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Measurement of parameters of simple lenses using digital holographic interferometry and a synthetic reference wave

机译:使用数字全息干涉仪和合成参考波测量简单镜片的参数

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The use of digital holographic intrerferometry in the testing of simple thin lenses is explored. Focal length, radius of curvature, and refractive index are the lens parameters that can be determined using this method. The digital holograms using the lens under test are recorded at various positions of the test lens using off-axis geometry. This is combined with a digitally computed plane wavefront to determine the curvature of the light beam emerging from the test lens. Focal length is the position of the test lens where a single fringe results. The radius of curvature of the test lens is also determined similarly using a long focal length lens to concentrate a collimated beam onto the test lens. The nonuniformities on the lens surface could also be found by using this method. The implementation of the method is shown by using computer simulations in the case of biconvex lenses. The method can be utilized to measure the parameters of plano-convex and concave lenses also.
机译:探索了在简单的薄镜片测试中使用数字全息干涉术的方法。焦距,曲率半径和折射率是可以使用此方法确定的镜片参数。使用被测透镜的数字全息图使用离轴几何形状记录在测试透镜的各个位置。这与数字计算的平面波前相结合,以确定从测试透镜射出的光束的曲率。焦距是测试透镜产生单个条纹的位置。还使用长焦距透镜类似地确定测试透镜的曲率半径,以将准直光束聚焦到测试透镜上。使用此方法也可以发现镜片表面的不均匀性。在双凸透镜的情况下,通过计算机模拟显示了该方法的实现。该方法还可用于测量平凸和凹透镜的参数。

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