Optical filter device, in particular for microscopes

摘要

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.

主权项

1. An optical filter device comprising:
a first polarizing beamsplitter; a first achromatic polarization modulator; and a first dichroic mirror; wherein the first polarization modulator is arranged optically between a first input/output of the first polarizing beamsplitter and the first dichroic mirror; and wherein the first polarization modulator is constructed in such a way that it rotates by 90° a polarization direction of light which a) exits the first polarizing beamsplitter at the first input/output, b) traverses the first polarization modulator, c) is reflected by the first dichroic mirror, and d) again traverses the first polarization modulator.