Revolving nose piece for optical components and process for adjusting the number of revolutions thereof

US4961636A · kind A · utility

Assignee

• Ernst Leitz Wetzlar, GmbH · DE

Inventors

• Norbert Gaul · Solms, DE
• Guenter Reinheimer · Biebertal, DE
• Peter Weimar

Key dates

• Filing date: Nov 9, 1988
• Grant date: Oct 9, 1990
• Expiry date: Nov 9, 2008

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B7/16
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A description is given of a rotating turret device, which has a number of optical components, for example, lenses, condensors, filters and stops, which may be brought into operating position individually in each case. Apart from a motor drive device (1-4), an encoding device (12a-12c; 24a-24c) for the indexing or pre-selection of a specific optical component to be brought into operating position, and locating means (7, 7a; 8) for positioning the optical component in operating position, the rotating device has, in additiion, marking and control means (13; 13a), with the aid of which the speed of the turret can be controlled as a function of its particular relative position. In particular, it is possible with the device described to bring a high-speed motor-driven turret (5) into a set location, there taking place shortly before attainment of this operating position a controlled braking of the rotational speed of the turret (5). Moreover, the microscope turret (5) is decoupled from the motor drive device (1-4), which comprises an electromotor (1) and a tachometer generator (1a), so that the exact attainment of the operating position takes place in a purely mechanical fashion through …