Modified retrofocus-type wide-angle lens

US8665537B2 · kind B2 · utility

Assignee

• Leica Camera AG · DE

Inventors

• Stefan Roth · Västerås, SE
• Peter Karbe · Wetzlar, DE

Key dates

• Filing date: Jun 27, 2013
• Grant date: Mar 4, 2014
• Expiry date: Jun 27, 2033

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B13/04
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

What is described is a modified retrofocus-type wide-angle lens, with, as seen from the object, a front group (G1) with negative refractive power, a first rear group (Gh1) with positive refractive power displaceable along the optical axis for focusing purposes and a second rear group (Gh2) with positive refractive power facing an image plane.