Abstract: A reflective microscope objective lens includes a concave mirror system that reflects incoming radiation, a convex mirror in optical communication with the concave mirror system, and a primary concave mirror in optical communication with the convex mirror. The concave mirror system includes a first concave mirror. The primary concave mirror focuses outgoing radiation onto a focal plane wherein the concave mirror system. Characteristically, the convex mirror and the primary concave mirror are arranged to direct light along a non-concentric path.

Abstract: A system is disclosed for detecting a non-linear coherent field induced in a sample volume. The system includes a first source for generating a first electromagnetic field at a first frequency, a second source for generating a second electromagnetic field at a second frequency, first optics for directing the first and second electromagnetic fields toward the sample volume, second optics for directing the first and second electromagnetic fields toward a local oscillator volume, and an interferometer. The interferometer is for interfering a first scattering field that is generated by the interaction of the first and second electromagnetic fields in the sample volume, with a second scattering field that is generated by the interaction of the first and second electromagnetic fields in the local oscillator volume.