Results 41 to 50 of about 7,347,419 (286)

Analysis of polarization aberrations of the off-axis pupil freeform optical system

iScience
Summary: Freeform surfaces are widely used in off-axis pupil optical systems with large apertures, wide fields of view, and long focal lengths. Polarization effects in such systems significantly influence imaging quality.
Chenjie Gong, Yilan Zhang, Wancheng Liu, Jiayu Wang, Qiang Fu, Haodong Shi   +5 more
doaj   +1 more source

Collimating lens for light-emitting-diode light source based on non-imaging optics

, 2012
A collimating lens for a light-emitting-diode (LED) light source is an essential device widely used in lighting engineering. Lens surfaces are calculated by geometrical optics and nonimaging optics.
Wang, Lili, Wang, Guangzhen, Li, Fuli, Zhang, Gongjian   +3 more
core   +1 more source

High-performance deep-ultraviolet optics for free-electron lasers

, 2022
S.3236-3241Working with wavelengths shorter than the deep ultraviolet involves the development of dedicated optics for free-electron lasers with devoted coating techniques and characterizations.
Torchio, P., Kohlhaas, J., Trovo, M., Heber, J., Marsi, M., Kaiser, N., Garzella, D., Gatto, A., Thielsch, R., Ristau, D., Walker, R., Günster, S., Couprie, M.E., Amra, C., Alvisi, M.   +14 more
core   +1 more source

Exercise Capacity, Physical Activity, Fatigue, and Neurocognitive Function in Adult Survivors of Childhood Acute Lymphoblastic Leukemia

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Adult survivors of childhood acute lymphoblastic leukemia (ALL) are at risk of reduced exercise capacity, decreased physical activity levels, persistent fatigue, and neurocognitive deficits. The aim was to investigate exercise capacity and physical activity levels of adult survivors of childhood ALL and their associations with ...
Laura Jess, Gustaf Glavå, Simon Skau, Hans‐Georg Kuhn, Maria Bäck, Marianne Jarfelt   +5 more
wiley   +1 more source

Diamond machined transmissive gratings for the thermal infrared range (TIR) [PDF]

EPJ Web of Conferences
Diffraction gratings are the core component of many scientific instruments in applications such as remote sensing or astronomical spectroscopy. Increasing demands on spectral resolution, efficiency and low stray light performance are driving the ...
Steinkopf Ralf, Weide Peter, Heusinger Martin, Benkenstein Tino, Herffurth Tobias, Kinast Jan, Pelaez Santos Alba Eva, Smid Pieter   +7 more
doaj   +1 more source

Characterization of diffractive bifocal intraocular lenses

Scientific Reports, 2023
Multifocal intraocular lenses incorporate a variety of design considerations, including dimensioning of the base monofocal shape and the diffraction grating.
Damian Mendroch, Stefan Altmeyer, Uwe Oberheide   +2 more
doaj   +1 more source

Polarization Snapshot Imaging Spectrometer for Infrared Range

Photonics, 2023
Infrared imaging spectrometers detect and identify targets by collecting spectral and image information. However, when detecting small temperature differences and dynamic targets, the accuracy of infrared detection is reduced, the traditional scanning ...
Hongcheng Tao, Jinguang Lv, Jingqiu Liang, Baixuan Zhao, Yupeng Chen, Kaifeng Zheng, Yingze Zhao, Weibiao Wang, Yuxin Qin, Guohao Liu, Kaiyang Sheng   +10 more
doaj   +1 more source

Bubble optics: upward emerging ray paths

, 2022
S.9188-9199Light scattered by floating bubbles is a fascinating everyday phenomenon and a relevant issue for climate science and remote sensing. Here, we discuss light scattering in the upward hemisphere in the geometrical optics (GO) approximation for ...
Lock, J.A., Selmke, M.
core   +1 more source

Effectiveness of Resistance Intradialytic Exercise Compared to Aerobic Intradialytic Exercise for Patients With Chronic Kidney Disease: A Randomized Controlled Clinical Trial

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Background Patients with chronic kidney disease undergoing hemodialysis commonly experience reduced physical function, fatigue, poor sleep quality, and impaired health‐related quality of life. Intradialytic exercise has been proposed as a non‐pharmacological strategy to improve these outcomes.
Klebson da Silva Almeida, Gisela Cristiane Miyamoto, Daniel da Costa Torres, Ian Setubal Reis Chaves, Jonas do Carmo Paschoalin, Braúlio Lima Nascimento, Luciana Dias Chiavegato   +6 more
wiley   +1 more source

All-silicon terahertz metasurfaces for multi-focus multiplexed polarization generation

iScience
Summary: Polarization multiplexing enhances communication capacity but faces material limitations requiring complex device cascading. This paper proposes a strategy for generating multiple polarization states by combining geometric phase and propagation ...
Susu Hu, Yongzheng Lu, Tianchen Tang, Li Wei, Bo Dai, Songlin Zhuang, Dawei Zhang   +6 more
doaj   +1 more source