Results 201 to 210 of about 72,954 (249)

Digital in-line holographic microscopy

Applied Optics, 2006
We first briefly review the state of the art of digital in-line holographic microscopy (DIHM) with numerical reconstruction and then discuss some technical issues, such as lateral and depth resolution, depth of field, twin image, four-dimensional tracking, and reconstruction algorithm.
H. Jürgen Kreuzer, P. Klages, Manfred H. Jericho, Jorge Garcia-Sucerquia, W. Xu, Stephan K. Jericho   +5 more
openaire   +2 more sources

Holographic point source for digital lensless holographic microscopy

Optics Letters, 2022
A holographic point source (HPS) developed for digital lensless holographic microscopy (HPS-DLHM) is presented. The HPS is an off-axis phase transmission hologram of an experimental micrometer pinhole recorded on a photopolymer holographic film. An amplitude division interferometer, adjusted to operate at maximum diffraction efficiency, has been ...
Maria J. Lopera, Carlos Trujillo
openaire   +2 more sources

Optical Tomography by Digital Holographic Microscopy

Novel Optical Instrumentation for Biomedical Applications IV, 2009
Optical tomography provides three-dimensional data of the measured specimen, while quantitative phase imaging enables measuring the induced phase-shifts. Combining those two technologies makes possible to get three-dimensional refractive index reconstruction.
Pavillon, Nicolas, Kühn, Jonas, Charrière, Florian, Depeursinge, Christian   +3 more
openaire   +3 more sources

Superesolution in digital holographic microscopy

2011 10th Euro-American Workshop on Information Optics, 2011
In this contribution, we address with the possibility to overcome the limited resolving power of imaging systems beyond the limit imposed by Abbe's diffraction theory. We first review the mathematical foundations underlying superresolution (SR) from an information theory point of view and then we focus on two multiplexing approaches in digital ...
Alejandro Calabuig, Javier Garcia, Carlos Ferreira, Vicente Micó, Zeev Zalevsky   +4 more
openaire   +2 more sources

Digital holographic microscopy applied to metrology

SPIE Proceedings, 2004
We report on a method called Digital Holographic Microscopy (DHM) for the numerical reconstruction of digital holograms taken with a microscope. It allows for simultaneous amplitude and quantitative phase contrast imaging. The reconstruction method computes the propagation of the complex optical wavefront diffracted by the object and is used to ...
Depeursinge, C. D., Charrière, F., Marian, A. M., Montfort, F., Colomb, T. B., Kühn, J., Cuche, E., Emery, Y., Marquet, P., Magistretti, P. J.   +9 more
openaire   +2 more sources

Autofocusing in digital holographic microscopy

3D Research, 2011
Many applications in non-destructive testing at a microscopic level and in live cell imaging require automated focusing due to unstable environmental conditions, moving specimen or the limited depth of field of the applied optical imaging systems.
Björn Kemper, Patrik Langehanenberg, Gert von Bally   +2 more
openaire   +2 more sources

Immersion digital in-line holographic microscopy

Optics Letters, 2006
Digital in-line holographic microscopy is a promising new tool for high resolution imaging. We demonstrate, by using latex beads, that a considerable increase in numerical aperture, and, therefore, resolution can be achieved if the space between a source and a CCD camera chip is filled with a high refractive index medium.
Jorge Garcia-Sucerquia, Hans Jürgen Kreuzer, Manfred H. Jericho, W. Xu   +3 more
openaire   +3 more sources

In-line digital holographic imaging in volume holographic microscopy

Optics Letters, 2015
A dual-plane in-line digital holographic imaging method incorporating volume holographic microscopy (VHM) is presented to reconstruct objects in a single shot while eliminating zero-order and twin-image diffracted waves. The proposed imaging method is configured such that information from different axial planes is acquired simultaneously using ...
Wei-Tang Lin, Yuan Luo, Xiaomin Zhai, Jui-Chang Tsai, Hsi-Hsun Chen, Po-Hao Wang, Vijay Raj Singh, Li-Hao Yeh   +7 more
openaire   +3 more sources

Polarization sensing in digital holographic microscopy [PDF]

2020 IEEE Aerospace Conference, 2020
Digital holographic microscopy is well suited to the search for microbial species due in part to its intrinsic stability, volumetric imaging capability, and sensitivity to very dilute samples. This is all done with a system having no moving parts, making it additionally attractive for flight instrumentation.
Alex Ramirez, Eugene Serabyn, Dylan Mckeithen, J. Kent Wallace   +3 more
openaire   +1 more source