Results 41 to 50 of about 27,968 (274)

Achromatic and Resolution Enhancement Light Field Deep Neural Network for ZnO Nematic Liquid Crystal Microlens Array

Advanced Photonics Research, 2023
Nematic liquid‐crystal microlens arrays (LC‐MLAs) often exhibit chromatic aberration and low resolution, severely compromising their optical imaging quality.
Hui Li, Tian Li, Si Chen, Yuntao Wu
doaj   +1 more source

All-silicon polarization-independent broadband achromatic metalens designed for the mid-wave and long-wave infrared.

Optics Express, 2023
Metasurfaces demonstrate excellent capabilities in manipulating the phase, amplitude and polarization of light. Metalens, as a typical kind of metasurface devices, shows great prospect in simplifying imaging systems.
Song Yue, Yuxin Liu, Ran Wang, Yu Hou, Haiyan Shi, Yanming Feng, Zhidong Wen, Zichen Zhang   +7 more
semanticscholar   +1 more source

Achromatic diffractive lens limits

, 2020
Over the recent years, there have been many reports of achromatic metalenses and diffractive lenses. However, very few (if any) practical applications of such achromatic flat lenses have been demonstrated, which raises questions about the potential of ...
Jacob Engelberg (10782798), Uriel Levy (1491874)   +1 more
core   +1 more source

Polarization Independent Achromatic Meta-Lens Designed for the Terahertz Domain

Frontiers in Physics, 2020
In recent years, metasurface-based focusing elements have gradually become an indispensable type of terahertz lenses. However, the meta-lens often suffers from chromatic aberration due to the intrinsic dispersion of each element, especially in the ...
Yufei Gao, Jianqiang Gu, Ridong Jia, Zhen Tian, Chunmei Ouyang, Jiaguang Han, Weili Zhang, Weili Zhang   +7 more
doaj   +1 more source

Ultra-broadband achromatic metalens with high performance for the entire visible and near-infrared spectrum

Results in Physics, 2023
Metalenses provide unprecedented opportunities to overcome the limitations of conventional refractive lenses, which have been extensively studied to achieve achromatic focusing and imaging in various wavebands. However, it is a challenging task to create
Yechuan Zhu, Guangmin Yuan, Ying Chang, Shun Zhou, Chunfang Wu, Yao Li, Weiguo Liu   +6 more
doaj   +1 more source

Design of achromatic hybrid metalens with secondary spectrum correction.

Optics Express, 2023
Metasurface can be used in combination with singlet refractive lens to eliminate chromaticity, in which the metasurface usually works as a dispersion compensator.
Yanhao Chu, Xin-Chao Xiao, Xin Ye, Chen Chen, Shining Zhu, Tao Li   +5 more
semanticscholar   +1 more source

Achromatic synesthesias - A functional magnetic resonance imaging study

, 2014
Grapheme–color synesthetes experience consistent, automatic and idiosyncratic colors associated with specific letters and numbers. Frequently, these specific associations exhibit achromatic synesthetic qualities (e.g. white, black or gray). In this study,
Ríos-Lago, Marcos, Peña Melián, Ángel, Melero Carrasco, Helena, Álvarez-Linera, Juan   +3 more
core   +1 more source

Apochromatic X-ray focusing

Light: Science & Applications, 2023
Achromatic doublets are combinations of two individual lenses designed to focus different wavelengths of light in the same position. Apochromatic optics are improved versions of the achromatic schemes which extend the wavelength range significantly. Both
Umut T. Sanli, Griffin Rodgers, Marie-Christine Zdora, Peng Qi, Jan Garrevoet, Ken Vidar Falch, Bert Müller, Christian David, Joan Vila-Comamala   +8 more
doaj   +1 more source

Inverse design of high-efficiency long-wave infrared achromatic metalenses based on an optical diffraction neural network framework [PDF]

APL Photonics
Metalenses offer a promising path toward ultra-compact achromatic optical systems. However, conventional achromatic metalens designs based on hyperbolic phase profiles face limitations, as practical meta-atoms cannot fully satisfy ideal phase ...
Yutong Di, Yuanyang Wu, Tuo Yang, Ping Xu, Yiling Sun, Haixuan Huang, Siwei Long, Xulin Zhang, Haidong Xu, Shuai Geng, Mengyu Wang, Yuchao Ma, Hanliang Yuan, Guijun Li, Lei Lei, Xuanming Zhang   +15 more
doaj   +1 more source

Large-scale achromatic flat lens by light frequency-domain coherence optimization

Light: Science & Applications, 2022
Flat lenses, including metalens and diffractive lens, have attracted increasing attention due to their ability to miniaturize the imaging devices. However, realizing a large scale achromatic flat lens with high performance still remains a big challenge ...
Xin-Chao Xiao, Yun-wu Zhao, Xin Ye, Chen Chen, Xinmou Lu, Y. Rong, Junhong Deng, Guixin Li, Shining Zhu, Tao Li   +9 more
semanticscholar   +1 more source