Electro-optical voltage detector
US4855591A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 8, 1988 |
| Grant date | Aug 8, 1989 |
| Priority date | — |
| Expiry date | Jun 8, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R1/071
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A voltage detector detects a voltage developing in a selected area of an object such as an integrated circuit by utilizing an electro-optic material equipped in an optical probe. A change in refractive index of the electro-optic material which is caused by the voltage in the object, is detected as a change of polarization of a light beam passing through the electro-optic material. In order to stably trigger a streak camera, the first reference light split before entering the electro-optic material and the second reference light split after emerging from the electro-optic material are used in the form of the difference in intensity between the two reference light beams for generating a trigger signal supplied to the streak camera.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.