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首页> 外文期刊>Optics and Lasers in Engineering >Performance And Testing Of A Four Channel High-resolution Heterodyne Interferometer
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Performance And Testing Of A Four Channel High-resolution Heterodyne Interferometer

机译：四通道高分辨率外差式干涉仪的性能和测试

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When studying complex vibrations, simultaneous measurements at several points are indispensable if one is dealing with objects whose vibrational behavior is not guaranteed to be stable over longer periods of time, such as biological specimens, micro-mechanical elements or objects characterized by nearly resonant normal modes with different vibrational patterns. Obviously, both amplitude and phase need to be measured at each point to obtain a full characterization of the vibration. We introduce birefringent beam displacers as a highly efficient beam multiplying method to create a system of four heterodyne interferometers operating in parallel from a single laser source. The design and the performance characteristics (resolution, cross-talk) of the instrument will be discussed. The system revealed the existence of running vibrational modes on an electrically driven plate clamped along its outer edge.
机译：在研究复杂的振动时，如果要处理的振动对象不能保证长时间稳定，例如生物样本，微机械元件或特征接近共振的正常模式的对象，则必须在多个点同时进行测量。具有不同的振动模式。显然，振幅和相位都需要在每个点上进行测量，以获得振动的完整特征。我们引入双折射光束移位器作为一种高效的光束倍增方法，以创建一个由单个激光源并行运行的四个外差干涉仪系统。将讨论仪器的设计和性能特征（分辨率，串扰）。该系统揭示了在沿其外缘夹紧的电动板上存在运行的振动模式。

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