High resolution diffraction requires experimental setups that deliver narrow resolution elements in reciprocal space in two or even three dimensions. The three dimensions of resolution are given by the two-dimensional beam divergence and the monochromaticity of the beam. Together they determine the size and shape of the three dimensional resolution element. The simplest collimation method is by slits. Monochromaticity can be obtained by multilayers or crystal monochromators. As every optical element has a limited efficiency, the use of curved graded multilayer mirrors can provide collimation and monochromaticity with one device.

For these applications Xenocs proposes a range of products based on double curved mirrors for 2D collimation usable in compact diffractometers. These systems are flexible and may be adapted to the requirements of the experiment. For example, the mirror optic may be used alone for an application requiring high flux, or in combination with a crystal optic for an application requiring high resolution.
The Xenocs FOX2D optics can thus shape the three dimensional resolution element in all three reciprocal dimensions while preserving a maximum of intensity.