Optical window design for MWIR camera

Tahir, Andi Mukhtar; Priyanto, Irwan; Arifin, Bustanul; Soedjarwo, Moedji

doi:10.1088/1742-6596/1130/1/012021

Cited by 2 publications

(2 citation statements)

References 2 publications

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“…The Finite Element Method (FEM) is a numerical technique employed to solve problems related to boundary value potentials. It was introduced by Munro in 1971 to find solutions to magnetic field problems in electron lenses in electron optics [32]. In this method, the lens is divided into a mesh consisting of numerous small quadrilaterals known as finite elements, facilitating analysis.…”

Section: The Finite Element Methods (Fem)mentioning

confidence: 99%

Program for Calculating the Axial Magnetic Field Distribution of Magnetic Lenses Using Finite Element Method

2023

JJP

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Introducing FEM-CMFD (Finite Element Method for Calculating Magnetic Field Distribution), a new program designed for calculating the magnetic field distribution for axially symmetric complex magnetic systems, such as magnetic lenses. The program operates by reading user-inputted magnetic system data presented in a two-dimensional graph. Utilizing the finite element method, it calculates the axial magnetic field distribution for various coil excitations accommodating up to approximately 10 000 intersection nodes. Keywords: Electron magnetic lens, Finite element method, Magnetic field distribution.

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Section: The Finite Element Methods (Fem)mentioning

confidence: 99%

Program for Calculating the Axial Magnetic Field Distribution of Magnetic Lenses Using Finite Element Method

2023

JJP

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“…The results showed that borosilicate crown glass (BK7) is one of the best optical windows [16]. Tahir et al discussed some important considerations for the design of special specification optical windows for mid-wave infrared (MWIR) optical systems, such as the material used and the minimum thickness associated with the rated pressure to optimize the design of this optical window [17]. Liu et al designed a large-aperture spliced optical window based on the principle of optical-mechanical-thermal integration and analyzed its optical properties in a force-thermal dynamic environment [18].…”

Section: Introductionmentioning

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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Optical window design for MWIR camera

Cited by 2 publications

References 2 publications

Program for Calculating the Axial Magnetic Field Distribution of Magnetic Lenses Using Finite Element Method

Program for Calculating the Axial Magnetic Field Distribution of Magnetic Lenses Using Finite Element Method

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

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