Results 121 to 130 of about 82,170 (356)

High‐Fidelity Computational Microscopy via Feature‐Domain Phase Retrieval

Advanced Science, EarlyView.
An innovative phase retrieval framework, termed FD‐PR, is uniquely established in the image's feature domain through the feature‐extracted, physical‐driven regression with interfaces for combining physics and image processing constraints. FD‐PR takes advantage of invariance components of an image against presences of model mismatch and uncertainty ...
Shuhe Zhang, An Pan, Hongbo Sun, Yidong Tan, Liangcai Cao   +4 more
wiley   +1 more source

Broadband, Wide‐Angle, and Versatile Metasurface Illusions with Inverse Synthetic Aperture Radar Imaging

Advanced Science, EarlyView.
“Illusion” is a captivating topic throughout human civilization. This research proposes an advanced multi‐layer metasurface illusion strategy utilizing a technique known as “inverse synthetic aperture radar (ISAR)” imaging, enabling the creation of illusions over broadband and wide‐angle.
Haoran Li, Kang Luo, Din Ping Tsai, Yulang Li, Linyuan Dou, Shuqiao Li, Tao He, Yuancheng Fan, Mu Ku Chen, Zhanshan Wang, Yuzhi Shi, Zeyong Wei, Xinbin Cheng   +12 more
wiley   +1 more source

Wavefront analysis and modulation transfer function of three multifocal intraocular lenses

Indian Journal of Ophthalmology, 2010
Purpose: To evaluate wavefront performance and modulation transfer function (MTF) in the human eye after the implantation of diffractive or refractive multifocal intraocular lenses (IOLs). Materials and Methods: This was a prospective, interventional,
Santhiago Marcony, Netto Marcelo, Barreto Jackson, Gomes Beatriz, Schaefer Arthur, Kara-Junior Newton   +5 more
doaj  

Pupil‐Adaptive Retina Projection Augment Reality Displays With Switchable Ultra‐Dense Viewpoints

Advanced Science, EarlyView.
This paper presents a seamless retina projection AR display with 49 switchable ultra‐dense viewpoints, achieving a record high rotation precision of 1.28°/viewpoint. With a light selector, only a singular image can be consistently perceived by eye‐tracking without image missing or overlapping regardless of dynamic pupil under different ambient lights ...
Haonan Jiang, Yuechu Cheng, Zhibo Sun, Zhengnan Yuan, Huajian Jin, Yipeng Huo, Man‐Chun Tseng, Fion Yeung, Hoi‐Sing Kwok, Enguo Chen   +9 more
wiley   +1 more source

Scanning Wavefront Sensor for Measurement of Highly Divergent Wavefronts

IFAC-PapersOnLine, 2019
Abstract This paper deals with the characterization of freeform optics by means of a wavefront sensor. Freeform optics show an increasing demand since they have the potential to improve optical system performance while reducing size, weight and complexity.
Georg Schitter, Martin E. Fuerst
openaire   +2 more sources

Complex wavefront reconstruction with single-pixel detector

Applied Physics Letters, 2019
Wavefront sensing is an essential tool in wide research areas. However, the auxiliary reference beam and the pixel-array detector are indispensable in most of the wavefront sensing schemes.
Ruifeng Liu, Shupeng Zhao, Pei Zhang, Hong Gao, Fuli Li   +4 more
semanticscholar   +1 more source

Natural Crystal Structure for Generating Raman‐Like Orbital Angular Momentum States

Advanced Science, EarlyView.
This work proposes a strategy for symmetry breaking of the degenerate OAM states relying on the natural anisotropy of crystal gain, to select the handedness of the spatial spiral phase front and further tunable Raman‐like OAM states by thermal‐driven, which clarifies the contribution of intrinsic crystal property to the OAM states and opens a new route
Tianxiang Meng, Changsheng Zheng, Yongguang Zhao, Haohai Yu, Huaijin Zhang   +4 more
wiley   +1 more source

A thorough study on genetic algorithms in feedback-based wavefront shaping

Journal of Innovative Optical Health Sciences, 2019
Feedback-based wavefront shaping focuses light through scattering media by employing phase optimization algorithms. Genetic algorithms (GAs), inspired by the process of natural selection, are well suited for phase optimization in wavefront shaping ...
Daixuan Wu, Jiawei Luo, Zhaohui Li, Yuecheng Shen   +3 more
semanticscholar   +1 more source

Multi‐Wavelength Achromatic 3D Meta‐holography with Zoom Function

Advanced Science, EarlyView.
Due to the wavelength mismatch, chromatic aberrations are inevitable in multi‐wavelength meta‐holography. Moreover, since the meta‐hologram is difficult to be refreshed, zoom meta‐holography has not been reported to date. This study proposes a multi‐wavelength achromatic 3D meta‐holography with a zoom function, breaking through both the chromatic ...
Chao Liu, Yi Zheng, Di Wang, Qian Huang, Xiao‐Wei Li, Fan‐Chuan Lin, You‐Ran Zhao, Yi‐Wei Zheng, Xiao‐Ke Lu, Xin‐Ru Li, Xin‐Ru Zheng, Xin Xie, Kun Song, Zhen‐Fei Li, Wei Lu, Din Ping Tsai, Ruo‐Nan Ji, Qiong‐Hua Wang   +17 more
wiley   +1 more source

Polarization‐Controlled Transmissive Plasmonic Color Filter Using a Dimer‐Aperture Array

Advanced Science, EarlyView.
An aluminum dimer aperture array plasmonic metasurface is proposed and fabricated to achieve efficient polarization‐color filtering with CMOS‐compatible materials. The structure's simultaneous polarization‐color filtering capability is shown using structural color generation, where color gamut coverage of 76% and extinction ratio over 20 is achieved ...
Shuhao Wu, Peter W.R. Connolly, Vincenzo Pusino, Gerald S. Buller, David R.S. Cumming   +4 more
wiley   +1 more source