Measurement of the chief ray angle of mobile phone camera

Yang, Ho‐Soon; Jo, Yong-Geol; Kim, Gyu-Ug; Lee, Yun-Woo

doi:10.1007/s10043-011-0077-0

Cited by 3 publications

(1 citation statement)

References 6 publications

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“…Hence, the designer must understand the value of optical aberration and tolerance for a variety of the optical system's residual aberrations, so that the design can correspond with the size of residual aberration of the optical system's imaging quality. The evaluation method of optical system imaging quality [6,7,8] includes modulation transfer function (MTF), the chief ray angle (CRA) and tolerance analysis.…”

Section: Aberration Correction and Image Quality Evaluationmentioning

confidence: 99%

Designing a video laryngoscope imaging system with a 7mm blade for neonatal patients

2018

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When a newborn infant has been pushed from the birth canal due to ventilation failure while using a resuscitation mask, the doctor must implement infant intubation and other emergency steps to keep the baby alive. However, due to the excessively small mouth area of a newborn or premature infant, the doctors are unable to view the glottis entrance, which can lead to either a failed intubation or longer intubation time, thereby resulting in either a drop in oxygen levels or a rise in intrathoracic pressure. Although the normal video laryngoscope with a 12mm metal blade certainly improves this type of difficult intubation, nevertheless, doctors often complain that the depth of field (DOF) is insufficient and the width of the blade is too wide when performing intubation on neonatal patients. Therefore, this study aims to develop two modules of infant’s video laryngoscope, an ultra-thin 7mm metal blade and an optical imaging system, the core technology of which includes an optical design of a 2.5mm lens and verifications of imaging quality. In order to allow physicians to determine the infant’s airway position immediately and to avoid the binocular disparity from a physician while giving intubation, this study has simulated the optical properties of monolithic lenses while designing the imaging system, allowing the doctor to have a clearer and undistorted image within the field of view.

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Section: Aberration Correction and Image Quality Evaluationmentioning

confidence: 99%

Designing a video laryngoscope imaging system with a 7mm blade for neonatal patients

2018

View full text Add to dashboard Cite

show abstract

Designing A Video Laryngoscope Imaging System with A 7-mm Blade for Neonatal Patients

2018

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When a newborn infant has been pushed from the birth canal due to ventilation failure while using a resuscitation mask, the doctor must implement infant intubation and other emergency steps to keep the baby alive. However, due to the excessively small mouth area of a newborn or premature infant, the doctors are unable to view the glottis entrance, which can lead to either a failed intubation or longer intubation time, thereby resulting in either a drop in oxygen levels or a rise in intrathoracic pressure. Although the normal video laryngoscope with a 12mm metal blade certainly improves this type of difficult intubation, nevertheless, doctors often complain that the depth of field (DOF) is insufficient and the width of the blade is too wide when performing intubation on neonatal patients. Therefore, this study aims to develop two modules of infant's video laryngoscope, an ultra-thin 7mm metal blade and an optical imaging system, the core technology of which includes an optical design of a 2.5mm lens and verifications of imaging quality. In order to allow physicians to determine the infant's airway position immediately and to avoid the binocular disparity from a physician while giving intubation, this study has simulated the optical properties of monolithic lenses while designing the imaging system, allowing the doctor to have a clearer and undistorted image within the field of view.

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Design strategy for an automotive lens with a wide field of view

Xie,

Sun,

Xue

et al. 2024

Appl. Opt.

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To solve the problems in designing a wide field of view (FOV) automotive lens, such as the complicated initial structure solution when using aberration theory and the limited scaling method, a novel design strategy, to the best of our knowledge, based on the compression ratio of field angle is proposed. The wide-FOV automotive lens is first divided into two groups, front and rear lenses, and each group is designed with several parallel plates as starting points using SYNOPSYS software. Then, the two groups are connected as a whole initial optical system. Finally, an iterative process is applied to improve the performance of the initial structure. A wide-FOV automotive lens is designed to verify the feasibility and effectiveness of the design method proposed in this paper. The wide-FOV automotive lens has the characteristics of good imaging quality, large aperture, and small size and consists of six spherical lenses. The result of the design indicates that this method based on the compression ratio of field angle is simple, effective, fast in convergence, and provides a good starting point for the design of a wide-FOV automotive lens.

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Measurement of the chief ray angle of mobile phone camera

Cited by 3 publications

References 6 publications

Designing a video laryngoscope imaging system with a 7mm blade for neonatal patients

Designing a video laryngoscope imaging system with a 7mm blade for neonatal patients

Designing A Video Laryngoscope Imaging System with A 7-mm Blade for Neonatal Patients

Design strategy for an automotive lens with a wide field of view

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