Results 51 to 60 of about 165,986 (168)

A neutron microscope using a nested Wolter‐I condenser and a bank of diffractive–refractive achromatic objectives

Journal of Applied Crystallography, Volume 59, Issue 4, Page 1282-1293, August 2026.
A neutron microscope is presented comprising a Wolter‐I nested mirror optic as condenser and a 2D array of neutron achromats as objective.We present a nested Wolter‐I mirror design for a neutron condenser, which is based on established X‐ray telescope technology.
H. F. Poulsen, C. L. Andersen, N. Ravinet, J. Vila-Comamala, M. R. D. Veeraraj, E. B. Knudsen, P. K. Willendrup, S. Massahi, F. E. Christensen, D. D. M. Ferreira, M. Strobl, C. David, L. Theil Kuhn   +12 more
wiley   +1 more source

Circular Differential Scattering Spectroscopy for the Characterization of Single Chiral Nanostructures: Fundamentals, Development, and Perspectives

National Materials, Volume 1, Issue 1, Page 48-71, July 2026.
Circular differential scattering (CDS) spectroscopy relies on a modified dark‐field optical microscope to study single chiral nanostructures, avoiding the averaging effects of ensemble methods. Recently achieving improved detection limits of 1.5%, this robust technique analyzes plasmonic chirality and molecular interactions, with the future goal of ...
Hao Li, Carlos Renero‐Lecuna, Weihai Ni, Luis M. Liz‐Marzán   +3 more
wiley   +1 more source

Effect of the Fresnel membranous prism on the visual function.

JAPANESE ORTHOPTIC JOURNAL, 2007
[目的]フレネル膜プリズムの視機能への影響を比較検討する。[対象及び方法]対象は、視力や視機能に問題のない正常者9名9眼。年齢21～29(24.8±3.12)歳、屈折度は+0.5～-5.0(-1.47±1.63)D。完全矯正レンズ下の片眼に(1)6Δ(2)8Δ(3)10Δ(4)12Δ(5)15Δ(6)20Δ(7)30Δの7種の膜プリズムを基底外方に貼付し、1、視力2、コントラスト感度(AULCSF)3、グレアテスト4、波面センサーによる眼球高次収差と、前方散乱係数(コントラスト法)を測定し、それぞれ膜プリズムの有無による比較を行った。また、5、自覚的装用感についてのアンケートも行った。[結果]膜プリズム無しと比較して、1、2では8Δ以上の加入で有意な視力、AULCSFの低下 ...
Tsurudome, Yasuhiro, Asonuma, Sanae, Kojima, Yuka, Nakamae, Mika, Kanayama, Motoko, Fujiki, Kaori, Amano, Daisuke, Oka, Tomoko, Osawa, Yui, Takada, Yusuke, Bessho, Kenichiro, Fujikado, Takashi   +11 more
openaire   +2 more sources

In Situ SrF2 Crystallization in Transparent Germanate Glass‐Ceramics Driven by Erbium for NIR and MIR Applications

Journal of the American Ceramic Society, Volume 109, Issue 7, July 2026.
ABSTRACT Transparent oxyfluoride glass‐ceramics combining broad ultraviolet‐to‐mid‐infrared transmission with enhanced rare‐earth luminescence are promising materials for mid‐infrared photonic applications. In this work, erbium‐doped indium‐germanate oxyfluoride glasses exhibiting good glass‐forming ability under conventional melt–quenching conditions ...
Alizée Deslandes, Théo Guérineau, Thomas Meyneng, Jingxian Wang, François Weill, Thierry Cardinal, Younès Messaddeq   +6 more
wiley   +1 more source

A clinical case report of left homonymous hemianopia

African Vision and Eye Health
Introduction: Homonymous hemianopia (HH), which refers to defects in the same half of the visual field in each eye, results from lesions that are posterior to the optic chiasm.
Nishanee Rampersad, Shivani Naipal, Ashtaleena Bhawanibik, Siyathemba Andile Skam   +3 more
doaj   +1 more source

Generating Circularly Polarized Light Using Hybrid Near‐Zero and High‐Index Materials

Advanced Photonics Research, Volume 7, Issue 6, June 2026.
A flat‐optics approach to manipulating the polarization state of light is proposed using evanescent‐wave interactions in hybrid epsilon‐near‐zero and high‐index materials. The design enables linear‐to‐circular polarization conversion in a wavelength‐scale device design without depending on patterning or bulky optics and operates in both reflection and ...
Ben Johns, Hannes Kempf, Lakshmi Das, Aitor de Andrés, Nicolò Maccaferri   +4 more
wiley   +1 more source

A randomized crossover clinical trial of multi‐periscopic and Fresnel peripheral prism glasses for hemianopia

Optometry and Vision Science, Volume 103, Issue 6, June 2026.
Abstract Purpose To compare novel multi‐periscopic prisms (MPP; 42° field expansion) to commercial Fresnel peripheral prisms (FPP; 30° field expansion) as mobility devices to assist with pedestrian collision hazard detection when walking. Methods Participants with hemianopia without neglect or cognitive decline were recruited at 7 sites in a single ...
Alex R. Bowers, Sailaja Manda, Sandhya Shekar, Alex Daejoon Hwang, Jae‐Hyun Jung, Eli Peli   +5 more
wiley   +1 more source

Design of polychromatic focusing optics for neutron reflectometers: rethinking REFocus optics

Journal of Applied Crystallography, Volume 59, Issue 3, Page 774-782, June 2026.
REFocus optics, employing an elliptical mirror and higher‐order reflections, enable rapid wide‐Q‐range neutron reflectometry at reactor sources, achieving up to 100‐fold faster measurements compared with conventional methods.Neutron reflectometry is a widely used non‐destructive technique for analyzing surface and interfacial structures. In this study,
Norifumi L. Yamada, Masahiro Hino, Ryuji Maruyama, Takuya Hosobata   +3 more
wiley   +1 more source

Modeling of a BK7 prism/Ag/Ni/ZnSe/SM-based sensor for maintaining optimum performance in glucose level detection

Biosensors and Bioelectronics: X
Patients suffering from diabetes, or having problems regarding up-downs in glucose levels may need to prick human skin to draw blood samples for checkups. Due to the enhancement of photonics, surface plasmon resonance (SPR) is a relief to them. As of now,
Kazi Mustafizur Rahman
doaj   +1 more source

Determination of Optical Constants in the Mid-Infrared Spectral Range by use of the Attenuated Total Reflection Method [PDF]

Kemija u Industriji, 2010
Infrared (IR) spectroscopy is one of the most useful experimental methods in the investigation of hydrogen-bonded systems. However, application of transmission IR spectroscopy to aqueous systems is only of limited value due to the very strong water ...
Biliškov, N:
doaj