Changes in spatial extent and peak double optical density of human
... macular degeneration [7–9]. Macular pigment optical density (MPOD) has been demonstrated to increase after diets rich in zeaxanthin and lutein [10–16]. Measurements of MPOD as a function of age have been carried out using different techniques. Some studies using fundus reflectance spectroscopy found ...
... macular degeneration [7–9]. Macular pigment optical density (MPOD) has been demonstrated to increase after diets rich in zeaxanthin and lutein [10–16]. Measurements of MPOD as a function of age have been carried out using different techniques. Some studies using fundus reflectance spectroscopy found ...
Scanning Transmission Electron Microscopy
... still contribute to a small probe. Aberrated beams will not be focused at the correct probe position, and will lead to large diffuse illumination thereby destroying the spatial resolution. To prevent the higher angle aberrated beams from illuminating the sample, an objective aperture is used, and is ...
... still contribute to a small probe. Aberrated beams will not be focused at the correct probe position, and will lead to large diffuse illumination thereby destroying the spatial resolution. To prevent the higher angle aberrated beams from illuminating the sample, an objective aperture is used, and is ...
Template for Electronic Submission to ACS Journals
... passive optical devices.1 Such structures, also known as distributed Bragg reflectors, acquire their optical properties through the periodic modulation of the refractive index, so they are also classified as one-dimensional photonic crystals (1DPC). Many applications of these materials can be found ...
... passive optical devices.1 Such structures, also known as distributed Bragg reflectors, acquire their optical properties through the periodic modulation of the refractive index, so they are also classified as one-dimensional photonic crystals (1DPC). Many applications of these materials can be found ...
Coherent optical reflectance from a monolayer of large particles
... showed the potentiality of the internal-reflection experimental configuration as a sensitive tool to study the kinetics of the adsorption process, and to determine also the optical parameters of the adsorbed particles. The purpose of our work here is to perform these types of experiments and to deve ...
... showed the potentiality of the internal-reflection experimental configuration as a sensitive tool to study the kinetics of the adsorption process, and to determine also the optical parameters of the adsorbed particles. The purpose of our work here is to perform these types of experiments and to deve ...
Prediction of photothermal phase signatures from arbitrary
... Our heat model assumes that small solid particles with high surface to volume ratio, which are situated within a liquid medium, experience strong frictional forces causing them to quickly minimize their speed relative to the medium. This behavior is relevant for nanoparticles suspended in fluid, and ...
... Our heat model assumes that small solid particles with high surface to volume ratio, which are situated within a liquid medium, experience strong frictional forces causing them to quickly minimize their speed relative to the medium. This behavior is relevant for nanoparticles suspended in fluid, and ...
IOSR Journal of Computer Engineering (IOSR-JCE) e-ISSN: 2278-0661,p-ISSN: 2278-8727 PP 06-11 www.iosrjournals.org
... have allowed the realization and demonstration of the devices at shorter wavelengths with powerful area coverage [2]. However, before antennas could reach optical frequencies is a reliable and practical way of use of semiconductor detectors made possible. These optical networks use the available det ...
... have allowed the realization and demonstration of the devices at shorter wavelengths with powerful area coverage [2]. However, before antennas could reach optical frequencies is a reliable and practical way of use of semiconductor detectors made possible. These optical networks use the available det ...
5 The Basics of Confocal Microscopy
... Current instruments are highly modified from the earliest versions, but the principle of confocal imaging that was developed by Marvin Minsky is employed in all modern confocal microscopes (Minsky 1961; 1988). The image in a confocal microscope is achieved by scanning one or more focused beams of li ...
... Current instruments are highly modified from the earliest versions, but the principle of confocal imaging that was developed by Marvin Minsky is employed in all modern confocal microscopes (Minsky 1961; 1988). The image in a confocal microscope is achieved by scanning one or more focused beams of li ...
Laser Collimation of a Chromium Beam Using Doppler Force Wen
... typically uses a series of cylindrical atomic lenses formed by an optical standing wave (SW) to focus or manipulate atoms and deposit an atomic beam onto a substrate [1]. The collimation of the atomic beams plays an important role in atom lithography technology for two main reasons: the structure wi ...
... typically uses a series of cylindrical atomic lenses formed by an optical standing wave (SW) to focus or manipulate atoms and deposit an atomic beam onto a substrate [1]. The collimation of the atomic beams plays an important role in atom lithography technology for two main reasons: the structure wi ...
Needle-based reflection refractometry of scattering samples using
... 16 Apr 2007 / Vol. 15, No. 8 / OPTICS EXPRESS 4787 ...
... 16 Apr 2007 / Vol. 15, No. 8 / OPTICS EXPRESS 4787 ...
Reduction of ocular chromatic aberration by a blue light filtering
... 1. Thibos LN, Bradley A, Zhang XX. Effect of ocular chromatic aberration on monocular visual performance. Optom Vis Sci. 1991;68:599-607. 2. Rieger G. Improvement of contrast sensitivity with yellow filter glasses. Can J Ophthalmol. 1992;27:137-138. 3. Manzanera S, Piers P, Weeber H, Artal P. Visual ...
... 1. Thibos LN, Bradley A, Zhang XX. Effect of ocular chromatic aberration on monocular visual performance. Optom Vis Sci. 1991;68:599-607. 2. Rieger G. Improvement of contrast sensitivity with yellow filter glasses. Can J Ophthalmol. 1992;27:137-138. 3. Manzanera S, Piers P, Weeber H, Artal P. Visual ...
FILTERS AND BEAM SPLITTERS Several of the applications of
... Wavelength-selective Filters (Color Filters) The most complete description of the optical behavior of a filter is given by its spectrophotometric curve (also called transmittance): that is, a plot of wavelength versus transmittance. An example of a family of rather idealized spectrophotometric curve ...
... Wavelength-selective Filters (Color Filters) The most complete description of the optical behavior of a filter is given by its spectrophotometric curve (also called transmittance): that is, a plot of wavelength versus transmittance. An example of a family of rather idealized spectrophotometric curve ...
Noiseless, kilohertz-frame-rate, imaging detector based on micro
... of a standard size tube and window. The interior of a standard night vision type vacuum tube is only marginally larger than the Medipix2 device, making space constraints inside the vacuum tube very restrictive. Also the sensitivity of the photocathode to contamination means that everything that goes ...
... of a standard size tube and window. The interior of a standard night vision type vacuum tube is only marginally larger than the Medipix2 device, making space constraints inside the vacuum tube very restrictive. Also the sensitivity of the photocathode to contamination means that everything that goes ...
(FT-IR) Microspectroscopic Measurements of Intact Spheres
... changed, demonstrating the dramatic effect of using different lenses. While a complete discussion of the optical system and its effects on the recorded data from spheres is not presented here, the developed theory can be used for such modeling. Figure 3 is an important result both from a practical s ...
... changed, demonstrating the dramatic effect of using different lenses. While a complete discussion of the optical system and its effects on the recorded data from spheres is not presented here, the developed theory can be used for such modeling. Figure 3 is an important result both from a practical s ...
Metal surface structuring with spatiotemporally focused femtosecond
... The results given above show that the STF scheme can help improve the quality for metal surface structuring particularly under high peak laser intensities, a condition frequently required for highthroughput surface structuring. One of the physical reasons behind this is shown in Fig. 2. One can real ...
... The results given above show that the STF scheme can help improve the quality for metal surface structuring particularly under high peak laser intensities, a condition frequently required for highthroughput surface structuring. One of the physical reasons behind this is shown in Fig. 2. One can real ...
Light amplificated by stimulated emission of radiation
... There are a variety of very different gain media; the most common of them are: Certain direct-bandgap semiconductors such as GaAs, AlGaAs(aluminium Galium arsenide), or InGaAs(aluminium Galium arsenide), are typically pumped with electrical currents, these lasers are often in the form of quantum wel ...
... There are a variety of very different gain media; the most common of them are: Certain direct-bandgap semiconductors such as GaAs, AlGaAs(aluminium Galium arsenide), or InGaAs(aluminium Galium arsenide), are typically pumped with electrical currents, these lasers are often in the form of quantum wel ...
Optical and acoustic beam shaping for imaging and
... There are numerous people I would like to acknowledge throughout my graduate study. It has been a great pleasure and honour to work with all of them. First, I would like to thank my supervisor, Mike MacDonald. From my first visit to Institute of Medical Science and Technology (IMSaT) in September 20 ...
... There are numerous people I would like to acknowledge throughout my graduate study. It has been a great pleasure and honour to work with all of them. First, I would like to thank my supervisor, Mike MacDonald. From my first visit to Institute of Medical Science and Technology (IMSaT) in September 20 ...
Polarization Optics Tutorial: Polarizers, Waveplates, Rotators, and
... Retardation equals birefringence times thickness. Birefringence (no – ne) varies with temperature and wavelength. The thickness of a true zero order quartz waveplate with 0.25 waves retardance anywhere in the visible spectrum (0.4 to 0.7 µm wavelength) is between 10 and 20 µm. Such a part is difficu ...
... Retardation equals birefringence times thickness. Birefringence (no – ne) varies with temperature and wavelength. The thickness of a true zero order quartz waveplate with 0.25 waves retardance anywhere in the visible spectrum (0.4 to 0.7 µm wavelength) is between 10 and 20 µm. Such a part is difficu ...
Modulation instability for a relaxational Kerr medium Xue Liu , S.M. Shahriar
... domain. MI was first studied with coherent light beam in one dimensional self-focusing medium [8]. Later research shows that MI is also found in incoherent beams [9]. Recent studies show that spatial MI can exist in both self-focusing and self-defocusing medium if the nonlinearity is non-instantaneou ...
... domain. MI was first studied with coherent light beam in one dimensional self-focusing medium [8]. Later research shows that MI is also found in incoherent beams [9]. Recent studies show that spatial MI can exist in both self-focusing and self-defocusing medium if the nonlinearity is non-instantaneou ...
Diode pumped distributed Bragg reflector lasers
... centered in the planar polymer film and the emitted photons can form a standing wave due to the reflection from the gratings. If a 2nd order grating is used, the amplified light will be both reflected in the plane of the guide and scattered from the surface, thus forming a compact, surface-emitting ...
... centered in the planar polymer film and the emitted photons can form a standing wave due to the reflection from the gratings. If a 2nd order grating is used, the amplified light will be both reflected in the plane of the guide and scattered from the surface, thus forming a compact, surface-emitting ...
Wave on a String
... Lasers So what do you need to build a laser? 1. Gain Medium - a material with atoms that have a metastable state and that can achieve population inversion 2. Excitation Source - a way to supply energy to excite the atoms ...
... Lasers So what do you need to build a laser? 1. Gain Medium - a material with atoms that have a metastable state and that can achieve population inversion 2. Excitation Source - a way to supply energy to excite the atoms ...