The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 10, 1984
Filed:
Apr. 17, 1981
Walter S Carter, Bracknell, GB;
British Aerospace Public Limited Company, London, GB;
Abstract
A magneto-optical phase-modulating device comprising a magneto-optic layer (3) forming part of an optical stack and upon which, in use, light is incident and to which is applied a magnetic field, a layer of magnetic material (6) adjacent the magneto-optic layer (3), and at least two flat, low inductance conductors (9,12) connected in series and disposed one on either side of the layer of magnetic material (6), in use the conductors (9,12) having an electric current applied thereto to provide a magnetic field in the layer of magnetic material (6), which magnetic field is switchable between one direction and the opposite direction by reversing the current in the conductors (9,12) and is of a strength relative to that of the magnetic field applied to the magneto-optic layer (3) such that the latter field is also switched between said one direction and the opposite direction as the field associated with the layer of magnetic material (6) is switched.