Eliminating lateral color aberration of a high-resolution digital projection lens using a novel genetic algorithm

Fang, Yi-Chin; Wu, Bowen; Liu, Tung-Kuan

doi:10.1117/1.2759527

Cited by 6 publications

(4 citation statements)

References 11 publications

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“…A parametric surface equation is used to model the focal length and distortion relationship. For a given focal length, the experimental approach Fang et al [28] take, finds first-order fitting sufficient for their application; the optical design theory calculated by Gross et al [37] concurs with this. However it has been seen in practice, that simple firstorder LCA correction is insufficient.…”

Section: Parameter Modellingmentioning

confidence: 70%

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Chromatic Aberration Recovery on Arbitrary Images

Blueman¹

2021

Preprint

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Digital imaging sensor technology has continued to outpace development in optical technology in modern imaging systems. The resulting quality loss attributable to lateral chromatic aberration is becoming increasingly significant as sensor resolution increases; other classes of aberration are less significant with classical image enhancement (e.g. sharpening), whereas lateral chromatic aberration becomes more significant. The goals of higherperformance and lighter lens systems drive a recent need to find new ways to overcome resulting image quality limitations.This work demonstrates the robust and automatic minimisation of lateral chromatic aberration, recovering the loss of image quality using both artificial and real-world images. A series of test images are used to validate the functioning of the algorithm, and changes across a series of real-world images are used to evaluate the performance of the approach.The primary contribution of this work is introduced: a novel algorithm to robustly minimise lateral chromatic aberration in both calibration and real-world images. This is broken down into discrete steps and detailed. The basis of the algorithm uses chromatic correspondences to converge a set of distortion coefficients. Other contributions are then introduced: a second algorithm is developed to allow correction information to be correlated to the lens model and parameters. This information is subsequently stored in a database to allow offline correction of unseen images. Finally, an algorithm is developed to measure image fidelity in a way more relevant to how the Human Visual System processes information via spatial frequency analysis.Algorithm validation is conducted through a series of steps to ensure correctness, then artificial and test images are analysed, and the quantification algorithm is applied to measure improvement. Lastly, the performance of this system is compared against prevailing methods and analysed.

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Section: Parameter Modellingmentioning

confidence: 70%

“…In optimising lens design for lower CA (and other aberrations), Fang introduced the use of genetic algorithms [28]. This addressed the complexity associated with lens element selection from the wide variety of lens elements available, and from a range of sources.…”

Section: Lens-system Optical Correctionmentioning

confidence: 99%

Chromatic Aberration Recovery on Arbitrary Images

Blueman¹

2021

Preprint

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“…As a result, efficiently assisting optical designers in quickly selecting the optimal combination of chromatic aberrations for bifocal glass lens has become a significant research focus. Previous academic studies have mainly concentrated on optimizing the optical design to reduce lens chromatic aberration, with limited research addressing the practical needs of bifocal glass lens [1][2][3][4][5]. Therefore, this research aims to develop an optimized analysis approach that enables the swift selection and optimization of chromatic aberration quality for bifocal glass lens.…”

Section: Introductionmentioning

confidence: 99%

Research on the Development of Chromatic Aberration Selection Model for Optical Bifocal Glass Lens

Wu,

Hsueh,

Lin

et al. 2023

J. Phys.: Conf. Ser.

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This research aims to develop a model for selecting bifocal glass lens based on their formal design, configuration, and optical properties, particularly chromatic aberration. The model optimization integrates Taguchi-Fuzzy theoretical analysis. By utilizing the Fuzzy theory system along with Taguchi L9 orthogonal table, the model achieves high-precision experimental results with a minimal number of designs, leading to the identification of the optimal design combination. The first section of the study explains the motivation behind the research and conducts a literature review to analyze the optical quality parameters of bifocal glass lens. The second section focuses on the analysis of lens optical lateral and longitudinal chromatic aberrations, optimizing the chromatic aberration model through the application of the Taguchi-Fuzzy experimental method. The feasibility of the model is then validated through variance analysis. Finally, the third section provides a summary of the bifocal glass lens selection model, highlighting its contributions to design, practicality, analysis, innovation, and overall advancements in the field.

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“…All of these have already exceeded the capacity of the traditional zoom system. As a result, imaging issues have become urgent problems in optical design waiting to be resolved [4][5][6][7] . Some available technologies, like aspherical surface, anti-reflective coating and diffractive optical element (DOE), have been employed to remove major aberration like chromatic aberration and mono aberration then enhance image quality of optical system.…”

Section: Introductionmentioning

confidence: 99%

Optical design and optimization of zoom optics with diffractive optical element

Fang

Lin

2009

4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technolo

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The optical design of 350X zoom lens with Diffractive Optical Element (DOE) is demonstrated at the proposal. This lens is composed of front elements, a zoom motor group and a compensation group. The compensation group is specially designed to meet the further step motors under the control of DSP chips. Besides, location of DOE will be determined by HTGA (Hybrid Taguchi Genetic Algorism) for further elimination of chromatic aberration. The results show that regardless of whether chromatic aberration is axial or longitudinal, issues concerning the optical lens's DOE location could be determined and chromatic aberration could be significantly reduced.

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Eliminating lateral color aberration of a high-resolution digital projection lens using a novel genetic algorithm

Cited by 6 publications

References 11 publications

Chromatic Aberration Recovery on Arbitrary Images

Chromatic Aberration Recovery on Arbitrary Images

Research on the Development of Chromatic Aberration Selection Model for Optical Bifocal Glass Lens

Optical design and optimization of zoom optics with diffractive optical element

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