نتایج جستجو برای: holography

تعداد نتایج: 9186  

2017
Andrew Bañas Jesper Glückstad

Light shaping techniques based on phase-only modulation o er multiple advantages over amplitude modulation. This review examines and compares the merits of two phase modulation techniques; phase-only computer generated holography and Generalized Phase Contrast (GPC). Both techniques are brie y presented while recent developments in GPC will also be covered. Furthermore, novel hybrid schemes tha...

Journal: :Optics express 2017
Zihao Wang Leonidas Spinoulas Kuan He Huaijin G. Chen Lei Tian Aggelos K. Katsaggelos Oliver Cossairt

Compressed sensing has been discussed separately in spatial and temporal domains. Compressive holography has been introduced as a method that allows 3D tomographic reconstruction at different depths from a single 2D image. Coded exposure is a temporal compressed sensing method for high speed video acquisition. In this work, we combine compressive holography and coded exposure techniques and ext...

Journal: :Optics express 2013
Tomáš Slabý Pavel Kolman Zbyněk Dostál Martin Antoš Martin Lošťák Radim Chmelík

Coherence-controlled holographic microscope (CCHM) combines off-axis holography and an achromatic grating interferometer allowing for the use of light sources of arbitrary degree of temporal and spatial coherence. This results in coherence gating and strong suppression of coherent noise and parasitic interferences enabling CCHM to reach high phase measurement accuracy and imaging quality. The a...

2013
M. J. Yzuel

In the Physics degree in Spain the students have a mandatory course in Fundamentals of Optics as well as an Optics Laboratory course. With these two courses the students receive a general background of optics. There are also some optional courses on Optics in the last years of the degree. One of them is a course on Optical Image Processing and Holography. This course has 60 hours (equivalent to...

2017
Zengji Yue Gaolei Xue Juan Liu Yongtian Wang Min Gu

Holography has extremely extensive applications in conventional optical instruments spanning optical microscopy and imaging, three-dimensional displays and metrology. To integrate holography with modern low-dimensional electronic devices, holograms need to be thinned to a nanometric scale. However, to keep a pronounced phase shift modulation, the thickness of holograms has been generally limite...

2016
Weimin Ye Franziska Zeuner Xin Li Bernhard Reineke Shan He Cheng-Wei Qiu Juan Liu Yongtian Wang Shuang Zhang Thomas Zentgraf

Metasurfaces, as the ultrathin version of metamaterials, have caught growing attention due to their superior capability in controlling the phase, amplitude and polarization states of light. Among various types of metasurfaces, geometric metasurface that encodes a geometric or Pancharatnam-Berry phase into the orientation angle of the constituent meta-atoms has shown great potential in controlli...

2014
David Cooper Jean-Luc Rouvière Rafal Dunin-Borkowski

Off-axis electron holography is an electron microscopy-based technique that allows the electrostatic and magnetic fields in and around a specimen to be measured with nm-scale resolution. The continuous reduction in the size of semiconductor devices means that information about the distribution of strain fields and active dopants at a nanometre scale is required in order to understand how these ...

Journal: :Science 2002
Randy A Bartels Ariel Paul Hans Green Henry C Kapteyn Margaret M Murnane Sterling Backus Ivan P Christov Yanwei Liu David Attwood Chris Jacobsen

We present spatial coherence measurements of extreme ultraviolet (EUV) light generated through the process of high-harmonic up-conversion of a femtosecond laser. With a phase-matched hollow-fiber geometry, the generated beam was found to exhibit essentially full spatial coherence. The coherence of this laser-like EUV source was shown by recording Gabor holograms of small objects. This work demo...

2014
C. Ozsoy-Keskinbora C. B. Boothroyd R. E. Dunin-Borkowski P. A. van Aken C. T. Koch

Holography--originally developed for correcting spherical aberration in transmission electron microscopes--is now used in a wide range of disciplines that involve the propagation of waves, including light optics, electron microscopy, acoustics and seismology. In electron microscopy, the two primary modes of holography are Gabor's original in-line setup and an off-axis approach that was develope...

2004
Nils H. Abramson

The holo-diagram is a diagram originally designed as a tool for teaching the making and evaluation of holograms. It was soon found to include much more general uses than first expected. During the 20 years since its introduction we have applied this diagram to explain many different fields such as holography, interferometry, diffraction. Fermat's principle, light-in-flight recordings, threedime...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید