Bismuth-substituted rare earth iron garnet single crystal film
US5925474A · kind A · utility
3Cited by
5References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 29, 1997 |
| Grant date | Jul 20, 1999 |
| Priority date | — |
| Expiry date | Sep 29, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/26
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A BIG film for a Faraday rotator is provided with a first antireflection film on the front surface and a second antireflection on the back surface. The first and second antireflection films differ in material or thickness and therefore differ in color. The difference in color makes it possible to visually distinguish the front surface from the back surface. The antireflection films of different colors may be applied to a BIG film with a square hysteresis which retains its magnetic saturation after an external magnetic field has been removed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.