Patent Number: 
Section: claims

1. An X-ray condenser for condensing X-rays radiated from an X-ray source, comprising: parallel beam forming means for forming X-rays radiated from said X-ray source to parallel X-ray beams;  a zone plate provided on a downstream side of said parallel beam forming means in a propagating direction of the X-rays and constructed by alternately arranging a plurality of X-ray transmitting bands and X-ray shielding bands; and  an analyzing crystal provided between said parallel beam forming means and said zone plate, for selecting X-rays having a specific wavelength from X-rays containing a plurality of X-ray components having different wavelengths. 2. An X-ray condenser as claimed in  claim 1 , further comprising a casing for air-tighly enclosing said parallel beam forming means and said zone plate and evacuation means for discharging air in said casing. claim 1 3. An X-ray condenser as claimed in  claim 1 , wherein said parallel beam forming means is parabolic parallel beam forming means having parabolic surfaces, for forming diverging X-ray beams to parallel X-ray beams either horizontally or vertically by utilizing said parabolic surfaces. claim 1 4. An X-ray condenser as claimed in  claim 1 , wherein said parallel beam forming means is parabolic parallel beam forming means having a pair of parabolic surfaces juxtaposed with each other, for forming diverging X-ray beams to parallel X-ray beams both horizontally and vertically by utilizing said parabolic surfaces. claim 1 5. An X-ray condenser as claimed in  claim 3 , wherein said parallel beams forming means is a parabolic reflection mirror capable of reflecting X-ray by a parabolic surface or a parallel multi-layered film mirror capable of diffracting X-ray by a multi-layered film formed on a parabolic surface thereof. claim 3 6. An X-ray condenser as claimed in  claim 4 , wherein said parallel beam forming means is a parabolic reflection mirror capable of reflecting X-ray by a parabolic surface or a parallel multi-layered film mirror capable of diffracting X-ray by a multi-layered film formed on a parabolic surface thereof. claim 4 7. An X-ray condenser as claimed in  claim 4 , wherein said X-ray source is a point focus X-ray source having an X-ray focus point having an area defined by a horizontal side length substantially the same as a vertical side length. claim 4 8. An X-ray diffraction apparatus including an X-ray source, an X-ray condenser for condensing X-rays radiated from said X-ray source to a micro-point of a specimen or a micro-specimen and X-ray detection means for detecting X-rays from said specimen, wherein said X-ray condenser comprises: parallel beam forming means for forming X-rays radiated from said X-ray source to parallel X-ray beams;  a zone plate provided on a downstream side of said parallel beam forming means in a propagating direction of the X-rays and constructed by alternately arranging a plurality of X-ray transmitting bands and X-ray shielding bands; and  an analyzing crystal provided between said parallel beam forming means and said zone plate, for selecting X-rays having a specific wavelength from X-rays containing a plurality of X-ray components having different wavelengths. 9. An X-ray diffraction apparatus as claimed in  claim 8 , further comprising a casing for air-tightly enclosing said parallel beam forming means and said zone plate and evacuation means for discharging air in said casing. claim 8 10. An X-ray diffraction apparatus as claimed in  claim 8 , wherein said parallel beam forming means is parabolic parallel beam forming means having parabolic surfaces, for forming diverging X-ray beams to parallel X-ray beams either horizontally or vertically by utilizing said parabolic surfaces. claim 8 11. An X-ray diffraction apparatus as claimed in  claim 8 , wherein said parallel beam forming means is parabolic parallel beam forming means having a pair of parabolic surfaces juxtaposed with each other, for forming diverging X-ray beams to parallel X-ray beams both horizontally and vertically by utilizing said parabolic surfaces. claim 8 12. An X-ray diffraction apparatus as claimed in  claim 10 , wherein said parallel beam forming means is a parabolic reflection mirror capable of reflecting X-rays by a parabolic surface or a parallel multi-layered film mirror capable of diffracting X-rays by a multi-layered film formed on a parabolic surface thereof. claim 10 13. An X-ray diffraction apparatus as claimed in  claim 11 , wherein said parallel beam forming means is a parabolic reflection mirror capable of reflecting X-rays by a parabolic surface or a parallel multi-layered film mirror capable of diffracting X-rays by a multi-layered film formed on a parabolic surface thereof. claim 11 14. An X-ray diffraction apparatus as claimed in  claim 11 , wherein said X-ray source is a point focus X-ray source having an X-ray focus point having an area defined by a horizontal side length substantially the same as a vertical side length. claim 11