Results 241 to 250 of about 2,557,405 (292)

Diffusers in digital holography

Journal of the Optical Society of America A, 1991
In Fourier and Fresnel holography diffuse illumination is used to smooth the power spectrum of the object wave. A speckle pattern will then disturb the diffraction pattern. We present methods to calculate appropriate diffusers in digital holography that do not introduce speckle.
Frank Wyrowski, Olof Bryngdahl, Ralf Bräuer   +2 more
openaire   +2 more sources

Single-shot phase-shifting incoherent digital holography with multiplexed checkerboard phase gratings.

Optics Letters, 2018
Single-shot phase-shifting incoherent digital holography with multiplexed checkerboard phase gratings is proposed for acquiring holograms of moving objects.
Teruyoshi Nobukawa, Tetsuhiko Muroi, Yutaro Katano, N. Kinoshita, Norihiko Ishii   +4 more
semanticscholar   +1 more source

Multiwavelength Digital Holography

2015
Another application of HI is the generation of a fringe pattern corresponding to contours of constant elevation with respect to a reference plane (see Fig. 7.1). Such contour fringes can be used to determine the shape of a 3D object. Holographic contour interferograms can be generated by the two-illumination-point method (discussed in Section 5.2 ...
Logan Williams, Rola Aylo, Georges Nehmetallah   +2 more
openaire   +2 more sources

Time-averaged digital holography

Optics Letters, 2003
We demonstrate that it is possible to study the modal structures of a vibrating object with digitally recorded holograms by use of the time-averaging principle. We investigate the numerical reconstruction from a theoretical point of view, and we show that the numerically reconstructed object from a digital hologram is modulated by the zeroth-order ...
Denis Mounier, Samuel Gougeon, Pascal Picart, Julien Leval   +3 more
openaire   +3 more sources

Imaging through distributed-volume aberrations using single-shot digital holography.

Journal of The Optical Society of America A-optics Image Science and Vision, 2019
This paper explores the use of single-shot digital holography data and a novel algorithm, referred to as multiplane iterative reconstruction (MIR), for imaging through distributed-volume aberrations. Such aberrations result in a linear, shift-varying or "
Casey J. Pellizzari, M. Spencer, C. Bouman   +2 more
semanticscholar   +1 more source

Roadmap of incoherent digital holography

Applied physics B, 2022
T. Tahara, Yaping Zhang, Joseph Rosen, V. Anand, Liangcai Cao, Jiachen Wu, T. Koujin, A. Matsuda, A. Ishii, Y. Kozawa, Ryo Okamoto, R. Oi, Teruyoshi Nobukawa, Kihong Choi, Masatoshi Imbe, T. Poon   +15 more
semanticscholar   +1 more source

Deep-turbulence wavefront sensing using digital holography in the on-axis phase shifting recording geometry with comparisons to the self-referencing interferometer.

Applied Optics, 2019
In this paper, we study the use of digital holography in the on-axis phase-shifting recording geometry for the purposes of deep-turbulence wavefront sensing.
Douglas E. Thornton, M. Spencer, G. Perram   +2 more
semanticscholar   +1 more source

Digital in-line holography of microspheres

Applied Optics, 2002
We have used digital in-line holography (DIH) with numerical reconstruction to image micrometer-sized latex spheres as well as ferrimagnetic beads suspended in gelatin. We have examined in detail theoretically and experimentally the conditions necessary to achieve submicrometer resolution of holographic reconstructions.
Manfred H. Jericho, Ian A. Meinertzhagen, W. Xu, Hans Jürgen Kreuzer   +3 more
openaire   +3 more sources

Coherence requirement in digital holography

Applied Optics, 2012
In this paper the coherence requirement for different holographic setups (Fresnel hologram, Fourier hologram, and image-plane hologram) is compared. This analysis is based on the investigation of the recorded interference pattern from the superposition of reference wave and object wave in in-line and off-axis mode. The outcome of this investigation can
John M. Rodenburg, Daciana Iliescu, Daniel Claus   +2 more
openaire   +3 more sources

High Resolution Non-Line-of-Sight Imaging with Superheterodyne Remote Digital Holography

Imaging and Applied Optics 2019 (COSI, IS, MATH, pcAOP), 2019
We present a novel technique for Non-Line-of-Sight imaging that borrows ideas from Multi-Wavelength Interferometry and Remote Digital Holography. Our method reaches a resolution of a few mm, which by far surpasses the resolution of conventional methods.
F. Willomitzer, Fengqiang Li, M. M. Balaji, Prasanna V. Rangarajan, O. Cossairt   +4 more
semanticscholar   +1 more source