Results 101 to 110 of about 28,100 (252)
Resolution improvement methods applied to digital holography [PDF]
This thesis discusses the creation, acquisition and processing of digital holograms. Several techniques to improve the optical resolution have been investigated and developed.
Claus, Daniel
core
Optical holography in dichromated gelatin [PDF]
, 1987 Coupled wave theory is used to investigate the properties of high quality holograms recorded in dichromated gelatin. Initially, the properties of planar reflection gratings are studied in order to characterize the behaviour of the recording material in ...
Newell, John Christopher William. +1 more
core +2 more sources
Development of double nearfield acoustic holography method (Basic experimental results)
Nihon Kikai Gakkai ronbunshu, 2019 There are several types of sound localization methods. In middle frequency around 1kHz, these methods are effective to detect the sound source location.
Masao NAGAMATSU
doaj +1 more source
Journal of High Energy PhysicsAbstract We consider the collective field theory description of the singlet sector of a free and massless matrix field in d dimensions. The k-local collective fields are functions of (d − 1)k + 1 coordinates. We provide a map between the collective fields and fields in the dual gravitational theory defined on AdS d+1 ...
Robert de Mello Koch +1 more
openaire +4 more sources
Laser &Photonics Reviews, EarlyView.Bayesian optimization combined with in situ quantitative phase imaging enables autonomous correction of layer‐height deviations in projection multi‐photon lithography. By jointly tuning model parameters and grayscale exposure settings, the method achieves more uniform and accurate layers within 300 prints, offering a fast, data‐efficient route to ...
Jason E. Johnson, Xianfan Xu
wiley +1 more source
Wavelength and Full‐Polarization Encrypted Orbital Angular Momentum Meta‐Holography
Laser &Photonics Reviews, EarlyView.By multiplexing three independent degrees of freedom of light, a single‐layer geometric‐phase metasurface encrypts 24 distinct holographic images across 3 wavelengths, 12 pairs of orthogonal polarizations, and 4 OAM channels, taking advantage of axial chromatic dispersion to reconstruct the color images at the same plane. ABSTRACT Multiplexing multiple
Yue Han +5 more
wiley +1 more source
Multiwavelength digital holography in the presence of vibrations: laterally resolved multi-step phase-shift extraction [PDF]
, 2019 Paper Tu4B.5, 2 S.With the application of multiwavelength digital holography in rough environments such as machine tools, we cannot rely on the complete absence of vibration.
Tobias Beckmann +11 more
core +1 more source
Journal of High Energy PhysicsA bstract We derive and test a novel holographic duality in the B-model topological string theory. The duality relates the B-model on certain Calabi-Yau three-folds to two-dimensional chiral algebras defined as gauged βγ
Kevin Costello, Davide Gaiotto
openaire +3 more sources
Grating‐Lens Empowered Metafiber for Large‐Angle Light Collection With 3D Nanoprinted Structures
Laser &Photonics Reviews, EarlyView.A grating‐lens‐based Metafiber enables efficient light coupling into single‐mode fibers at large incidence angles. By combining diffraction and focusing on the fiber facet using a 3D nanoprinted holographic structure, light is selectively coupled only at specific angles while suppressing unwanted signals. This approach achieves high coupling efficiency
Jun Sun, Markus A. Schmidt
wiley +1 more source
A holographic system for subsea recording and analysis of plankton and other marine particles (HOLOMAR) [PDF]
, 2003 We report here details of the design, development, initial testing and field-deployment of the HOLOMAR system for in-situ subsea holography and analysis of marine plankton and nonliving particles.
Player, M.A. +56 more
core +1 more source