Incident light illumination instrument for selective light and dark field illumination

US4329014A · kind A · utility

Assignee

• Ernst Leitz Wetzlar, GmbH · DE

Inventors

• Gunter Reinheimer · Biebertal, DE
• Norbert Gaul · Solms, DE

Key dates

• Filing date: Jun 13, 1980
• Grant date: May 11, 1982
• Expiry date: Jun 13, 2000

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B21/082
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

An incident light illumination apparatus for generating light and dark field illumination along an optical axis. The illumination apparatus is coupled to a stage arm of a microscope and a microscope tube is coupled to the illumination apparatus. An illumination stub (7) is located in the illumination apparatus along the optical axis between a light source (8) and an optical deflecting element (11). An aperture (13) passes through the stub from side-to-side for the interchangeable insertion of an insertion module (14,15). This insertion module contains at least two functional groups (I,II; III,II) which can be sequentially placed into the optical axis (9) and the functional groups consist of light attenuating (25) and/or light bounding (19,20,23,24,27) optical components, and additional means (28,29) for pivoting a center stop (30) into the optical axis (9).