Results 21 to 30 of about 4,729 (265)
Photonics, 2022 Theoretical modelling has been used to calculate the holographic recording beam angles required in air (at any recording wavelength) to produce a Volume Holographic Optical Element (VHOE) for any defined input and output beam angles. The approach is used
Dipanjan Chakraborty +6 more
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Laser Finger Print Sensor with Holographic Grating
مجلة بغداد للعلوم, 2004 Design and Construction system for recording Finger print by laser, and separted the signal to noise by holographic element, was done. For safety, total reflection lighting ensures hat aser earns an not enter An operators eyes.
Baghdad Science Journal
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Photonics, 2021 The representation of three-dimensional volumetric pixels, voxels, is an important issue for the near-to-eye displays (NEDs) to solve the vergence-accommodation conflict problem. Although the holographic waveguides using holographic optical element (HOE)
Jiwoon Yeom, Yeseul Son, Kwangsoon Choi
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Projection-type see-through holographic three-dimensional display
Nature Communications, 2016 The design of holographic displays usually involves a trade-off between size and viewing angle. Here, the authors combine holographic projection with a digitally designed holographic optical element so that display size and the visual angle can be ...
Koki Wakunami +8 more
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Ultrathin wide-angle large-area digital 3D holographic display using a non-periodic photon sieve
Nature Communications, 2019 3D holographic displays still face many challenges such as small viewing angle and image size. Here the authors present a scalable method for displaying large holographic images with a wide viewing angle using a wide-angle diffracting element in a flat ...
Jongchan Park +2 more
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Holographic acoustic elements for manipulation of levitated objects [PDF]
Nature Communications, 2015 AbstractSound can levitate objects of different sizes and materials through air, water and tissue. This allows us to manipulate cells, liquids, compounds or living things without touching or contaminating them. However, acoustic levitation has required the targets to be enclosed with acoustic elements or had limited manoeuvrability.
Marzo, Asier +5 more
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Journal of Chemistry, 2022 Chronic subjective dizziness (CSD) is a chronic, subjective, nonrotational dizziness and instability caused by mental or physical factors, and patients generally have no existing vestibular system diseases.
Huanwen Luo +3 more
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A Fast Computer-Generated Holographic Method for VR and AR Near-Eye 3D Display
Applied Sciences, 2019 A fast computer-generated holographic method with multiple projection images for a near-eye VR (Virtual Reality) and AR (Augmented Reality) 3D display is proposed.
Xin Yang, HongBo Zhang, Qiong-Hua Wang
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Comparison of holographic photopolymer materials by use of analytic nonlocal diffusion models
, 2002 The one-dimensional diffusion equation governing holographic grating formation in photopolymers, which includes both nonlocal material response and generalized dependence of the rate of polymerization on the illuminating intensity, has been previously ...
Lawrence, Justin R. +3 more
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Thickness variation of self-processing acrylamide-based photopolymer and reflection holography
, 2001 There are many types of holographic recording material. The acrylamide-based recording material examined here has one significant advantage: it is self-processing.
Lawrence, Justin R. +3 more
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