Results 31 to 40 of about 45,495 (276)

Design of a Prism-Grating Wide Spectral Range Transmittance Imaging Spectrometer

Sensors, 2023
As spectroscopic detection technology rapidly advances, back-illuminated InGaAs detectors with a wider spectral range have emerged. Compared to traditional detectors such as HgCdTe, CCD, and CMOS, InGaAs detectors offer a working range of 400–1800 nm and
Xu Zhang, Bo Li, Xue Jiang, Guochao Gu, Hanshuang Li, Xiaoxu Wang, Guanyu Lin   +6 more
doaj   +1 more source

An all metasurface-based fiber needle probe for Raman spectroscopy

Frontiers in Physics, 2022
Optical fiber-based spectroscopy sensors are widely used for industrial and biomedical applications. They normally consist of at least one excitation fiber and one collection fiber.
Shuyan Zhang, Renzhe Bi, Ruochong Zhang, Yi Qi, Rasyiqah Bte Shaik Mohamed Salim, Rasyiqah Bte Shaik Mohamed Salim, Malini Olivo   +6 more
doaj   +1 more source

A whiter shade of pale, a blacker shade of dark: Parameters of spatially induced blackness [PDF]

, 2006
The surface-mode property of “blackness” is induced by simultaneous contrast with an adjacent, more luminant surround. As numerous studies have shown, the degree of blackness induced within an achromatic test field is a function of the relative ...
Bimler, David L., Izmailov, Ciingis A., Paramei, Galina V.   +2 more
core   +1 more source

Metalens-Based Miniaturized Optical Systems

Micromachines, 2019
Metasurfaces have been studied and widely applied to optical systems. A metasurface-based flat lens (metalens) holds promise in wave-front engineering for multiple applications.
Bo Li, Wibool Piyawattanametha, Zhen Qiu
doaj   +1 more source

Doublet Metalens with Simultaneous Chromatic and Monochromatic Correction in the Mid-Infrared

Sensors, 2022
Metalenses provide a powerful paradigm for mid-infrared (MIR) imaging and detection while keeping the optical system compact. However, the design of MIR metalenses simultaneously correcting chromatic aberration and off-axis monochromatic aberration ...
Yi Zhou, Fengyuan Gan, Ruxue Wang, Dun Lan, Xiangshuo Shang, Wei Li   +5 more
doaj   +1 more source

Colour Text Segmentation in Web Images Based on Human Perception [PDF]

, 2007
There is a significant need to extract and analyse the text in images on Web documents, for effective indexing, semantic analysis and even presentation by non-visual means (e.g., audio).
A. Antonacopoulos, Antonacopoulos, Antonacopoulos, Bedford, Clark, D. Karatzas, Jain, Kim, Lopresti, Messelodi, Moghaddamzadeh, Silverstein, Wyszecki   +12 more
core   +2 more sources

Effects in polarimetry of interference within wave plates [PDF]

, 2005
Multiple-beam interference within wave plates is investigated in terms of the detrimental effects it produces in the data of stellar spectropolarimetry.
Clarke, Clarke, Clarke, Clarke, Clarke, Clarke, Clarke, Clarke, Clarke, D. Clarke, Donati, Harries, Klare, Pancharatnam, Semel, Stewart, Tinbergen   +16 more
core   +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

The complex light-curve of the afterglow of GRB071010A [PDF]

, 2008
We present and discuss the results of an extensive observational campaign devoted to GRB071010A, a long-duration gamma-ray burst detected by the Swift satellite.
A. Cucchiara, A. Klotz, A. Kpc Yolda, A. Moretti, A. V. Filippenko, Achterberg, Amati, Amati, B. Gendre, Band, Berger, Berger, Bersier, Bertin, Beuermann, Bianco, Bloom, Bringer, Burrows, C. Clemens, C. Guidorzi, Calzetti, Campana, Chandra, Chevalier, Chincarini, Conconi, Covino, Covino, Covino, Covino, Covino, Covino, Curran, D. A. Kann, D. A. Perley, D. B. Fox, D. Fugazza, D. Guetta, D. Kocevksi, D. Poznanski, Dado, Dai, de Ugarte Postigo, Devillard, Dickey, E. Berger, E. Maiorano, E. Meurs, E. Molinari, E. Palazzi, E. Rossi, F. D'Alessio, F. Vitali, F. Zerbi, Falcone, Fynbo, G. Chincarini, G. Olofsson, G. Stratta, G. Tagliaferri, Galama, Gehrels, Ghirlanda, Ghisellini, Gorosabel, Greiner, Greiner, Guetta, Guidorzi, Guidorzi, J. Fynbo, J. Greiner, J. M. Silverman, J. S. Bloom, Jakobsson, Jhannesson, Jin, K. Misra, Kann, Kann, Klotz, Klotz, Kobayashi, Krimm, L. A. Antonelli, L. Amati, L. Stella, Lazzati, Lazzati, Lazzati, Lazzati, Liang, Lithwick, M. Ber, M. Della Valle, M. Modjaz, Maiorano, Malesani, Molinari, Monet, Moretti, Mszros, N. Masetti, N. Primak, Nakar, Nava, Norris, Nousek, P. D'Avanzo, P. Goldoni, P. Romano, Panaitescu, Panaitescu, Panaitescu, Pe'er, Pei, Perley, Prochaska, R. J. Foley, R. Roy, Rees, Rol, Rossi, Rykoff, S. B. Pandey, S. Campana, S. Covino, S. D. Vergani, S. di Serego Alighieri, S. Piranomonte, Salmonson, Sari, Sari, Sari, Schlegel, Shen, Sollerman, Staff, Starling, Stetson, Stratta, Strutskie, Tagliaferri, V. D'Elia, V. Testa, Vietri, Vitali, Zerbi, Zhang, Zhang   +150 more
core   +8 more sources

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