Results 21 to 30 of about 4,697 (265)
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.
Shigapova, N.M. +12 more
core +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
A Novel Approach for Measurement of Free-Form Optical Elements with Digital Holographic Microscopy
Micromachines, 2022 Free-form optical elements face significant challenges in high-precision measurement due to their high complexity and non-rotational symmetry. Digital holographic microscopy (DHM), as one of the methods for the measurement of free-form optical elements ...
Xuhui Zhang +4 more
doaj +1 more source
Application of a liquid crystal spatial light modulator to laser marking [PDF]
, 2011 Laser marking is demonstrated using a nanosecond (ns) pulse duration laser in combination with a liquid crystal spatial light modulator to generate two-dimensional patterns directly onto thin films and bulk metal surfaces.
Rainer J. Beck +7 more
core +1 more source
Operation of Holographic Elements with Broadband Light Sources [PDF]
, 2005 This thesis presents the theoretical and experimental investigation of volume holography operated with broadband/polychromatic light sources, i.e., in both continuous-wave (linear) and femtosecond-pulse (nonlinear) regimes.
Hsieh, Hung-Te
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Simulation of superresolution holography for optical tweezers [PDF]
, 2008 Optical tweezers manipulate microscopic particles using foci of light beams. Their performance is therefore limited by diffraction. Using computer simulations of a model system, we investigate the application of superresolution holography for two ...
Thomson, L.C. +14 more
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Wavefront Characteristics of a Digital Holographic Optical Element
Micromachines, 2023 In this study, a 50 × 50 mm holographic optical element (HOE) with the property of a spherical mirror was recorded digitally on a silver halide photoplate using a wavefront printing method. It consisted of 51 × 96 hologram spots with each spot measuring 0.98 × 0.52 mm.
Beom-Ryeol Lee +5 more
openaire +3 more sources
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
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
Photonics, 2021 An optical see-through two-dimensional (2D)/three-dimensional (3D) compatible display using variable-focus lens and multiplexed holographic optical elements (MHOE) is presented. It mainly consists of a MHOE, a variable-focus lens and a projection display
Qinglin Ji +5 more
doaj +1 more source