Binocular telescope with coupled joint focusing and uncoupled separate focusing

US4989963A · kind A · utility

Assignee

• Leica AG · AT

Inventors

• H. Peter Farnung · Bad Nauheim, DE
• Alfred Hengst · Wetzlar, DE
• Heinz Keiner · Solms, DE

Key dates

• Filing date: Sep 8, 1989
• Grant date: Feb 5, 1991
• Expiry date: Sep 8, 2009

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B23/18
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

The binocular telescope with internal focusing and articulated bridge contains as a joint focusing mechanism two setting rings which can be coupled and which are arranged co-axially on a central axis. In uncoupled condition each setting ring is allocated to a focusing member of a tube, so that focusing can be done independently from each other. In coupled condition both focusing members are shifted jointly by actuation of each of the setting rings. Thus, an unintentional adjustment of the relative positions of the two focusing members is impossible, and focusing of each focusing member in succession is possible.