Method development for vibration characteristics registration of optically-transparent elements

IF 3.1 3区物理与天体物理 Q2 Engineering

Optik Pub Date : 2025-03-04 DOI:10.1016/j.ijleo.2025.172284

A.V. Ivchenko, A.I. Zhuzhukin, R.N. Sergeev, A.I. Safin

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Abstract

A method for investigation of natural vibration modes of the large-sized, optically-transparent products of optical systems has been developed. To measure the vibration displacements of a flat optical surface with the deposited, easily-removable, light-scattering coating, an optical scheme based on the noise-proof speckle pattern interferometer with CW-laser has been proposed. The optimal, optical transmission of the coating has been determined to provide the registration of contrast speckle-interferograms. It was shown that the maximum visibility of interference fringes in speckle interferograms was achieved with a transmission of the light-scattering layer in the range of τ_с = 43–63 % and decreased beyond the range. In addition, it was noted that use of the optically-dense, the light-scattering coatings with τ_с < 43 % affected on the number of the recorded interference fringes in speckle-interferograms, although the excitation level of object was constant. The phenomenon was simultaneously occurring with the transition from the mixed reflection to diffuse-scattering when the optically-dense light-scattering coating was deposited. At the same time, it was shown that the effect could not be caused by the detuning of the excited object from resonance due to a gain in the weight of the applied coating. For a diffusely scattering element, as optically-transparent component of the speckle-interferometer, the set of vibration modes corresponding to the calculated data of the numerical model was recorded. It was shown that the mismatch between experimental and calculation data in the magnitudes of resonant frequencies did not exceed 1 % in the range of 20–200 Hz, while for the range of 200–900 Hz it was of 5–7 %.

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光学透明元件振动特性配准方法的发展

本文提出了一种研究光学系统大尺寸、光学透明产品固有振动模态的方法。为了测量平面光学表面沉积的易拆卸光散射涂层的振动位移，提出了一种基于防噪声散斑干涉仪的cw激光光学方案。确定了该涂层的最佳光透射率，以提供对比度散斑干涉图的配准。结果表明，当光散射层透射率在τ r = 43 ~ 63 %范围内时，散斑干涉图中干涉条纹的可见度最大，超过该范围后，干涉条纹的可见度减小。此外，我们还注意到，使用光学致密的光散射涂层，τ r <； 43 %的光散射涂层对散斑干涉图中记录的干涉条纹的数量有影响，尽管物体的激发水平是恒定的。该现象与光致密光散射涂层由混合反射向扩散散射过渡同时发生。同时，结果表明，该效应不可能是由于涂层重量的增加而使被激物体从共振中失谐所引起的。对于扩散散射元件，作为散斑干涉仪的光学透明元件，记录数值模型计算数据对应的振动模态集合。结果表明，在20 ~ 200 Hz范围内，实验数据与计算数据在谐振频率幅度上的不匹配不超过1 %，而在200 ~ 900 Hz范围内，实验数据与计算数据的不匹配为5 ~ 7 %。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Optik 物理-光学

CiteScore

6.90

自引率

12.90%

发文量

1471

审稿时长

46 days

期刊介绍： Optik publishes articles on all subjects related to light and electron optics and offers a survey on the state of research and technical development within the following fields: Optics: -Optics design, geometrical and beam optics, wave optics- Optical and micro-optical components, diffractive optics, devices and systems- Photoelectric and optoelectronic devices- Optical properties of materials, nonlinear optics, wave propagation and transmission in homogeneous and inhomogeneous materials- Information optics, image formation and processing, holographic techniques, microscopes and spectrometer techniques, and image analysis- Optical testing and measuring techniques- Optical communication and computing- Physiological optics- As well as other related topics.