Journal of the Korean Society for Precision Engineering (한국정밀공학회지)
- Volume 16 Issue 12
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- Pages.190-197
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- 1999
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- 1225-9071(pISSN)
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- 2287-8769(eISSN)
Improvement of Contour Fringes by using Addition of Incremental Images
화상 증분 축적법을 이용한 등고선 간섭무늬의 개선
- Published : 1999.12.01
Abstract
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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