Results 31 to 40 of about 378,095 (341)
Optics Express, 2021 Diffractive optical elements (DOEs) may be used as a single optical component with dedicated functionality (e.g. focusing), or as one of the elements in complex hybrid optical systems to reduce the number of the elements and improve imaging quality. It is desirable to cover DOE’s
Grzegorz Fluder +6 more
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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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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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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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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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Frontiers in Physics, 2022 Conventional studies on digital hologram printer have mainly been conducted on image generation and reconstruction such as multi-view image generation method, computer-generated hologram (CGH) and a method of displaying a wave-front for a 3D object ...
Leehwan Hwang +6 more
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Diffraction efficiency calculations of polarization diffraction gratings with surface relief [PDF]
Journal of Physics: Conference Series, 2018 In this paper, we evaluate the optical response of a stack of two diffraction gratings of equal one-dimensional periodicity. The first one is a surface-relief grating structure; the second, a volume polarization grating. This model is based on our experimental results from polarization holographic recordings in azopolymer films.
Nazarova D. +5 more
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Band-edge-induced Bragg diffraction in two-dimensional photonic crystals [PDF]
, 2006 Two-dimensional photonic crystals composed of two orthogonal volume diffraction gratings have been photogenerated in photopolymers. When the read beam is set at the Bragg angle, the diffraction efficiency of the transmission grating is strongly enhanced ...
Chevallier, Raymond +5 more
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Photonics, 2021 Glasses-free augmented reality (AR) 3D display has attracted great interest in its ability to merge virtual 3D objects with real scenes naturally, without the aid of any wearable devices.
Jiacheng Shi +4 more
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Electromagnetically Induced Grating of Surface Polaritons via Coherent Population Oscillation
Photonics, 2022 We propose a scheme to study the electromagnetically induced grating (EIG) of surface polaritons (SPs) in a negative index metamaterial/rare-earth-ion-doped crystal interface waveguide system, based on coherent population oscillation (CPO) modulating by ...
Yu Duan, Shengyan Liu, Chaohua Tan
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