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:
Dec. 07, 1976
Filed:
Mar. 17, 1975
David Carl Bullock, Richardson, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A magnetic bubble detector utilizing a thin film optical waveguide. Light is optically coupled into the guide for propagation of linearly polarized light along a first axis thereof. Magnetic bubbles from a memory storage location are moved past the sensor on a second axis transverse the first. A sensor is provided for sensing changes in the polarization mode of the light propagating along the axis of the waveguide. The sensor includes an optical device for coupling light out of the waveguide. The passage of a magnetic bubble along the second axis past the waveguide will modulate the polarized light by the fringing field of the bubble and provide a light output signal from the sensor indicating the passage of each bubble.