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Digital speckle techniques for measuring light deflection profiles of inhomogeneous phase objects

机译：数字散斑技术，用于测量不均匀相位对象的光偏转曲线

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Digital speckle pattern photography is applied to the measurement of light deflection profiles of mogeneous transparent objects by transmission of a He-Ne laser specie field through the object. The speckles are recorded with a CCD camera, and the local displacements are evaluated by comparison d the deflected speckle field with the undeflected field by a digital cross-correlation technique. In this way a complete two-dimensional deflection field can be obtained from a single pair of CCD records. The bask technique and two experimental setups suitable for objects with a size larger than that of the CCD chip are described. These novel techniques are applied to determine profiles of the refractive index of a free-burning arc in air. In addition, a cinematographic setup is described, which allows the investigation of transient objects by means of a video tape recorder. # 1997,Optical Society of America
机译：通过将He-Ne激光物种场透射通过数字散斑图案摄影，将其用于测量透明物体的光偏转曲线。用CCD相机记录斑点，并通过数字互相关技术将偏转的斑点场与未偏转的场进行比较来评估局部位移。这样，可以从一对CCD记录中获得完整的二维偏转场。描述了适合于尺寸大于CCD芯片的物体的晒晒技术和两个实验装置。这些新颖的技术可用于确定空气中自由燃烧电弧的折射率分布。此外，还描述了一种电影摄影装置，其允许通过录像机来研究瞬态物体。 ＃1997，美国光学学会

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