Micro Pore Optic(MPO) is a kind of grazing incidence optical element, which can focus X-ray and ultraviolet light. MPO is a type of thin slice glass with porous structure and made up of millions of square
shaped pores. The micro pore size is in micron scale and the surface of inner wall has very low roughness. The shape of MPO can be divided into two classes: plane and sphere. The planar MPO can focus the divergent light, while the spherical MPO can focus the parallel light. In all known X-ray optics, MPO not only guarantee the large field of view and high resolution, but also have the smallest volume and lightest weight. In order to obtain the best focusing performance, the inner wall could be coated with increasing reflective film with different film materials for different application bands.