Objective lens for an endoscope

US11089948B2 · kind B2 · utility

Assignee

• avateramedical GmbH · DE

Inventors

• Ali Khettal · Berlin, DE
• Fabian Weise · Berlin, DE

Key dates

• Filing date: Jun 14, 2018
• Grant date: Aug 17, 2021
• Expiry date: Sep 7, 2039

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B13/0095
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

An objective lens for an endoscope has an object-side lens element including a plane-convex rod lens and an image-side lens element including a biconvex lens arranged at the image-side end of the objective lens. The object-side lens element includes a plane-convex first lens and a biconcave second lens which form a front lens and are arranged in this order on the object side of the plane-convex rod lens forming a third lens. As viewed from the object side, the image-side lens element includes a biconvex fourth lens, a concave-plane fifth lens and a biconcave sixth lens which are arranged in this order on the object side of the biconvex lens that is arranged at the image-side end of the objective lens and forms a seventh lens.