Results 61 to 70 of about 45,495 (276)
Advanced Science, EarlyView.A compact eight‐channel electrically tunable varifocal metalens with three single‐layer polarization‐multiplexed bi‐focal metalens and three LC cells. The total thickness of the device is ∼6 mm, while the focal lengths can be switched among eight values (3.6, 4.2, 4.5, 4.9, 6.2, 6.9, 8.4, and 9.6 mm). ABSTRACT As an essential module of optical systems,
Zhiyao Ma +11 more
wiley +1 more source
Two-parameter Hong-Ou-Mandel dip
, 2019 A modification of the standard Hong-Ou-Mandel interferometer is proposed which allows one to replicate the celebrated coincidence dip in the case of two-independent delay parameters.
Giovannetti, Vittorio +2 more
core +1 more source
High-efficiency broadband achromatic metalens for near-IR biological imaging window
Nature Communications, 2021 Though broadband achromatic metalens are attractive for biological applications, existing metalenses show limited performance in the biological imaging window.
Yujie Wang +10 more
doaj +1 more source
Luminance cues constrain chromatic blur discrimination in natural scene stimuli [PDF]
, 2013 Introducing blur into the color components of a natural scene has very little effect on its percept, whereas blur introduced into the luminance component is very noticeable.
McGraw, Paul V. +2 more
core +2 more sources
Advanced Intelligent Systems, Volume 7, Issue 3, March 2025.Herein, a patient‐mounted neuro optical coherence tomography system that integrates a 5 degrees‐of‐freedom skull‐mounted robot (Skullbot) with a 0.6 mm neuroendoscope for targeted, minimally invasive deep brain imaging, is developed. The system offers high‐resolution imaging with precise deployment, demonstrated through successful tumor imaging in a ...
Chao Xu +7 more
wiley +1 more source
Error analysis of polarization imaging system based on Mueller matrix
Physics OpenThis study investigates the influence mechanisms of achromatic and non-achromatic properties on polarization detection errors in polarization imaging technology. Its primary objective is to quantitatively analyze how retarder thickness, retarder material,
Juncai He, Tingyu Yan, Yi Chen
doaj +1 more source
New Journal of Physics, 2023 The main challenge in designing broadband achromatic metalenses is to achieve the desired phase distribution at different wavelengths and positions. Finding the exact relationship between phase modulation and the size or shape of individual nanopillars ...
Cheng Zhang +6 more
doaj +1 more source
X-ray interferometry with transmissive beam combiners for ultra-high angular resolution astronomy
, 2009 Interferometry provides one of the possible routes to ultra-high angular resolution for X-ray and gamma-ray astronomy. Sub-micro-arc-second angular resolution, necessary to achieve objectives such as imaging the regions around the event horizon of a ...
Krizmanic, J. F., Skinner, G. K.
core +1 more source
Diffractive X-ray Telescopes [PDF]
, 2010 Diffractive X-ray telescopes using zone plates, phase Fresnel lenses, or related optical elements have the potential to provide astronomers with true imaging capability with resolution several orders of magnitude better than available in any other ...
Skinner, Gerald K.
core +3 more sources
Advanced Intelligent Systems, EarlyView.This work presents a robot‐assisted Doppler optical coherence tomography system for autonomous, wide‐field intraoperative assessment of microvascular anastomoses. Machine‐vision–guided probe positioning and adaptive scan planning enable three‐dimensional structural and hemodynamic imaging over extended vessel segments.
Xiaochen Li +10 more
wiley +1 more source