Optimization-based open-loop control of phase modulators for adaptive optics

Optimization-based open-loop control of phase modulators for adaptive optics
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自适应光学相位调制器的基于优化的开环控制

DOI:
10.1117/12.2509633
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
Ç. Ataman
Ç. Ataman
中科院分区:
--
文献类型:
--
作者:
P. Rajaeipour;K. Banerjee;H. Zappe;Ç. Ataman

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介绍了一种基于优化的二维波前调制器开环控制方法。优化问题是凸的,具有不等式约束,可以使用邻域点法实时求解。与传统的影响矩阵求逆方法相比,该方法考虑了系统的限制,如驱动器的驱动极性和电压限制。该算法在系统边界约束条件下搜索驱动信号的全局最优解。因此,在降低硬件复杂性的同时,它更不受系统误差的影响,并保证致动信号的最优性。该控制系统是在两种不同的静电驱动相位调制器上实现的:一种传统的可变形反射镜和一种新型的折射式光流相位调制器。我们实验比较的性能optimizationbased控制器与传统的方法高阶Zernike模式复制。它表明,引入的技术,使更准确的控制调制器,特别是在大的校正幅度和/或高阶校正。
We introduce an optimization-based open-loop control method for 2D wavefront modulators. The optimization problem is convex with inequality constraints and can be solved using an interior-point method in real-time. Compared to conventional influence matrix inversion, this new method takes into account the system limitations, such as the actuation polarity and voltage limits of the drivers. It searches for the global optimum of actuation signals within system boundary constraints. Consequently, while reducing the complexity of the hardware, it is more immune to systematic errors and guarantees optimality of the actuation signals. The control system is implemented on two different electrostatically-actuated phase modulators; a conventional deformable mirror and a novel refractive optofluidic phase modulator. We experimentally compare the performance of the optimizationbased controller with conventional methods for high order Zernike mode replication. It is demonstrated that the introduced technique enables more accurate control for both modulators, particularly at large correction amplitude and/or higher order corrections.
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