화상 증분 축적법을 이용한 등고선 간섭무늬의 개선

Improvement of Contour Fringes by using Addition of Incremental Images

  • 강영준 (전북대학교 기계공학부, 메카트로닉스 연구센터) ;
  • 김계성 (전북대학교 대학원) ;
  • 유원재 (전북대학교 대학원) ;
  • 권용기 (전주공업대학 기계과)
  • 발행 : 1999.12.01

초록

Electronic speckle contouring(ESC) is the optical method for measuring shape by using fringe-projection techniques in electronic speckle pattern interferometry. It has the advantage of being non-contacting and can also give a field view of the surface under investigation. Fringes in ESC represent the difference in depth along the view direction between the master wavefront and the test component. The contour maps of three-dimensional diffuse objects are obtained by small shifts of optical fiber carrying the dual-object-beams and 4-frame phase shift. We proposed the contouring method by shifting the collimated illumination beams through optical fiber in order to obtain the contour fringe patterns. And also, we performed addition of incremental addition of images and experiments based on it. we obtained both quantitative increment without decorrelation effect and qualitative improvement by reducing the noise of contour fringes.

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