Magneto-optical sensors: physically incorruptible
The highly sensitive magneto-optical sensors from matesy are available with a diameter of up to three inches.
They are used for the:
- Quality inspection and geometric assessment of electrical steel sheets or security features for forensics purposes,
- Surface testing and quantitative analysis of permanent magnets or magnetic particles in composites,
- Study and visualization of soft magnetics or magnetic inks in banknotes or other documents,
- Measurement of permanent magnets up to 1 T or multipole magnets with high fields.
All of these applications place the highest demands on the sensitivity and accuracy of magneto-optical sensors. To produce them, garnet films are deposited on a substrate by liquid phase epitaxy. The film is applied to both sides of the substrate depending on the technology. The films are subjected to further processes to produce the magneto-optical sensor from the built-up garnet film. The finished sensors are coated with a mirror and scratch protection layer and can be directly integrated into a measurement set-up.