Results 51 to 60 of about 27,968 (274)

Achromatic impulses unmask L- and M-cone adaptive mechanisms

, 2001
The mechanisms underlying the adaptive response for achromatic impulses seen on achromatic fields were investigated. Foveal thresholds were measured for a static probe-impulse under two conditions of adaptation.Thresholds were obtained under gain-clamped
Zele, Andrew J., Andrew J Zele, Algis J Vingrys, Vingrys, Algis J.   +3 more
core   +1 more source

An achromatic metasurface waveguide for augmented reality displays

Light: Science & Applications
Augmented reality (AR) displays are emerging as the next generation of interactive platform, providing deeper human-digital interactions and immersive experiences beyond traditional flat-panel displays.
Zhongtao Tian, Xiuling Zhu, P. Surman, Zhidong Chen, X. Sun   +4 more
semanticscholar   +1 more source

Broadband achromatic and wide field-of-view single-layer metalenses in the mid-infrared.

Optics Express, 2023
Metalenses are considered a promising solution for miniaturizing numerous optical systems due to their light weight, ultrathin thickness and compact size.
Fan Xu, Wenjie Chen, Ming Li, Peng Liu, Yuhang Chen   +4 more
semanticscholar   +1 more source

Photoreceptor processing speed and input resistance changes during light adaptation correlate with spectral class in the bumblebee, Bombus impatiens.

, 2011
Colour vision depends on comparison of signals from photoreceptors with different spectral sensitivities. However, response properties of photoreceptor cells may differ in ways other than spectral tuning. In insects, for example, broadband photoreceptors,
Skorupski, P, Lars Chittka, Chittka, L, Peter Skorupski   +3 more
core   +1 more source

Achromatic terahertz quarter-wave Fresnel rhomb retarder

, 2023
Achromatic terahertz (THz) quarter-wave retarder is widely desired to manipulate the polarization states of broadband THz beams, which are essential for spectroscopic applications, such as circular dichroism spectroscopy and steering THz vortex beams.
Tomarchio, Luca, Macis, Salvatore, Petrarca, Massimo, Mou, Sen, D'Arco, Annalisa, Lupi, Stefano   +5 more
core   +1 more source

Achromatic number of $K_5 \times K_n$ for small $n$

, 1995
summary:The achromatic number of a graph $G$ is the maximum number of colours in a proper vertex colouring of $G$ such that for any two distinct colours there is an edge of $G$ incident with vertices of those two colours.
Fu, Hung-Lin, Pčola, Štefan, Chiang, Nam-Po, Horňák, Mirko   +3 more
core   +1 more source

Color‐Pure Organic Luminophores: Characteristics, Definitions, Physical Basis and Fundamental Design Principles

Angewandte Chemie, EarlyView.
Color‐pure all‐organic emitters, i.e., with narrow spectral characteristics, are intensively studied for high‐definition organic LEDs and multi‐color bioimaging. In order to guide targeted materials design, this educative review discusses spectral characteristics, proper definitions and units, and the physical basis of spectral broadening, to distill ...
Johannes Gierschner, Sunwu Song, Siyang Feng, Liangxuan Wang, Miguel Ródenas, Begoña Milián‐Medina, Min Sang Kwon   +6 more
wiley   +2 more sources

Achromatic acoustic generalized phase-reversal zone plates

New Journal of Physics, 2022
We report an achromatic acoustic generalized phase-reversal zone plate by harnessing the response of dipole and monopole, which eliminate the chromatic aberration of conventional zone plates.
Gaokun Yu, Xinyu Zou, Peifeng Wang
doaj   +1 more source

Automated achromatic perimetry

Oman Journal of Ophthalmology, 2018
Visual field (VF) testing is an important diagnostic tool for Glaucoma. The current gold standard for VF testing is automated perimetry. This article is an attempt to familiarize the reader with components of an achromatic (white on white) automated perimetry printout. It addresses use of Humphrey perimeter to interpret the results.
Anand Aggarwal, Kanika Chhabra, Prempal Kaur, Karamjit Singh, Indu Khosa, Pulkit Bansal   +5 more
openaire   +3 more sources

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

Advancement of science
With the development of nanofabrication technology, meta‐holography has shown unprecedented potential for light regulation. However, due to the wavelength mismatch, chromatic aberrations are inevitable in multi‐wavelength meta‐holography. Moreover, since
Chao Liu, Yi Zheng, Di Wang, Qian Huang, Xiao-Wei Li, Fan-Chuan Lin, Youngjun Zhao, Yi Zheng, Xiao-ke Lu, Xin-Ru Li, Xin-Ru Zheng, Xin Xie, Kun Song, Zhenfei Li, Wei Lu, Din Ping Tsai, Ruo-Nan Ji, Qiong‐Hua Wang   +17 more
semanticscholar   +1 more source