Patent Number: 
Section: claims

1. An X-ray optical apparatus, comprising:an X-ray reflective structure in which at least three reflective substrates are laminated so as to match both edges with an interval and an X-ray which is incident into an X-ray passage formed by a space, both sides of the passage being put between the reflective substrates, is reflected from the reflective substrate at both sides of the X-ray passage and emitted from the X-ray passage,wherein the at least three reflective substrates are arranged to have a constant and equal thickness, andwherein when an edge of the X-ray reflective structure is an inlet of the X-ray and the other edge is an outlet of the X-ray, a pitch of the reflective substrates at the outlet is larger than a pitch at the inlet, andwherein spacers arranged to have different heights are disposed between the reflective substrates, so that the pitch of the reflective substrates at the outlet side is larger than the pitch at the inlet side. 2. The X-ray optical apparatus according to claim 1, wherein the spacers are arranged to have a pillar shape and are disposed between the reflective substrates with a predetermined interval. 3. The X-ray optical apparatus according to claim 2, wherein the spacers are disposed at the same position on different layers. 4. The X-ray optical apparatus according to claim 1, wherein the reflective substrates and the spacers are integrally formed by etching a glass substrate. 5. The X-ray optical apparatus according to claim 1, further comprising:an X-ray source,wherein if a virtual plane is set in a position which is separated from the reflective substrates at both sides of the X-ray passage with the same distance, the X-ray source is disposed on tangential planes of a plurality of virtual planes at the inlet and tangential planes of the plurality of virtual planes at the outlet are approximately parallel. 6. The X-ray optical apparatus according to claim 1, further comprising:an X-ray source,wherein if a virtual plane is set in a position which is separated from the reflective substrates at both sides of the X-ray passage with the same distance, the X-ray source is disposed on tangential planes of a plurality of virtual planes at the inlet and tangential planes of the plurality of virtual planes at the outlet intersect on a common straight line.