X-Ray Holographic Microscopy

Applications of the holography to the X-ray region are described. Two types of the image-reconstructing process are attempted. In-line holograms of line-like objects of chemical fibers and point-like objects of red blood cells are made by using Al Kα radiation (8.34A) from a two-stage fine focus X-ray generator. Magnified real images are reconstructed from the negative holograms using a He-Ne laser (6328A) . A resolution of about 4 μm is obtained in this imaging process. On the other hand, a lensless Fourier-transform hologram of a model object like a row of slits is made by using an electron synchrotron radiation (60A) . A magnified real image is reconstructed by a Fourier-transform method, where a magnification factor of 158 is obtained. Several factors limiting the image resolution are discussed.