Optical filter device, in particular for microscopes

US8988753B2 · kind B2 · utility

Assignee

• Carl Zeiss Microscopy GmbH · DE

Inventors

• Daniel Schwedt · Weimar, DE
• Jakow Konradi · Erfurt, DE

Key dates

• Filing date: Sep 27, 2013
• Grant date: Mar 24, 2015
• Expiry date: Sep 27, 2033

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B26/007
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

An optical filter device having a polarizing beamsplitter, an achromatic polarization manipulator, and at least one dichroic mirror. The polarization manipulator is arranged optically between a first input/output of the polarizing beamsplitter and the dichroic mirror. The polarization manipulator is also constructed in such a way that it effects a 90-degree rotation of a polarization direction of light which a) exits the polarizing beamsplitter at the first input/output, b) traverses the polarization manipulator, c) is reflected by the dichroic mirror, and d) again traverses the polarization manipulator. The optical filter device can also be used as beamsplitter.