Journal of the Optical Society of Korea

  • 제4권1호
  • /
  • Pages.7-10
  • /
  • 2000
  • /
  • 1226-4776(pISSN)
  • /
  • 2093-6885(eISSN)
한국광학회 (Optical Society of Korea)
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Final Diffraction Patterns of the Beam Splitters used in the Soft XRay Interferometer by a He-Ne Laser

  • Oh, Chul-Han (Kyungpook National University) ;
  • Choi, Dae-Uk (Kyungpook National University) ;
  • Park, Sung-Jin (Kyungpook National University) ;
  • Howells, M.R. (Lawrence Berkeley National Laboratory) ;
  • Moller, E.J. (Lawrence Berkeley National Laboratory)
  • 투고 : 2000.01.14
  • 발행 : 2000.03.01
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초록

The soft x-ray(10nm-100nm) interferometer is a modified Mach-Zehnder type interferometer and it consists of two beam-splitters and four totally reflecting mirrors. The beam-splitters used here are 50% transmission and 50% reflection grating type. The diffraction patterns of beam splitters(1st B.S.) were investigated with a He-Ne laser. The diffraction patterns produced by the soft x-ray interferometer (2nd B.S.) were also investigated in intensities positions. The diffraction patterns of 20 degree grazing incidence on the beam splitters(1st B.S.) show a circular array of spots. Both the reflected and the transmitted beams show the same patterns but symmetric circles on the screen. The maximum intensity appears roughly when n is in the zeroth and odd orders and the suppressed peak(missing order) appears when n is in even orders. Intensities of 3 center fringes(n = 0, $\pm$1) are stronger than others. These results confirm the reduced grating equation and make agree with the intensity distribution function. It was found that the final patterns produced by the soft x-ray interferometer (2nd B.S.) consisted of fine fringes which were caused by two of three diffraction beams that were arrived at the second beam-splitter.

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참고문헌

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