Results 21 to 30 of about 390,346 (343)
Analytic Design of Segmented Phase Grating for Optical Sensing in High-Precision Alignment System
Sensors, 2021 Ultra-precision measurement systems are important for semiconductor manufacturing processes. In a phase grating sensing alignment (PGA) system, the measurement accuracy largely depends on the intensity of the diffraction signal and its signal-to-noise ...
Guanghua Yang +4 more
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Improvement in the diffraction efficiency of a polymer using an ionic liquid [PDF]
Journal of the Serbian Chemical Society, 2018 In this paper, photosensitive materials for information storage devices are presented. The polymers were prepared using surface relief-grating (SRG) fabrication with a diode-pumped solid-state (DPSS) laser of 532 nm, and the diffraction efficiency (DE ...
Kim Sung Ho, Attri Pankaj, Kim In Tae
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Efficient diffractive phase optics for electrons [PDF]
New Journal of Physics, 2014 Electron diffraction gratings can be used to imprint well-defined phase structure onto an electron beam. For example, diffraction gratings have been used to prepare electron beams with unique phase dislocations, such as electron vortex beams, which hold promise for the development of new imaging and spectroscopy techniques for the study of materials ...
Tyler R Harvey +5 more
openaire +2 more sources
Gels, 2023 The role of volume hydrogel holographic gratings as optical transducers in sensor devices for point-of-care applications is increasing due to their ability to be functionalized for achieving enhanced selectivity.
Paola Zezza +4 more
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Optimization of the diffraction efficiency in photorefractive crystals [PDF]
, 2017 The aim of this work is to study and to optimize the diffraction efficiency in sillenite BTO crystals. A theoretical analysis, where the effects of coupling beams are significant,is carried on. In addition, non-mobile transmission gratings are considered.
Arias Hernández, Néstor Alonso +3 more
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Optimization of parameters of multilayer diffraction gratings using needle variations
Известия высших учебных заведений. Поволжский регион: Физико-математические науки, 2022 Background. The purpose of the work is to optimize the diffraction efficiency in the first diffraction order of a multilayer diffraction grating. Material and methods. Needle variations are used to optimize diffraction efficiency.
V.Yu. Martynova +2 more
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Design of a Hybrid Refractive/Diffractive Lens System for Broadband UV
Sensors, 2022 Traditional broadband UV optical designs often have complex structural problems and cannot meet the current requirements of light and miniaturization.
Yuan Hu, Jiaqi Huo, Binpeng Cheng
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Large bandwidth, highly efficient optical gratings through high index materials [PDF]
, 2008 We analyze the diffraction characteristics of dielectric gratings that feature a high index grating layer, and devise, through rigorous numerical calculations, large bandwidth, highly efficient, high dispersion dielectric gratings in reflection ...
Baldry +17 more
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Applied Sciences, 2022 The high-precision diffraction grating is an important chromatic dispersion component that has been widely used in many fields, including laser beam combining, chirped pulse compression, spectroscopy, among others.
Ye Wang +5 more
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Comparative analysis of the Fresnel lens and the kinoform lens [PDF]
Компьютерная оптика, 2018 Based on a unified approach in the ray approximation, the focusing properties of Fresnel lenses and kinoform lenses are considered and compared. Particular attention is paid to the energy efficiency, chromatic focal shift and resolving power of these ...
Grigoriy Greisukh +2 more
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