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:
Aug. 04, 1987
Filed:
Dec. 20, 1983
Johannes G Bednorz, Adliswil, CH;
Winfried Denk, Zurich, CH;
Martin Lanz, Adliswil, CH;
Wolfgang D Pohl, Adliswil, CH;
International Business Machines Corporation, Armonk, NY (US);
Abstract
This light waveguide consists of an optically transparent body cut at one end to a sharp tip and polished optically flat at the other end. A metallization layer on its surface is thick enough to be opaque. By pressing the waveguide against a rigid plate the metallization is plastically deformed so as to expose a tiny aperture at the tip of the body through which light can pass. By carefully controlling the deformation of the metallization the diameter of the aperture can be kept between 10 and 500 nm. The waveguide can be incorporated in a semiconductor laser of a read/write head used in an optical storage device.