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. 04, 2018
Filed:
Feb. 17, 2016
Leica Camera Ag, Wetzlar, DE;
Sigrun Kammans, Herborn, DE;
Leica Camera AG, Wetzlar, DE;
Abstract
The invention describes a focal length extender for a telescopic imaging system with interchangeable viewing eyepieces, including a cylindrical housing, which has a first and a second stop plane which are perpendicular to its cylinder axis in the direction of the light with associated connecting elements to the telescope body and for interchangeable viewing eyepieces and in which the housing has a relay lens arranged between the first stop plane and the second stop plane, wherein the relay lens is divided in two and consists of a first positive, neutral or negative lens element and a further negative lens element, wherein between the first and the further lens element, a beam splitter surface is arranged downstream at an angle to the optical axis of the imaging system and the first and further lens element together with the distance therebetween has an overall negative refractive power.