3D simulation for scatter light distribution of optical surface defects

Chai, Huiting; Zhang, Pengfei; Yang, Yongrong; Bai, Jian; Zhang, Yihui

doi:10.1117/12.2320439

Cited by 2 publications

(2 citation statements)

References 3 publications

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“…With further research on scientific and high-tech equipment in the field of space optics, aerospace, inertial confinement fusion (ICF), defence weaponry, etc., advanced optical manufacturing puts more stringent requirements on the surface quality of optical components [1] . The surface quality of optical components has a direct impact on the application of optical systems, and the scattered light generated by scratches, digs and other defects on their surfaces will increase system noise, reduce contrast, etc., affecting the performance and normal operation of the entire optical system [2] .…”

Section: Introductionmentioning

confidence: 99%

Depth detection of optical surface defects based on transport of intensity equation

Gao,

Wang,

Tian

et al. 2024

Speckle 2023: VIII International Conference on Speckle Metrology

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For the three-dimensional detection of surface defects on optical components, the article proposes to apply the Transport of Intensity Equation (TIE) algorithm to the scattering method in detecting the depth of defects on the surface of optical element. Firstly, a simulation model is established to simulate the scattering light distribution caused by the surface defects, and then use the TIE algorithm to obtain the phase of the surface scratch, finally the depth of the scratch is calculated by the modulation characteristics of the surface scratch on the phase. The correlation coefficient and the relative root-meansquare error are used to evaluate the effectiveness of the algorithm, and compared with the Angular Spectrum iterative algorithm. Numerical simulation results show that the TIE algorithm can realize the reconstruction of the depth of defects on the surface of optical elements, and the reconstructed scratch depth has a small relative error and high reconstruction accuracy. The proposed method is flexible and fast, thus suitable for practical industrial applications.

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Section: Introductionmentioning

confidence: 99%

Depth detection of optical surface defects based on transport of intensity equation

Gao,

Wang,

Tian

et al. 2024

Speckle 2023: VIII International Conference on Speckle Metrology

View full text Add to dashboard Cite

show abstract

“…In the visible band, the imaging system collects light from different reflection areas, causing the detected characteristics of the measured object to change, which is the same as the imaging results in the THz band [14] . The visible light scattering field from surface defects of optical components has been simulated by using an electromagnetic model [15][16][17] . The scattering field is then converted into a far-field distribution known as a visible image by using the angular spectrum theory.…”

Section: Introductionmentioning

confidence: 99%

Simulation for embedded-defects foam terahertz images of active bifocal terahertz imaging system at 0.22 THz based on geometric optics

et al. 2023

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We simulate the measurements of an active bifocal terahertz imaging system to reproduce the ability of the system to detect the internal structure of foams having embedded defects. Angular spectrum theory and geometric optics tracing are used to calculate the incident and received electric fields of the system and the scattered light distribution of the measured object. The finite-element method is also used to calculate the scattering light distribution of the measured object for comparison with the geometric optics model. The simulations are consistent with the measurements at the central axis of the horizontal stripe defects.

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3D simulation for scatter light distribution of optical surface defects

Cited by 2 publications

References 3 publications

Depth detection of optical surface defects based on transport of intensity equation

Depth detection of optical surface defects based on transport of intensity equation

Simulation for embedded-defects foam terahertz images of active bifocal terahertz imaging system at 0.22 THz based on geometric optics

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