Long-Range, High-Resolution Camera Optical Design for Assisted and Autonomous Driving

Sahin, Furkan E.

doi:10.3390/photonics6020073

Cited by 24 publications

(18 citation statements)

References 14 publications

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“…Section 2 showed how surface deformation due to axial and radial stress caused by a mismatch in thermal expansion coefficients between glass and mechanical materials can degrade image quality. This method takes into account the effect of thermal-induced surface deformation and completes the optimization compared to conventional passive athermal optical design methods [8][9][10][11]. In contrast to the optical-mechanical-thermal integrated analysis [6,7,12,13], this method provides an optical optimization approach without complex structural optimization and thermal control design.…”

Section: Discussionmentioning

confidence: 99%

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Passive Athermal Optical Design Method Considering Thermal-Induced Surface Deformation

Liu

Chong

et al. 2021

Photonics

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Temperature variation not only results in changes in refractive index, radius, thickness, and air space, but also leads to surface deformation due to the mismatch in thermal expansion coefficients between glass and mechanical materials. However, existing passive athermal optical design methods cannot optimize thermal-induced surface deformation, and optimization methods usually focus on structural optimization or thermal control rather than optical optimization. Here, we investigate the deterioration in image quality caused by thermal-induced surface deformation and propose a passive athermal optical design method to reduce deterioration. To this end, MATLAB was utilized to jointly call finite element analysis (FEA) software (COMSOL) and optical design software (Code V) to realize the data exchange of an optical–mechanical–thermal integrated analysis for iterative optical optimization. This process makes automatic iterative optimization possible by transforming parametric FEA results into Zernike coefficients in each iteration of optimization. The theoretical and design examples indicate that our method can effectively reduce the degradation in image quality with surface deformation. Our method provides an optical optimization approach for optical designers to work on a passive athermal optical design by considering thermal-induced surface deformation.

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Section: Discussionmentioning

confidence: 99%

“…Rogers proposes the automated glass selection algorithm of Code V to select glasses that reduce the optical aberrations over temperature [10]. Furkan designed an athermalized lens for automotive cameras which could work from −40 • C to 100 • C [11]. However, both of the above studies are limited to lens material selection methods.…”

Section: Introductionmentioning

confidence: 99%

Passive Athermal Optical Design Method Considering Thermal-Induced Surface Deformation

Liu

Chong

et al. 2021

Photonics

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“…Щоб задовольнити вимоги до роздільної здатності та атермальних умов експлуатації для автомобільної камери дальнього радіуса дії, за основу було взято п'ятилінзовий об'єктив [6] й оптимізовано його до вимог дослідження з кращим склом Шотта [10]…”

Section: розрахунок атермальних матеріалівunclassified

High Resolution Camera Design Planning Theoretical Foundations for Driving Systems

Stadnichuk¹,

Kolobrodov²,

Mosolab³

et al. 2021

KPI SN

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Background. Analysis of statistical data showed that in most cases the cause of the accident is driver error and, as a consequence, violation of traffic rules. In this regard, over the past 10 years, active developments in the field of recognition of road signs and other obstacles in the path of a car have been actively developing. Car manufacturers offer ready-made built-in systems, mounted behind the interior rearview mirror and connected to the car’s on-board computer, which carries out further control of the car in a critical situation. The main disadvantage of these systems of this class is the low range of recognition of road signs, the dependence of optical parameters on temperature and low light sensitivity. Objective. The purpose of the paper is to model an athermal objective for a high-resolution camera, investigate the characteristics of lenses depending on the ambient temperature. Methods. Analysis and modeling of objectives, lenses, optical glass from different materials. Results. A high-resolution camera objective for all types of cars is proposed. An athermal objective was developed for a high-resolution camera. Conclusions. The optimized athermal design of the visible spectrum objective for long-range car cameras is considered. Car cameras typically have a fixed focus, and forward-facing cameras typically require relatively long focal lengths to provide information about distant objects. The optical system for these cameras should provide high resolution, as well as operate in a wide range of ambient temperatures. The camera design parameters are derived from the functional requirements of road sign recognition at a distance of 200 m. The objective design has five lenses with spherical surfaces. The objective has a relative aperture of f/2 and a modulation transfer function (MTF) of more than 0.5 at 111 l/mm over the entire temperature range.

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“…The free version is limited to 12 optical surfaces (object surface, 10 lens surfaces, and the image plane). Even though this is a small number of surfaces, complex optical system designs can be accomplished within this limit [36].…”

Section: Synopsysmentioning

confidence: 99%

Software tools for optics massive open online courses

Sahin

2020

Comp Applic In Engineering

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Massive open online courses (MOOCs) provide anyone with an Internet connection easy access to a wealth of learning and computer training opportunities. Optics and photonics devices are frequently used in numerous academic fields and industries. Therefore, a MOOC approach to optics education would be beneficial to many students, researchers, and professionals all over the world, as this would empower personal and professional development with global reach. As part of online education, students can learn professional computer modeling tools and use them for completing course assignments. In this paper, several optical design packages are reviewed and evaluated for their applicability to MOOC optics education in terms of availability, functionality, and wealth of training resources. An example of an optics MOOC case-study is also presented.

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Long-Range, High-Resolution Camera Optical Design for Assisted and Autonomous Driving

Cited by 24 publications

References 14 publications

Passive Athermal Optical Design Method Considering Thermal-Induced Surface Deformation

Passive Athermal Optical Design Method Considering Thermal-Induced Surface Deformation

High Resolution Camera Design Planning Theoretical Foundations for Driving Systems

Software tools for optics massive open online courses

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