초록 ▼

A crystal diffraction instrument or diffraction grating instrument with an improved crystalline structure or grating spacing structure having a face for receiving a beam of photons or neutrons and diffraction planar spacing or grating spacing along that face with the spacing increasing progressively

A crystal diffraction instrument or diffraction grating instrument with an improved crystalline structure or grating spacing structure having a face for receiving a beam of photons or neutrons and diffraction planar spacing or grating spacing along that face with the spacing increasing progressively along the face to provide a decreasing Bragg diffraction angle for a monochromatic radiation and thereby increasing the usable area and acceptance angle. The increased planar spacing for the diffraction crystal is provided by the use of a temperature differential across the crystalline structure, by assembling a plurality of crystalline structures with different compositions, by an individual crystalline structure with a varying composition and thereby a changing planar spacing along its face, and by combinations of these techniques. The increased diffraction grating element spacing is generated during the fabrication of the diffraction grating by controlling the cutting tool that is cutting the grooves or controlling the laser beam, electron beam or ion beam that is exposing the resist layer, etc. It is also possible to vary this variation in grating spacing by applying a thermal gradient to the diffraction grating in much the same manner as is done in the crystal diffraction case.

대표청구항 ▼

A crystal diffraction instrument comprising means for diffracting a beam having an energy of above about 5 KeV, including a crystalline structure with a surface having a face for receiving the beam and atomic planar spacing along the face for diffracting the beam, the spacing changing progressively

A crystal diffraction instrument comprising means for diffracting a beam having an energy of above about 5 KeV, including a crystalline structure with a surface having a face for receiving the beam and atomic planar spacing along the face for diffracting the beam, the spacing changing progressively along a direction parallel to said face to provide Bragg angles of progressively changing values to increase the usable area of said face for diffraction and to provide a focusing of said beam.