Optics for very hard X-Ray and Gamma rays.
In the very high energy range, the solution of mirroring is not possible, as the maximum reflective angle becomes too small. In this case using a Laue lens is the preferred solution.
Using the interference between the different angles through a bend or mosaic crystal, imaging can be achieved where it is not otherwise possible. Using an SPO based techniques, where bend and wedged single chrystal Silicon plates are stacked without pores, allows for superior Silicon Laue lensing.