Results 61 to 70 of about 2,414 (173)
Defective structure and photorefractive properties of double doped crystals LiNbO3 : Fe : Mg and LiNbO3 : Fe : Zn [PDF]
Физико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2018 A comparative analysis of photorefractive properties was carried out for congruent, stoichiometric and double doped lithium niobate crystals: LiNbO3 : Fe(0,009) : Mg(5,04) and LiNbO3 : Fe(0,02) : Zn(4,34) mol %.
N.A. Teplyakova +2 more
doaj +1 more source
Radiation Modification of Optical Characteristics of LiNbO3:Zn and LiNbO3:Mg Crystals
Crystals, 2022 The modification of the optical characteristics of LiNbO3:Zn and LiNbO3:Mg crystals grown by the Czochralski method was investigated using β and γ radiation.
Mikhail Palatnikov +4 more
doaj +1 more source
Nanophotonics, Volume 14, Issue 26, Page 4761-4771, December 2025.Abstract Periodically poled thin‐film lithium niobate (TFLN) crystals are the fundamental building block for highly‐efficient quantum light sources and frequency converters. The efficiency of these devices is strongly dependent on the interaction length between the light and the nonlinear material, scaling quadratically with this parameter ...
Laura Bollmers +5 more
wiley +1 more source
Deep Learning Method for Accessible Eccentric Photorefraction
IEEE International Symposium on Biomedical ImagingAffordable and accessible screening tools are crucial to diagnose and, hence, effectively address vision impairment. We propose a novel pipeline based on photorefraction which complies with these requirements.
Mathieu Vu +5 more
semanticscholar +1 more source
Drive-by Photoscreening: Plusoptix, 2WIN and Blinq Amblyopia Detection During the COVID-19 Pandemic
Clinical Ophthalmology, 2021 Mason Keffalos,1 Samuel Martin,2 Robert Arnold2 1Boise State University, Boise, ID, USA; 2Alaska Blind Child Discovery, Anchorage, AK, USACorrespondence: Robert ArnoldAlaska Blind Child Discovery, Alaska Children’s EYE & Strabismus, 3500 ...
Keffalos M, Martin S, Arnold R
doaj
Delayed-onset bilateral abducens paresis after head trauma
Indian Journal of Ophthalmology, 2012 Bilateral sixth nerve paresis following closed head injury, though rare, is a known entity. However, delayed-onset post-traumatic bilateral abducens paresis is extremely rare. We present two cases.
Pravin Salunke +2 more
doaj +1 more source
Accuracy and precision of a sphero‐cylindrical over‐refraction app for smartphones
Ophthalmic and Physiological Optics, Volume 45, Issue 7, Page 1662-1675, November 2025.Abstract Purpose To evaluate the accuracy and precision of a web‐based smartphone app designed to measure sphero‐cylindrical over‐refraction. Methods A total of 307 healthy young subjects (22.5 ± 3.4 years) underwent clinical subjective refraction. In addition to each subject's refractive correction, spherical and cylindrical errors from −1.50 to 0.00 ...
Rosa Maria Salmeron‐Campillo +5 more
wiley +1 more source
Dynamic distance direct ophthalmoscopy, a novel technique to assess accommodation in children
Indian Journal of Ophthalmology, 2012 Aim: To describe and compare dynamic distance direct ophthalmoscopy (DDDO) with dynamic retinoscopy (DR) in assessment of accommodation in children. Materials and Methods: This prospective observational study had four components.
Mihir Kothari +5 more
doaj +1 more source
, 2008 We theoretically investigate collision of optical beams travelling in opposite directions through a centrosymmetric photorefractive crystal biased by a spatially non-uniform voltage.
A. Ciattoni +14 more
core +1 more source
Nonlinear self-phase matching of optical second harmonic generation in lithium niobate [PDF]
, 1996 We show that the nonlinear index perturbation due to light-induced photovoltaic space-charge field in LiNbO3 can give rise to self-phase matching of second harmonic generation.
Orlov, Sergei +2 more
core +1 more source