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A digital holographic method that can be used for the simultaneous measurement of slopes of a deformed object in different directions is described in this paper. In this method, two holograms are recorded numerically under the normal and deformed states of the specimen, and two object waves are numerically calculated from these two holograms. The slopes corresponding to different directions are measured by superposing the two object waves with appropriate shifts. It is a superior method in regard to the simple experiment setup, the flexibility in handing the data, and the high quality phase maps. 相似文献
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1 Introduction Stressanalystsareofteninterestedinthederivativesofthedisplacementratherthanthedisplacementitself ,becausestrainsandhencestressesarefirst orderderivativesofdisplacement.Thederivativescanbeobtainednumericallyfromthedisplacementdatabutthep… 相似文献
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结合理论分析和神光装置照明系统的设计,由于光的衍射作用,使通过照明系统的激光束入射到特定靶面成一光斑,为了缩减中央光斑大小,提出了一种新的系统孔径分割法,从光的衍射理论证明这种方法是有效的,使中央光斑缩小,缩减了中央光斑缓慢变化部分. 相似文献
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