Thermal-Optical Analysis for Optical Window of High-Altitude and High-Speed Aerial Camera

Jinfeng, 石进峰 Shi; Qing-wen, 吴清文 Wu; Jianping, 张建萍 Zhang; Yong, 黄勇 Huang; Xian-wei, 杨献伟 Yang; Ya-lin, 丁亚林 Ding

doi:10.3788/aos201232.0422004

Cited by 4 publications

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“…Environmental changes are one of the most important factors affecting the optical performance of the optical window. Such changes can cause distortion of the window surface, which must be fitted using Zernike polynomials to transfer the optical glass deformation data to the optical analysis software Zemax [35,36]. The specific analysis process is shown in Figure 9.…”

Section: Optical Performance Analysis Of Optical Windowsmentioning

confidence: 99%

Design and Optical Performance Analysis of Large-Aperture Optical Windows for Structural Vibration Reduction

Liu,

Zhang,

Han

et al. 2024

Photonics

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In order to address the issue of large-aperture optical windows operating in wind tunnel environments with dynamic responses, the damping ratio between the vibration isolation device and the mass of the system was calculated by the passive vibration isolation principle. Two isolation models using circular rubber pads and rectangular rubber pads were proposed, and it was proven that the stiffness value of the circular rubber pad is superior to that of the rectangular rubber pad. A three-dimensional model of the optical window was established using finite element analysis software to simulate the working vibration environment of the optical window. Modal analysis and harmonic response analysis were carried out on the optical system with the isolation device installed, and the nodal data of the optical glass surface changes in the optical window were input into the Zemax 19.4 optical design software in the form of Zernike coefficients to calculate imaging quality evaluation indicators. Through finite element structural analysis of the optical window and evaluation of optical performance indicators, it was demonstrated that under the background of the wind tunnel working environment, the isolation performance of the circular rubber pad in the isolation device of the optical window is superior to that of the rectangular rubber pad. This study can provide a design basis for the isolation analysis methods and isolation measures of optical windows in wind tunnel working environments. These research results have implications for the development of large-aperture optical windows in high-speed wind tunnel applications.

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Section: Optical Performance Analysis Of Optical Windowsmentioning

confidence: 99%

Design and Optical Performance Analysis of Large-Aperture Optical Windows for Structural Vibration Reduction

Liu,

Zhang,

Han

et al. 2024

Photonics

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show abstract

“…激光与光电子学进展 www.opticsjournal.net 092204-会导致光学设计系统产生一定的热光学误差，表现为波像差，畸变劣化，进而降低成像质量，影响系统分辨率。合理的光机热集成分析能够综合评估光学系统，改进系统设计，提高系统的光学性能，避免单一分析造成的设计缺陷。设计阶段充分考虑温度变化导致的像质劣化，并采用相应的补偿措施，在光机热集成设计中得到了广泛的应用 [4][5][6][7][8][9][10] 。陈华等 [11] 分析了物镜系统的热变形、温度致折射率变化、应力双折射等几种因素对光学系统像质的贡献； Nakashima 等 [2] 则针对投影物镜的热像差问题，采用可动镜片结合红外热补偿技术(IAC)，实现了不同照明模式及掩模下的热像差补偿； Scott Halle 等 [3] 则在光刻机上采用一种新的热像差补偿元件，使得 Zernike 像差的补偿能够延伸至 64 项。但是上述分析都是从整体上考虑系统的热光学性能，并没有从具体的结构细节与环境扰动等因素思考，对实际的结构设计及环境约束并不能起到较为明确的指导意义。本文从光刻投影物镜工程实用角度出发，以小物镜系统为例，对光机结构的激光热源的强度、支撑结构 [12][13] 。极坐标下，其表达式为 [14] z…”

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