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:
May. 16, 1989
Filed:
Oct. 24, 1988
Applicant:
Inventor:
Holger Karstensen, Munich, DE;
Assignee:
Siemens Aktiengesellschaft, Berlin and Munich, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ; G02B / ;
U.S. Cl.
CPC ...
350 9618 ; 350 9615 ; 350 9617 ; 350416 ;
Abstract
A spherical planoconvex lens for optically coupling a semiconductor laser to an optical waveguide characterized by a thickness of the lens from a planar surface to a vertex of the spherical convex lens surface being greater than the radius of the spherical convex surface but small enough that a focal point of the lens on a laser side lies outside of the lens at a small distance from the planar lens surface. The lens can be formed of either silicon or germanium and has a higher coupling efficiency than is achieved with previously known hemispherical planoconvex lenses of silicon.