Experimental validation of opto-thermo-elastic modeling in OOFELIE multiphysics
Experimental validation of opto-thermo-elastic modeling in OOFELIE multiphysics
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OOFELIE 多物理场中光热弹性建模的实验验证
DOI：
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发表时间：
2011
期刊：
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通讯作者：
P. De Vincenzo
中科院分区：
文献类型：
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作者：
A. Mazzoli;P. Saint;A. Orban;Jean;J. Loicq;C. Barbier;Y. Stockman;M. Georges;P. Nachtergaele;S. Paquay;P. De Vincenzo
这项工作的目的是证明一个简单的实验室试验台案例与OOFELIE多物理软件的预测之间的相关性，以便推导出建模指南和改进。为此，对两种光学系统进行了分析。第一个是固定在铝桶中的球面透镜，这是光学机械系统中最简单的结构。在这项研究中，材料的特性是众所周知的：BK7和铝被保留。样品的温度变化范围为0到+60°C。第二个系统是通过专用烤箱加热的YAG激光棒。对于两个试验台，用菲佐干涉仪测量了热弹性变形。该传感器在20 nm到1μm的范围内测量波前误差，而不与光机械系统进行物理接触。对于YAG棒，还使用偏振台进行了双折射和偏振测量。测试结果与OOFELIE多物理的预测结果进行了比较，OOFELIE多物理是一种专门研究涉及光学、力学、热物理、电学、电磁学、声学和流体动力学的多物理耦合问题的模拟软件。为了提高计算热弹性变形的精度及其对光学性能的影响，已经发布了建模指南。
The objective of this work is to demonstrate the correlation between a simple laboratory test bench case and the predictions of the OOFELIE Multiphysics software in order to deduce modeling guidelines and improvements. For that purpose two optical systems have been analyzed. The first one is a spherical lens fixed in an aluminium barrel, which is the simplest structure found in an opto-mechanical system. In this study, material characteristics are assumed to be well known: BK7 and aluminium have been retained. Temperature variations between 0 and +60°C from ambient have been applied to the samples. The second system is a YAG laser bar heated by means of a dedicated oven. For the two test benches thermo-elastic distortions have been measured using a Fizeau interferometer. This sensor measures wavefront error in the range of 20 nm to 1 μm without physical contact with the opto-mechanical system. For the YAG bar, birefringence and polarization measurements have also been performed using a polarimetric bench. The tests results have been compared to the predictions obtained by OOFELIE Multiphysics which is a simulation software dedicated to multiphysics coupled problems involving optics, mechanics, thermal physics, electricity, electromagnetism, acoustics and hydrodynamics. From this comparison modeling guidelines have been issued with the aim of improving the accuracy of computed thermo-elastic distortions and their impact on the optical performances.