Abstract
Based on geometric moire method, moire interferometry and microscopic moire interferometry, a high spatial resolution and high sensitivity geometric microscopic moire method is presented. Geometric micron-moire patterns are produced by the superposition of two high frequency gratings through a microscope system. Compared with other grating-based photo-mechanics methods, microscopic moire method could provide whole-field moire patterns of both high spatial resolution and high sensitivity. The frequency of specimen and reference gratings used in this method can be from 1 line/mm to 10000 lines/mm. Additionally, a 4F optical filter system is used to enhance the contrast of microscopic moire patterns effectively.
Key Words
high spatial resolution high sensitivity geometric moire microscopePreview
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References
- 1.Dai FL. Modern Photo-Mechanics. Beijing: Science Press, 1990 (in Chinese)Google Scholar
- 2.Chona R, Khanna SK, Kmiec KJ. Application of high resolution geometric moire method to fracture problems.Exp Tech, 1995, Nov/Dec: 10–13Google Scholar
- 3.Zhao KH. Optics. Beijing: Peking University Press, 1983 (in Chinese)Google Scholar
- 4.David WR, Graeme TR. Interferogram Analysis. London: IOP Publishing, 1993Google Scholar
- 5.Post D, Han B, Ifju P. High Sensitivity Moire. New York: Springer-Verlag, 1994Google Scholar