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首页> 外文会议>Conference on Optical Design and Testing; 20071112-15; Beijing(CN) >Simulation of the Phase-shift and Anti-vibration in Wavefront Time-domain Algorithm
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Simulation of the Phase-shift and Anti-vibration in Wavefront Time-domain Algorithm

机译：波前时域算法中相移和抗振的仿真

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摘要

The wavefront time-domain detection algorithm is a simple, practical and low-cost interferometry method, which can be adapted to all kinds of outside noise and achieve high accuracy in interferometric measurement on optical components and systems. For further understanding the wavefront time-domain measurement of anti-jamming capability and accuracy of interferometry, the simulation is presented of time-domain sampling frequency of interferograms, external vibration frequency and amplitude, and harmonic effect, etc. in this paper. This algorithm makes the measurement controlled by means of using the environment vibration and air turbulence as phase shifters, simply with assistance of active phase shifting. Acquiring adequate interferograms to calculate the phase value of each point, we can obtain the stable wave surface wiping off random vibration and air turbulence by the unwrapping and average calculation. In this process, by changing the time-domain sampling frequency, external vibration frequency and amplitude in the simulation, the relationships among them can be obtained. The appropriate sampling frequency could be chosen according to the conditions of actual measurement to ensure the accuracy and stability of measurement. According to statistical analysis, this algorithm enhance its ability of anti-jamming, and improve the adaptability and especially for the real-time detection of large aperture mirror.
机译：波前时域检测算法是一种简单，实用，低成本的干涉测量方法，可以适应各种外界噪声，并在光学组件和系统的干涉测量中实现高精度。为了进一步了解波前时域测量的抗干扰能力和干涉测量的准确性，本文对干涉图的时域采样频率，外部振动频率和振幅以及谐波效应等进行了仿真。该算法通过使用环境振动和空气湍流作为移相器来控制测量，而仅借助于主动相移。获得足够的干涉图以计算每个点的相位值，我们可以通过展开和平均计算获得稳定的波面，以消除随机振动和空气湍流。在此过程中，通过在仿真中更改时域采样频率，外部振动频率和幅度，可以获得它们之间的关系。可以根据实际测量的条件选择合适的采样频率，以确保测量的准确性和稳定性。根据统计分析，该算法增强了抗干扰能力，提高了适应性，尤其适用于大口径镜的实时检测。

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