a method and apparatus for fabricating x - ray optics of the type having a doubly curved crystal lamella attached to a backing plate that is positioned and aligned for use in a spectrometer , monochromator or point - focusing instrument . the fabrication method is an improvement over the one described in u . s . pat . no . 6 , 236 , 710 and provides for simpler and more accurate prepositioning the crystal lamella relative to the backing plate . this method utilizes an apparatus with a removable top and a removable liner ; said top containing one or more micrometer screws , and said liner being made of a material to which the bonding agent does not adhere . during fabrication of the optic by pressing the crystal against a doubly curved mold via the viscous bonding agent , excess bonding agent escapes through channels in the liner . the liner is suitably configured so that the completed optic can be easily removed and the mold and fabrication apparatus can be reused many times .