Electricity: measuring and testing – Magnetic – Magnetometers
Patent
1986-06-24
1989-03-14
Strecker, Gerard R.
Electricity: measuring and testing
Magnetic
Magnetometers
324 96, 350376, 350406, G01R 33032, G02F 109, G02B 530
Patent
active
048127671
ABSTRACT:
An anomalously strong magneto-optical effect of a magnetic fluid thin film is obtainable when an external magnetic field is applied in the perpendicular direction to the propagation of the light beam, thus making the magnetic fluid thin film possess a birefringent property. In consequence thereof, a phase difference appears between the two modes of the light which pass through the magnetic fluid thin film. The phase difference is a single valued function of the magnetic field applied to the thin film. An apparatus using such an effect (hereinafter referred to as Magnetic Fluid Thin Film's Anomalous Pseudo-Cotton-Mouton Effect) is primarily for detecting a magnetic field and can be used as a magnetic field sensor, a transformer, an apparatus for controlling a light intensity containing an optical shutter and an optical modulator, an optically bistable apparatus, a memory for an optical computer and a light intensity stabilizer for lasers and an optical amplifier.
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