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:
Mar. 21, 2000
Filed:
Aug. 28, 1998
Walter Heitmann, Gross-Bieberau, DE;
Deutsche Telekom AG, Bonn, DE;
Abstract
An optical connection between optical fibers and an optical window exhibits improved long-term stability and improved measuring accuracy due to substantial transmission constancy. The surface of the optical window is coated with a thin, absorption-free coating of very hard material, thereby substantially improving the scratch resistance. The thickness of the protective coating is sized so that interfering reflection losses caused by differences in refraction indices may be avoided. The hardness of the protective coating is greater than that of the material of the optical window and its optical thickness is small in relation to the operating wavelength. The coating may be applied using ion-based, ion-beam dispersion, or microplasma methods.