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View/Open - Dora.dmu.ac.uk
View/Open - Dora.dmu.ac.uk

... Holography is a branch of optics and it is mostly unknown to a lay man as it contains complicated scientific terms in its definition such as diffraction and interference. The main focus of this paper is to briefly explain these terms using analogies and discuss the construction details of the CυBE. ...
Deep Horizontal Atmospheric Turbulence Modeling and Simulation with a Liquid
Deep Horizontal Atmospheric Turbulence Modeling and Simulation with a Liquid

... *Corresponding author: [email protected] Abstract We investigate the performance of a Liquid Crystal (LC) Spatial Light Modulator (SLM) as an optical device for generating high intensity atmospheric turbulence in the laboratory. The experimental setup represents long range horizontal beam propagation ...
Lecture 27 timed ppt
Lecture 27 timed ppt

... Note: The dimers form as a sort of slipped sandwich held together by one of two propionic acid groups (left or right) of the lower heme (both of which project toward the viewer) binding to the Fe atom in the center of the upper heme. At the same time one of the two acids (right or left) of the upper ...
summary
summary

... light transmitted through them was observed using an optical microscope. ...
CRYSTALLINITY
CRYSTALLINITY

... Substances possessing the cubic lattice arrangement were tabletted more satisfactorily than those with rhombohedral lattice. The isotropic nature of former group contribute to better tabletting because no alignment of particular lattice planes is required. In addition provide three equal planes for ...
Raman Spectra of Optically Trapped Microcomplexes
Raman Spectra of Optically Trapped Microcomplexes

... (a) Near-infrared Raman spectra of single live yeast cells (curve A) and dead yeast cells (curve B) in a batch culture. The acquisition time was 20s with a laser power of ~17mw at 785 nm. Tyr, tyrosine; phe, phenylalanine; def, deformed. (b) Image of the sorted yeast cells in the collection chamber. ...
1 Introduction 2 Theory of Optical Trapping
1 Introduction 2 Theory of Optical Trapping

... to consult the references and sources cited in this manual. Some of these are available in printed form at the practical. This setup is rather new, and is still being developed and improved. Therefore, not all experiments described in this manual will be completely available. Please report any malfu ...
Molecular beam epitaxy of periodic BaF2 /PbEuSe layers on Si„111…
Molecular beam epitaxy of periodic BaF2 /PbEuSe layers on Si„111…

... have similar lattice constants and thermal expansion coefficients, they are lattice and thermal mismatched with Si. For example, at room temperature the lattice mismatch between Si and BaF2 is about 14.2%, while the thermal expansion coefficient of Si is about seven times lower than that of BaF2. Ho ...
High-resolution measurement of phase singularities
High-resolution measurement of phase singularities

... laser mode can be seen, with an intensity zero in the center of the beam. The measured corresponding phase distribution is shown in Fig. 2(b). In all the figures, which show a phase distribution, black corresponds to a phase value of p and white to p. A difference in the radius of curvature between th ...
B. Gaussian Beam Transformation by a Lens.
B. Gaussian Beam Transformation by a Lens.

... source (usually the output of a spatial filter). This will give an output beam that is almost collimated. 2. Insert the optical flat, at an angle, in the output beam path and place a white card to view the interference pattern. The angle should be chosen such that a complete interference pattern can ...
Magneto-Optic Kerr Effect
Magneto-Optic Kerr Effect

... reflected light has been altered. Specifically, an ellipticity k has been introduced and the plane of polarization (major axis of the ellipse) has been rotated by an angle k. Both k and k are typically very small numbers, therefore small angle approximations will be used in this analysis. The li ...
GEOLOGY PPT
GEOLOGY PPT

... geometrically equivalent and whose spatial positions are related to one another by a specified set of symmetry operations. ◦ A simple crystal may consist of only a single crystal form. A more complicated crystal may be a combination of several different forms. ...
Interferometer design for writing Bragg gratings in optical fibers
Interferometer design for writing Bragg gratings in optical fibers

... the target or the phase mask angle about the y axis to bring these two components into optical alignment. This alignment is important for maintaining proper focus over the entire length of the target. The remaining positions and angles of the components can initially aligned “at the factory”, so to ...
Introduction to Acousto Optics
Introduction to Acousto Optics

... and/or recalibration. However, the selected wavelength is still a function of a precise geometrical arrangement between the grating and detector. Vibration or mishandling can thus cause "blurring" of the image on the array, which translates into reduced performance. Another limitation of this type o ...
Exp7. Birefringence in Calcite Crystals
Exp7. Birefringence in Calcite Crystals

... refraction at all parts in the crystal. However, for the light propagating in calcite crystal the refractive index can be different depending on the electric field orientation. The calcite crystal is the crystal formation of carbon, oxygen, and calcium atoms. Due to the variance in bonding strength ...
spatial filtering
spatial filtering

... where “f” is the focal length of the “Fourier transform” lens. The magnification (the ratio of the size of the final image to the original) will be i/o, and you will get an image of equal size to the original when o=I=2f. Of course, you will need to have the distance between the aperture and the “F ...
Advanced Microscopy
Advanced Microscopy

... incident photon flux stimulates emission at frequency of incident light if molecule is in the excited state (and if it can emit/absorb at this frequency) ...
Electromagnetic forces for an arbitrary optical trapping of a spherical
Electromagnetic forces for an arbitrary optical trapping of a spherical

... missing mechanical measurements in the world of microorganisms and cells that could be correlated to biochemical information. The importance of understanding the optical forces in dielectric beads under different incident beam conditions comes from the fact that they are the natural transducer for f ...
Imaging scanning tunneling microscope
Imaging scanning tunneling microscope

... The prospect of creating photonic devices based on surface plasmon propagation is attracting increasing attention.1–5 The motivation has been to create miniaturized optics that would enable higher bandwidth optical computing, all-optical interconnects for telecommunications, or even ‘‘nano-lasers.’’ ...
Second-harmonic generation of focused ultrashort
Second-harmonic generation of focused ultrashort

... show below, in many practical cases it is possible to find a simple closed-form solution for the discussed problem. Wang and Weiner [15] developed a theoretical framework for calculating the efficiency of Type I SHG by tightly focused and ultrashort pulses with simultaneous spatial and temporal walk ...
Supplement
Supplement

... reflections of the probe beam from the walls of the glass cell and from optical elements in the imaging system can interfere with the probe beam itself, leading to spatial fluctuations in its intensity profile. To reduce interference fringes and ensure uniform illumination, the central area of the prob ...
Rapid fabrication of 3D terahertz split ring resonator arrays by novel
Rapid fabrication of 3D terahertz split ring resonator arrays by novel

... performed in a 20 µm square cell with scattering boundary conditions. 9.5 µm of air above 5 µm of resist placed on 5.5 µm of glass are used as the sample. Laser illumination is simulated using the analytical Gaussian equation with polarization of the electric field perpendicular to the cell. 3D reso ...
Heidelberg Retina Tomograph - HRT
Heidelberg Retina Tomograph - HRT

... right hand side show the variations of the measured surface height along the horizontal lines superimposed on the topography images. The normal eye shows a regular shape of the cross section through the cup with a low slope on the temporal side and a higher slope nasally. The cross section through t ...
Optical Measurements of Pollution Dispersion at
Optical Measurements of Pollution Dispersion at

... or to visible wavelengths since the SNR would be worse, while the eye safety limits would be several orders of magnitude lower. We should note that for the incoherent system represented by RASCAL, only the first of the above terms is relevant. For simple backscatter, shorter wavelengths are better. ...
9.2. Summary - Stanford Synchrotron Radiation Lightsource
9.2. Summary - Stanford Synchrotron Radiation Lightsource

... (and are discussed later): ...
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Diffraction topography

Diffraction topography (short: ""topography"") is an quantum beam imaging technique based on Bragg diffraction.Diffraction topographic images (""topographies"") record the intensity profile of a beam of X-rays (or, sometimes, neutrons) diffracted by a crystal.A topography thus represents a two-dimensional spatial intensity mapping of reflected X-rays, i.e. the spatial fine structure of a Laue reflection.This intensity mapping reflects the distribution of scattering power inside the crystal; topographs therefore reveal the irregularities in a non-ideal crystal lattice.X-ray diffraction topography is one variant of X-ray imaging, making use of diffraction contrast rather than absorption contrast which is usually used in radiography and computed tomography (CT). Topography is exploited to a lesser extends with neutrons and other quantum beams. In the electron microscope community, such technique is called dark field imaging or diffraction contrast imaging.Topography is used for monitoring crystal quality and visualizing defects in many different crystalline materials.It has proved helpful e.g. when developing new crystal growth methods, for monitoring growth and the crystal quality achieved, and for iteratively optimizing growth conditions.In many cases, topography can be applied without preparing or otherwise damaging the sample; it is therefore one variant of non-destructive testing.
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