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:
Jun. 10, 1986
Filed:
Dec. 19, 1985
Lewis B Browder, Altadena, CA (US);
Datatape Incorporated, Pasadena, CA (US);
Abstract
A Faraday-effect magneto-optic transducer of a rotary form includes first and second optical fibers having adjacent ends aligned with each other for joint rotation along a circular path. Opposing surfaces of a planar element of a magneto-optic material are attached respectively to the adjacent ends of the fibers for rotation therewith. The first fiber is arranged with respect to a light source for scanning an entering beam of polarized light along the circular path, a portion of which is immediately adjacent and substantially parallel to the information-bearing surface of a magnetic storage device, such as magnetic tape. The planar element modulates the entering light according to the magnetization of the region of the storage device adjacent the magneto-optic material. The second optical fiber receives light transmitted through the magneto-optic material, to form a beam of polarized light exiting the transducer, whereby the exiting light is modulated with respect to the entering light because of the Faraday magneto-optic effect.