Article
Computer Science, Software Engineering
Istvan Csoba, Roland Kunkli
Summary: This paper introduces a new simulation method for visual aberrations that runs at interactive, near real-time performance on commodity hardware and supports arbitrary types of aberrations. By utilizing a custom parametric eye model and parameter estimation method, along with a GPU-based interpolation scheme and convolution approach, the method achieves its goal effectively.
COMPUTER GRAPHICS FORUM
(2021)
Article
Optics
Jiaqi Ren, Yingjie Zhou, Zhenglong Shao, Chen Zhu, Fan Fan, Dongliang Tang
Summary: Conventional optical imaging systems often face difficulties in integrating multiple lenses to eliminate chromatic aberration. Planar optical elements, such as metasurfaces and liquid crystals, have been developed as feasible solutions for flexible and lightweight systems. However, they still suffer from chromatic aberration, which can be corrected but requires complex device design. In this study, a geometric-phase-based axi-con lens is used along with a post-process algorithm to correct chromatic aberration across a wide range of wavelengths. The experimental results show significant improvement in reconstruction quality after applying the post-process algorithm. This work is expected to contribute to the development of reducing dispersion through both device design and computational image techniques.
Article
Biochemical Research Methods
Carmen M. Lago, Alberto De Castro, Clara Benedi-Garia, Sara Aissati, Susana Marcos
Summary: Adaptive optics (AO) visual simulators are excellent platforms for non-invasive simulation visual performance with new intraocular lens (IOL) designs. Researchers measured the through focus visual acuity in subjects with a new refractive IOL physically inserted in a cuvette and projected onto the eye's pupil. The IOL increased depth-of-focus (DOF) while maintaining high visual acuity.
BIOMEDICAL OPTICS EXPRESS
(2022)
Article
Optics
Mireille Quemener, Nicolas Gregoire, Steeve Morency, Daniel Cote, Simon Thibault
Summary: The GRIN-axicon is a versatile component capable of generating high-quality scalable Bessel-Gauss beams, suitable for both larger-scale laboratory setups and miniaturized all-fiber optical setups. It allows easy control of the dimensioning of the generated focal line and is fabricated using characteristics suitable for the modified chemical vapor deposition (MCVD) process.
Article
Multidisciplinary Sciences
Jiamin Wu, Yuduo Guo, Chao Deng, Anke Zhang, Hui Qiao, Zhi Lu, Jiachen Xie, Lu Fang, Qionghai Dai
Summary: The article introduces an integrated scanning light-field imaging sensor that enables high-speed aberration-corrected three-dimensional photography. The sensor captures extra-fine four-dimensional light-field distributions through a vibrating coded microlens array, allowing for flexible and precise synthesis of complex-field-modulated images. Experimental results demonstrate that the sensor achieves high-performance photography and accurate depth mapping in different environments.
Article
Chemistry, Analytical
Kunhua Zhou, Zhizheng Wu, Tianyu Zhang, Feng Li, Azhar Iqbal, Suresh Sivanandam
Summary: A laser scanning confocal microscope (LSCM) is widely used in the field of biological detection to study sub-micron structures. However, the optical aberrations introduced by living biological tissue limit the illumination depth of LSCMs and affect the image resolution. In this study, an image-based adaptive optics technology with an optimized stochastic parallel gradient descent (SPGD) algorithm and adaptive coefficient is proposed to minimize the effect of optical aberrations. Experimental results show that this adaptive optics system effectively reduces aberration interference during depth imaging.
Article
Optics
Jakub Belin, Johannes Courtial, Tomas Tyc
Summary: Lens stars are composed of identical thin lenses arranged in a regular star shape, suitable for building ideal-lens TO devices. Ray trajectories in lens stars are found to be piecewise straight approximations of conic sections, and the concept is extended to Platonic lenses for further study. The research contributes to the understanding of TO with ideal lenses.
Article
Optics
Alireza Aghasi, Barmak Heshmat, Leihao Wei, Moqian Tian
Summary: This study focuses on defining and prioritizing quantized levels of depth for future head mounted displays and lightfield displays. The results show that on average 1731 stereoscopic and 7 monocular depth levels would saturate human depth perception, with the first 3 depth levels allocated at specific distances to minimize monocular error in the population. The study provides fundamental guidelines for designing optimal near eye displays, light-field monitors, and 3D screens.
Article
Multidisciplinary Sciences
Wei Chen, Ryan G. Natan, Yuhan Yang, Shih-Wei Chou, Qinrong Zhang, Ehud Y. Isacoff, Na Ji
Summary: Studying neuronal activity at synapses requires high spatiotemporal resolution, which can be achieved through adaptive optics to correct sample-induced aberrations at depth for high spatial resolution. The combination of Bessel focus with two-photon fluorescence microscopy allows for fast volumetric imaging at subcellular lateral resolution. The developed AO method corrects distorted wavefront of Bessel focus at the objective focal plane, demonstrating significant improvements in sensitivity and resolution of structural and functional measurements of synapses in vivo.
NATURE COMMUNICATIONS
(2021)
Article
Optics
Alba M. Paniagua-Diaz, Juan Mompean, Pablo Artal
Summary: This study demonstrates the potential of vertical-aligned spatial light modulators for adaptive-optics visual simulators and tests them with a custom adaptive-optics system. The results show that the modulators can achieve a corrected field of view of approximately 13 degrees, indicating their applicability for wearable visual adaptive optics systems.
OPTICAL ENGINEERING
(2022)
Article
Optics
Haiquan Hu, Tingting Jiang, Yueting Chen, Zhihai Xu, Qi Li, Huajun Feng
Summary: This article proposes a method to optimize chromatic aberrations in telescopic systems through two stages of optimizing the DOE and post-processing neural network. The results show that the optimized DOEs improve the results, and the gradient descent optimized DOE with U-Net performs the best in the case of simulated chromatic aberrations, validating the effectiveness of our algorithm.
Article
Optics
Jinhan Ren, Kyu Young Han
Summary: A novel 2.5D microscopy technique using a spatial light modulator (SLM) in a polarization insensitive configuration is reported, showing improved detection efficiency and aberration correction. Quantitative RNA imaging of mammalian cells demonstrates enhanced efficiency with a 2-fold increase in fluorescence intensity compared to conventional SLM-based microscopy, while imaging thick specimens with fewer z-scanning steps showcases aberration correction capabilities and extended depth of field.
Article
Optics
Craig T. Draper, Pierre-Alexandre Blanche
Summary: This paper examines the limits of pupil replication in waveguide displays, establishes relationships between key parameters, proposes a method to mitigate image doubling, and provides a solution for projecting images at different distances, which is important for certain applications.
Article
Computer Science, Artificial Intelligence
Chung-Hao Chao, Chang-Le Liu, Homer H. H. Chen
Summary: Conventional stereoscopic displays cause visual fatigue due to a conflict between the eyes' vergence and accommodation. Integral-imaging-based displays address this issue by projecting sub-aperture views of a light field directly into the eyes, but there is a trade-off between angular and spatial resolutions. This paper proposes a novel coded time-division multiplexing technique that projects encoded sub-aperture views with correct cues for the eyes, providing high-resolution refocused images with minimal aliasing through joint optimization of the sub-aperture views and the coded aperture pattern using deep learning.
IEEE TRANSACTIONS ON IMAGE PROCESSING
(2023)
Article
Ophthalmology
Susmi Deepu, Evon Selina Kujur, Saban Horo, Nancy Priyanka, Satheesh Solomon T. Selvin, Thomas Kuriakose
Summary: The study found that in presbyopic patients, the accommodative reserve when prescribing near addition is typically two to three times the theoretical recommendation, suggesting that the patient's accommodative ability may be insufficient. As age increases, there is a positive correlation between amplitude of accommodation and near addition in the eyes.
INDIAN JOURNAL OF OPHTHALMOLOGY
(2021)
Article
Ophthalmology
Renfeng Xu, Pete Kollbaum, Larry Thibos, Norberto Lopez-Gil, Arthur Bradley
OPHTHALMIC AND PHYSIOLOGICAL OPTICS
(2018)
Article
Ophthalmology
Jose J. Esteve-Taboada, Paula Bernal-Molina, Robert Montes-Mico, Teresa Ferrer-Blasco
GRAEFES ARCHIVE FOR CLINICAL AND EXPERIMENTAL OPHTHALMOLOGY
(2018)
Article
Optics
Maciej M. Bartuzel, D. Robert Iskander, Ivan Marin-Franch, Norberto Lopez-Gil
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION
(2019)
Article
Optics
Larry N. Thibos, Arthur Bradley, Renfeng Xu, Norberto Lopez-Gil
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION
(2019)
Article
Optics
Renfeng Xu, Larry N. Thibos, Norberto Lopez-Gil, Pete Kollbaum, Arthur Bradley
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION
(2019)
Review
Ophthalmology
Antonio J. Del Aguila-Carrasco, Philip B. Kruger, Francisco Lara, Norberto Lopez-Gil
CLINICAL AND EXPERIMENTAL OPTOMETRY
(2020)
Article
Ophthalmology
Rosa Maria Salmeron-Campillo, Mateusz Jaskulski, Sergio Lara-Canovas, Jose Manuel Gonzalez-Meijome, Norberto Lopez-Gil
JOURNAL OF OPHTHALMOLOGY
(2019)
Article
Ophthalmology
Francisco Lara, Antonio J. Del Aguila-Carrasco, Ivan Marin-Franch, Resurreccion Riquelme-Nicolas, Norberto Lopez-Gil
OPTOMETRY AND VISION SCIENCE
(2020)
Article
Ophthalmology
Juan F. Zapata-Diaz, Miguel A. Rodriguez-Izquierdo, Nassima Ould-Amer, Jeronimo Lajara-Blesa, Norberto Lopez-Gil
JOURNAL OF REFRACTIVE SURGERY
(2020)
Article
Ophthalmology
Francisco Lara-Lacarcel, Ivan Marin-Franch, Vicente Fernandez-Sanchez, Resurreccion Riquelme-Nicolas, Norberto Lopez-Gil
Summary: The study found that there are small changes in both the power and axis of astigmatism during accommodation, especially when convergence is involved. These changes in astigmatism may be attributed to shifts in the position of the crystalline lens during accommodation.
OPHTHALMIC AND PHYSIOLOGICAL OPTICS
(2021)
Article
Ophthalmology
Juan F. Zapata-Diaz, Hema Radhakrishnan, W. Neil Charman, Norberto Lopez-Gil
JOURNAL OF OPTOMETRY
(2019)
Article
Ophthalmology
Paula Bernal-Molina, Jose J. Esteve-Taboada, Teresa Ferrer-Blasco, Robert Montes-Mico
JOURNAL OF OPTOMETRY
(2019)
Article
Ophthalmology
Antonio J. Del Aguila-Carrasco, Francisco Lara, Paula Bernal-Molina, Resurreccion Riquelme-Nicolas, Ivan Marin-Franch, Jose J. Esteve-Taboada, Robert Montes-Mico, Philip B. Kruger, Norberto Lopez-Gil
JOURNAL OF OPTOMETRY
(2019)
Article
Ophthalmology
Ivan Marin-Franch, Renfeng Xu, Arthur Bradley, Larry N. Thibos, Norberto Lopez-Gil
JOURNAL OF OPTOMETRY
(2018)
