Nanophotonics, 2023 Achromatic lenses, which have the same focal length regardless of the illumination frequency, find strong applications in imaging, sensing, and communication systems.
Xiaoluo He, Alex M H Wong
exaly +3 more sources
Large‐Aperture Polarization‐Independent Broadband Achromatic All‐Dielectric Metalens for Terahertz Focusing [PDF]
Advanced ScienceAs a promising alternative to conventional lenses, terahertz (THz) achromatic metalenses with planar configurations are of great significance in broadband optical applications.
Xiaoqiang Jiang +7 more
doaj +2 more sources
Minimalist optical system for achromatic imaging within extended field of view based on monolithic integrated meta-axicon cluster [PDF]
Light: Science & ApplicationsAchromatic metalenses face stringent aperture and numerical aperture (NA) constraints, which have become a key bottleneck in metasurface imaging. To this end, a novel achromatic imaging method was first proposed, utilizing the unique wideband consistency
Jianli Wang +13 more
doaj +2 more sources
Nature inspired design methodology for a wide field of view achromatic metalens [PDF]
NanophotonicsMetalenses have become ubiquitous in academic research and have begun to make their transition to industry. However, chromatic aberration still greatly limits the applications of metalenses.
Engelberg Jacob +2 more
doaj +2 more sources
Effect of White and Yellow Background Colour on Short Term Memory: A Cross-over Study [PDF]
Journal of Clinical and Diagnostic Research, 2021 Introduction: Colour has a potential influence on learning by improving Short Term Memory (STM) in different settings. Background colours of study materials can have an impact on STM in healthy student population. Enhanced memory can improve academic
Mithun S Acharya +3 more
doaj +1 more source
A hybrid achromatic metalens [PDF]
Nature Communications, 2020 AbstractMetalenses, ultra-thin optical elements that focus light using subwavelength structures, have been the subject of a number of recent investigations. Compared to their refractive counterparts, metalenses offer reduced size and weight, and new functionality such as polarization control.
F. Balli +3 more
openaire +4 more sources
Robust Achromatic All-Dielectric Metalens for Infrared Detection in Intelligent Inspection
Sensors, 2022 Metalens has the advantages of high design freedom, light weight and easy integration, thus provides a powerful platform for infrared detection. Here, we numerically demonstrated a broadband achromatic infrared all-dielectric metalens over a continuous ...
Wenrong Si +4 more
doaj +1 more source
Diffractive Achromat with Freeform Slope for Broadband Imaging over a Long Focal Depth
Micromachines, 2023 We propose a method for designing a long-focal-depth diffractive achromat (LFDA). By applying rotational symmetric parameterization, an LFDA with a diameter of 10.89 mm is designed over three wavelengths at six focal planes.
Donghui Yi +4 more
doaj +1 more source
First record of albinism in the swell shark, Cephaloscyllium ventriosum (Elasmobranchii: Carcharhiniformes: Scyliorhinidae) [PDF]
Acta Ichthyologica et Piscatoria, 2017 We report the first record of albinism in the swell shark, Cephaloscyllium ventriosum (Garman, 1880). The specimen was caught off the southern part of the Baja California Peninsula, Mexico. The shark had no skin pigmentation and golden-coloured eyes. The
E.E. Becerril-García +3 more
doaj +3 more sources
Sensors, 2023 The remote sensing imaging requirements of aerial cameras require their optical system to have wide temperature adaptability. Based on the optical passive athermal technology, the expression of thermal power offset of a single lens in the catadioptric ...
Jing Li +4 more
doaj +1 more source