon Graduate Center for Study and Research - Beaverton OR

International Classification:

G01R 2702

US Classification:

324 62

Abstract:

Apparatus using leakage current through a sample to determine resistivity. An optically active material of the type which changes the polarization of a light beam passing therethrough, responsive to an electric field, is placed between a first pair of conducting plates. The sample is placed between a second pair of conducting plates which are in parallel connection with the first pair of plates. A light source transmits light through the material and a light detector detects changes in polarization of the light which emerges from the material. Each pair of plates is charged and the rate of discharge of the plates is monitored by the light detector.