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Using adaptive genetic algorithm optimize to realize the extended depth-of-field wavefront coding mask for a large field-of-view microscopy system

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OPTICS AND LASERS IN ENGINEERING 2025年 185卷

作者： Zhang, Qinghan Jing, Xudong Sun, Liujie Wei, Xiaoxiao Wan, Xinjun Zheng, Jihong Univ Shanghai Sci & Technol Lab Modern Opt Syst Shanghai 200093 Peoples R China

wavefront coding technology (WFC) is a computational photography technique that significantly extends a system's depth of field (DOF) while mitigating the impact of aberrations and the environment. A freely inserted wavefront coding microscopy system that realizes high-resolution imaging with large DOF in a wide field of view (FOV) is proposed. On the basis of a designed large DOF microscopy system, an adaptive genetic algorithm is developed to interactively analyze, design, and optimize the phase mask and its effects on the system. The algorithm adaptively adjusts the parameters for selection, crossover, and mutation. Furthermore, it reconstructs the optimization function while considering processability, thereby efficiently and accurately selecting phase mask parameters. The phase mask is prepared and integrated into the system with a freely inserted fixture, which provides flexibility and ease of operation. wavefront encoding/decoding experiments demonstrate that the system can extend the DOF by approximately +/- 13 times in a large FOV, while slightly decreasing the resolution from 6.20 mu m to 7.81 mu m, and mitigating aberrations and FOV effects. The integrated phase mask does not influence the design of the optical system, is universal, and simplifies the system's structure. This provides advantages in applications such as biological microscopes, endoscopes, and drones, which have strict sample and environmental requirements.

关键词： wavefront coding Extended depth of field Adaptive genetic algorithm Large field of view Microscopy system

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Optical transfer function analysis of circular-pupil wavefront coding systems with separable phase masks

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Chinese Physics B 2012年第6期21卷 200-206页

作者：赵廷玉刘钦晓余飞鸿 Department of Physics Zhejiang Sci-Tech University Optical Engineering Department Zhejiang University

This paper proposes a simple method to achieve the optical transfer function of a circular pupil wavefront coding system with a separable phase mask in Cartesian coordinates. Based on the stationary phase method, the optical transfer function of the circular pupil system can be easily obtained from the optical transfer function of the rectangular pupil system by modifying the cut-off frequency and the on-axial modulation transfer function. Finally, a system with a cubic phase mask is used as an example to illustrate the way to achieve the optical transfer function of the circular pupil system from the rectangular pupil system.

关键词： wavefront coding circular pupil separable phase mask stationary phase method

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wavefront coding for visual optics 3

Wavefront coding for visual optics

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3rd International Conference on Applications of Optics and Photonics

作者： Acosta, E. Arines, J. Almaguer, C. Univ Santiago de Compostela Fac Opt Campus Vida Santiago 15782 Spain

ISBN: (数字)9781510613843

ISBN: (纸本)9781510613843;9781510613836

wavefront coding (WFC) enables the depth of field of incoherent optical systems to be extended. This method involves a cubic-phase plate in the system yielding a blurred image nearly invariant to defocus. In visual optics there is a big interest in improving solutions for two different problems: Presbyopia correction and high resolution retinal images with low cost devices. In this work we will show how the use of cubic phases in contact lenses can be an alternative to multifocal lenses and how WFC technique can be applied to record high resolution retinal images reducing the complexity of the actual systems.

关键词： wavefront coding cubic phase aberrations presbyopia adaptive optics retinal images

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wavefront coding Based Strong Backlight Target Detection 29

Wavefront Coding Based Strong Backlight Target Detection

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29th International Conference on Mechatronics and Machine Vision in Practice (M2VIP)

作者： Xu, Fan Bai, ChengChao Harbin Inst Technol Dept Aerosp Coll Harbin Peoples R China

ISBN: (纸本)9798350325621

Under reverse light conditions, the incident light energy from the target is substantial, leading to saturation in existing detectors. This saturation can cause damage and impair the detectors, resulting in an inability to effectively perceive the potential threat of reverse light. Currently, installing lens covers on the detectors is the primary approach, but it has limitations in terms of detection range and applicability. To address these challenges, this paper proposes an optical detection method based on wavefront coding, leveraging its directional dispersion, strong light suppression, and near-lossless restoration characteristics. This method enables the detection and verification of backlight targets. Additionally, a design optimization method for an aspherical phase mask is introduced. By incorporating the surface function in the calculation, the point spread function of different surface phase masks is derived. This allows for the advanced prediction of the static model of the wavefront coding optical imaging system after the insertion of the phase mask. Experimental verification demonstrates that the aspherical phase mask can suppress high-light targets by over 200 times and successfully restore the image. This novel approach surpasses the limitations of traditional lens covers by effectively perceiving and addressing reverse light conditions.

关键词： wavefront coding phase mask high light smoothing magnification image restoration

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wavefront coding for athermalization of infrared imaging systems

Wavefront coding for athermalization of infrared imaging sys...

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Conference on Electro-Optical and Infrared Systems

作者： Muyo, G Harvey, AR Heriot Watt Univ Sch Engn & Phys Sci Edinburgh EH14 4AS Midlothian Scotland

ISBN: (纸本)0819455652

wavefront coding involves the insertion of an asymmetric refractive mask close to the pupil plane of an imaging system so as to encode the image with a specific point spread function that, when combined with decoding of the recorded image, can enable greatly reduced sensitivity to imaging aberrations. The application of wavefront coding has potential in the fields of microscopy, where increased instantaneous depth of field is advantageous and in thermal imaging where it can enable the use of simple, low-cost, light-weight lens systems. It has been previously shown that wavefront coding can alleviate optical aberrations and extend the depth of field of incoherent imaging systems whilst maintaining diffraction-limited resolution. It is particularly useful in controlling thermally induced defocus aberrations in infrared imaging systems. These improvements in performance are subject to a range of constraints including the difficulty in manufacturing an asymmetrical phase mask and significant noise amplification in the digitally restored image. We describe the relation between the optical path difference (OPD) introduced by the phase mask and the magnitude of noise amplification in the restored image. In particular there is a trade between the increased tolerance to optical aberrations and reduced signal-to-noise ratio in the recovered image. We present numerical and experimental studies based of noise amplification with the specific consideration of a simple refractive infrared imaging system operated in an ambient temperature varying from 0degreesC to +50 C. These results are used to delineate the design and application envelope for which infrared imaging can benefit from wavefront coding.

关键词： wavefront coding depth of field defocus athermalization noise amplification

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wavefront coding with adaptive optics

Wavefront coding with adaptive optics

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Conference on Adaptive Optics and wavefront Control for Biological Systems

作者： Agbana, Temitope E. Soloviev, Oleg Bezzubik, Vitalii Patlan, Vsevolod Verhaegen, Michel Vdovin, Gleb Delft Univ Technol Fac 3ME DCSC NL-2628 CD Delft Netherlands ITMO Univ St Petersburg 197101 Russia Flexible Opt BV NL-2288 GG Rijswijk Netherlands

ISBN: (纸本)9781628414257

We have implemented an extended depth of field optical system by wavefront coding with a micromachined membrane deformable mirror. This approach provides a versatile extension to standard wavefront coding based on fixed phase mask. First experimental results validate the feasibility of the use of adaptive optics for variable depth wavefront coding in imaging optical systems.

关键词： Depth of Field wavefront coding Deformable Mirror Imaging Adaptive Optics

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wavefront coding with Jacobi-Fourier phase masks 20

Wavefront coding with Jacobi-Fourier phase masks

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Conference on Current Developments in Lens Design and Optical Engineering XX

作者： Gonzalez-Amador, E. Padilla-Vivanco, A. Toxqui-Quitl, C. Olvera-Angeles, M. Arines, J. Acosta, E. Univ Politecn Tulancingo Ingn 100 Tulancingo 43629 Hidalgo Mexico Univ Santiago de Compostela Dept Fis Aplicada Fac Opt & Optometria Santiago De Compostela 15782 A Crouna Spain Univ Santiago de Compostela Dept Fis Aplicada Fac Fis Santiago De Compostela 15782 A Crouna Spain

ISBN: (数字)9781510629028

ISBN: (纸本)9781510629028

wavefront coding is a hybrid optical-computational technique that makes use of a phase modulating element in conjunction with a deconvolution algorithm to extend the depth of focus of imaging systems. The phase mask codes the wave-front in such a way that the point-spread function do not change appreciably as a function of defocus. In this work, the modulation is introduced by phase masks in the shape of a subset of Jacobi-Fourier polynomials. We will show, by both numerical simulations and experiments that the Jacobi-Fourier polynomial phase masks are good candidates for highresolution images under noise presence.

关键词： wavefront coding Jacobi-Fourier phase mask trefoil phase mask depth of focus Gaussian noise convolution-deconvolution

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An apodized cubic phase mask used in a wavefront coding system to extend the depth of field

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Chinese Physics B 2022年第5期31卷 422-428页

作者： Lina Zhu Fei Li Zeyu Huang Tingyu Zhao Department of Physics Key Laboratory of Optical Field Manipulation of Zhejiang ProvinceZhejiang Sci-Tech UniversityHangzhou 310018China

The point spread function(PSF)caused by a wavefront coding system with a cubic phase mask has big side-lobes which leads to bad image *** paper proposes a novel apodized cubic phase mask to suppress the side-lobes of the *** annealing algorithm is used to optimize the cubic and the truncation parameter of the phase *** system with the novel phase mask has better performance in the modulation transfer function(MTF)especially in low-and-medium spatial frequency *** simulation results show that the restored images with the novel phase mask are superior to the one with the classic cubic phase mask in contrast and ringing *** experimental results show that the side-lobes of the PSF are suppressed by using the apodized cubic phase mask.

关键词： apodized cubic phase mask wavefront coding depth of field image restoration

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Simple PSF based method for pupil phase mask’s optimization in wavefront coding system

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第2期8卷 180-185页

作者： ZHANG Wen-zi CHEN Yan-ping ZHAO Ting-yu YE Zi YU Fei-hong State Key Laboratory of Modern Optical Instrumentation Optical Engineering Department Zhejiang University Hangzhou 310027 China

By applying the wavefront coding technique to an optical system, the depth of focus can be greatly increased. Several complicated methods, such as Fisher Information based method, have already been taken to optimize for the best pupil phase mask in ideal condition. Here one simple point spread function (PSF) based method with only the standard deviation method used to evaluate the PSF stability over the depth of focus is taken to optimize for the best coefficients of pupil phase mask in practical optical systems. Results of imaging simulations for optical systems with and without pupil phase mask are presented, and the sharpness of image is calculated for comparison. The optimized results showed better and much more stable imaging quality over the original system without changing the position of the image plane.

关键词： wavefront coding Pupil phase mask Depth of focus PSF stability Optimization Sharpness Imaging simulation

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Athermalization of infrared annular folded lens based on wavefront coding

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OPTICS AND LASERS IN ENGINEERING 2024年 178卷

作者： Ma, Dechao Piao, Mingxu Zhao, Yuanming Zhang, Bo Zhang, Chengran Wang, Zhe Changchun Univ Sci & Technol Sch Optoelect Engn Changchun 130022 Peoples R China China Elect Technol Grp Corp Res Inst 27 Beijing Peoples R China

The annular folded lens (AFL) achieves miniaturization and integration of optical systems by single-element design. When over a wide temperature range, the AFL cannot be athermalized with one substrate material. In order to reduce the impact of temperature on imaging quality of the AFL, wavefront coding (WFC) technology is introduced. The WFC-AFL design principle is studied, the relationship between the obstruction ratio and the phase plate parameter is deduced, and the model of the obstruction ratio and the point spread function (PSF) consistency is established. In the digital decoding section, the image restoration effect of the PSF under different weights is studied, and the model of synthesized PSF is constructed using the genetic algorithm (GA). According to theory analysis, the infrared WFC-AFL with IRG26 is designed in the long-wave infrared 8 similar to 12 mu m. The focal length is 50 mm, the total length is 18 mm, the F-number is 1 and the full field of view is 11 degrees Image restoration with a single filter is achieved by using the synthetic PSF. For the restored images at -40 degrees C and 60 degrees C, the average SSIM values are improved by 0.0397 and 0.0141 respectively, the average PSNR values are improved by 1.9540db and 1.1077db respectively compared with common methods. The design provides a new idea for the athermalization of integrated and miniaturized optical systems.

关键词： Annular folded lens wavefront coding Athermalization Synthesized PSF Obstruction ratio

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