Near field optical microscope

A device for the near-field optical measurement of a specimen comprising a probe, a primary mirror (10), which is a concave mirror, and at least two secondary mirror(s) (30), wherein each one of the secondary mirrors (30) is located in an independent optical pathway, whereby each one independent optical pathway starts at the probe and passes the primary mirror (10) and the secondary mirror (30), each one of the secondary mirrors (30) is the first mirror located in the respective independent optical pathway downwards the primary mirror (10), whereby the optical pathways start at the probe and pass the primary mirror (10), and the secondary mirrors (30) are arranged such that the parts of different independent optical pathways that are located downwards the secondary mirrors (30) are not parallel to each other, whereby the independent optical pathways start at the probe and pass the primary mirror (10) and the respective secondary mirror (30).