Electric field intensity detecting device having a condenser-type antenna and a light modulator
US5210407A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 7, 1992 |
| Grant date | May 11, 1993 |
| Priority date | — |
| Expiry date | May 7, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R29/0885
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus measures the intensity of an electric field with a compact sensor equipped with a light modulater of a Mach-zender interferometer type and a condenser-type antenna. The sensor modulates coherent measuring lights propagated through branched two optical paths according to the voltage induced on the surfaces of plates of a condenser-type antenna of the sensor. The modulated lights are merged and interfered with each other and result in merged light different in intensity from the original measuring light. A waveguide-type optical integrated circuit formed in the sensor calculates the intensity of the merged light having the intensity dependent on the intensity of the magnetic field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.