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:
Feb. 26, 1991
Filed:
Aug. 05, 1988
Mark L Wilson, Vadnis Heights, MN (US);
Unisys Corporation, Blue Bell, PA (US);
Abstract
An optical switch for coupling one of a plurality of input light sources to one of a plurality of output terminals is comprised of a Bragg cell array acoustically excited in accordance with one or more preselected control frequencies from a selectable source of such frequencies. The beam deflection is proportional to the applied radio frequency. A scan lens is positioned to intercept the deflected beams and to focus the beams into a plane for imaging upon a linear array of optical output fibers. By choice of the control frequency any combination of input and output fiber optic lines may be optically coupled without requiring active sensors. Sufficient diffraction is provided by the Bragg cell in combination with the scan lens to minimize cross-talk and insertion loss.