Magnetic field and electrical current visualization system
US6934068B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 10, 2004 |
| Grant date | Aug 23, 2005 |
| Priority date | — |
| Expiry date | Feb 10, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/09
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Magnetic field and/or electrical current imaging systems utilizing magneto-optical indicator films (MOIF) based on magneto-optical material with in-plane single easy axis type of magnetic anisotropy provide improved magnetic field resolution and dynamic range with the use of specific illumination conditions. Methods that provide the two-dimensional distribution of the external magnetic field vectors are disclosed together with the methods of extraction of said information. The visualizing systems offer high spatial resolution and/or high magnetic field resolution combined with fast sampling rates and the capability of performing large-area imaging. The applications of such systems include nondestructive testing and damage assessment in metal structures via magnetic materials or induced currents, integrated circuit testing and quality control, general magnetic material and thin film research, permanent magnet quality control, superconductor research and many others.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.