Optical imaging system having an expand depth of field

US7209293B2 · kind B2 · utility

Assignee

• Carl Zeiss AG · DE

Inventors

• Gerhard Gaida · Aalen, DE
• Hans-Joachim Miesner · Aalen, DE

Key dates

• Filing date: Aug 23, 2004
• Grant date: Apr 24, 2007
• Expiry date: Feb 28, 2025

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B27/58
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

An optical imaging system, for example, for a surgical microscope (100) has a beam deflecting unit in order to cast light rays out of an object region (112) into an image plane (104) with an optical beam path. An optical phase plate (107) is mounted in the optical beam path. In the optical imaging system, a unit for generating a geometric image of the image plane is provided, for example, an ocular unit (105). The optical phase plate (107) is arranged on the end of the objective lens (101) facing away from the object or is arranged in a region of the optical imaging system in which the beam path is parallel.