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Fish swim water bulk displacement visualization with digital holographic interferometry

机译：鱼游泳水散装位移可视化与数字全息干涉测量

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A collimated transmission beam interferometer is used to measure the water motion provoked by the fish swimming through it. An indirect measurement of the fish motion impact in the water contained in a home-type aquarium is detected. Measurements of the whole aquarium are possible due to a large diameter collimated laser beam in the interferometer's object arm. This beam goes through the aquarium, and any perturbation inside it deflects the collimated beam. The interferometer detects a phase difference, i.e., the beam through the disturbed water undergoes different optical paths. This optical phase change was first demonstrated by means of a simple test using spherical steel marbles placed in a cuvette. For this, the small water movements for a single steel marble are detected with the acquired optical phase. Next, the aquarium optical phase results show water movements according to the fishes' size and swimming speed. It is worth mentioning that no additives were added to the aquarium's fresh water during the tests, so the water was crystal clear. (C) 2021 Optical Society of America
机译：用准直透射光束干涉仪测量鱼在水中游动引起的水运动。对家用水族馆中的鱼类运动影响进行了间接测量。由于干涉仪的物臂中有大直径的准直激光束，所以可以对整个水族箱进行测量。光束穿过水族馆，水族馆内的任何扰动都会使准直光束偏转。干涉仪检测相位差，即通过受扰水体的光束经过不同的光路。这种光学相变首先通过一个简单的测试来证明，该测试使用了放置在反应杯中的球形钢弹珠。为此，利用获取的光学相位检测单个钢大理石的微小水运动。接下来，水族馆的光学相位结果显示，根据鱼的大小和游泳速度，水的运动。值得一提的是，在测试期间，水族馆的淡水中没有添加任何添加剂，因此水是清澈的。（2021）美国光学学会

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