Absolute position measurement by lateral shearing interferometry of point-diffracted spherical waves

점회절 구면파의 전단 간섭계를 이용한 절대위치 측정

  • 주지영 (한국과학기술원 기계공학과) ;
  • 김승우 (한국과학기술원 기계공학과)
  • Published : 2006.05.01

Abstract

The method measuring the absolute position of a point diffraction source emitting a spherical wavefront in three-dimension is proposed. Two-dimensional interference of spherical wavefronts is used to overcome ambiguity of phase order. The spherical wavefront is explicated by Taylor series expansion, from which a radius of curvature of a spherical wavefront and its center position in three-dimension are obtainable. The spherical wavefront is reconstructed by a modified lateral shearing interferometer, which uses single-mode fiber as a point diffraction source.

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