Results 31 to 40 of about 128,668 (300)
Multifacet holographic optical elements [PDF]
ICALEO '83: Proceedings of the Information Processing and Holography Symposium, 1983 Holographic optical elements are an attractive alternative to conventional optical elements in systems using light with a narrow spectral bandwidth. The attributes of holographic optical elements include the capability of producing low f/number diffraction limited optics, and the ability to generate arbitrary wavefronts.
S. K. Case +3 more
openaire +1 more source
Frontiers in Physics, 2021 Modern Pepper's ghost—“floating hologram”—systems generally use transparent screens called half mirrors or foils. this system must have the same screen size as the image size in order to display a large-sized image.
Sungjae Ha +5 more
doaj +1 more source
Optics Express, 2021 The eye-tracking system plays an essential role in the augmented reality (AR) eyewear. Waveguide volume holographic optical elements (HOE) that can be made with high efficiency, thin form, and lightweight are well-suited for this application. Traditional
Jianbo Zhao +2 more
semanticscholar +1 more source
Volume diffraction gratings for optical telecommunications applications: design study for a spectral equalizer [PDF]
, 2004 The main characteristics required for a diffraction grating used for demultiplexing functions in spectral equalizing systems are investigated, both theoretically and experimentally.
Chevallier, Raymond +5 more
core +1 more source
Optics Express, 2021 Direct fabrication of complex diffractive optical elements (DOEs) on photosensitive thin films is of critical importance for the development of advanced optical instruments.
V. Cazac +6 more
semanticscholar +1 more source
Photolithographic fabrication method of computer-generated holographic interferograms [PDF]
, 1989 We consider the fabrication of high-quality interferogram-type diffractive optical elements with conventional photolithographic techniques and compare the results with those achievable with electron-beam lithography. The fringes associated with the phase
Byckling, Eero +6 more
core +1 more source
The parameters effect on the holographic optical elements
مجلة بغداد للعلوم, 2011 In this work we fabrication holographic optical element diffraction grating thickness 40?m and mirror90?m by using dichromated gelatin,to perform that we have to use the Nd-yaG laser doubling frequency of wavelenght (532)nm and its powers of (80)mWatt ...
Baghdad Science Journal
doaj +1 more source
One-step volumetric additive manufacturing of complex polymer structures. [PDF]
, 2017 Two limitations of additive manufacturing methods that arise from layer-based fabrication are slow speed and geometric constraints (which include poor surface quality). Both limitations are overcome in the work reported here, introducing a new volumetric
Browar, Allison EM +7 more
core +2 more sources
Holographic Solar Energy Concentrator Using Angular Multiplexed and Iterative Recording Method
IEEE Photonics Journal, 2016 Holographic optical elements can be fabricated to concentrate the solar energy with no sun tracking system. Concentrated diffraction efficiency (CDE) for the holographic solar concentrator is suggested as a new efficiency calculation method. The exposure
Jeong-Hyeon Lee +3 more
doaj +1 more source
Nature Communications, 2022 Fiber-based micro-endoscopes are minimally invasive, but 3D imaging is limited by the need for bulky optical elements or rigid fibers. Here, the authors demonstrate holographic imaging through flexible and dynamically bent multi-core fibers by adding ...
Noam Badt, Ori Katz
doaj +1 more source