The birth of the X-ray refractive lens |
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Authors: | Toshihisa Tomie |
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Institution: | National Institute of Advanced Industrial Science and Technology (AIST), Nanodevice Innovation Research Center (NIRC), 1-1-1, Umezono, Tsukuba, Ibaraki, Japan |
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Abstract: | In the X-ray region, no optics based on the principle of refraction existed since the discovery of the X-rays by Röentgen in November 1985, although mirrors and zone-plates that use the principle of reflection and diffraction have been employed. The idea of a practical X-ray refractive lens was first disclosed in February 1994, i.e., just one year before the centenary of the discovery of X-rays. The present paper reviews why the X-ray lens did not appear for so many years, and how the design was born. The paper also discusses technologies to be developed for high performance X-ray lenses, and advantages of refractive X-ray lenses over other X-ray optics. |
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Keywords: | Three principles in optics Long focal length Large absorption Changing the direction of optical axis Unit lenses on a robust substrate |
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