PHY 124 - National Open University of Nigeria
... In distance learning, the study units replace the lecturer. This is one of the great advantages of distance learning; you can read and work through specially designed study materials at your own pace, and at a time and place that suit you best. Think of it as reading the lecture instead of listening ...
... In distance learning, the study units replace the lecturer. This is one of the great advantages of distance learning; you can read and work through specially designed study materials at your own pace, and at a time and place that suit you best. Think of it as reading the lecture instead of listening ...
Wigner Distribution in Optics
... In 1932 Wigner1 introduced a distribution function in mechanics that permitted a description of mechanical phenomena in a phase space. Such a Wigner distribution was introduced in optics by Dolin2 and Walther3, 4 in the sixties, to relate partial coherence to radiometry. A few years later, the Wigne ...
... In 1932 Wigner1 introduced a distribution function in mechanics that permitted a description of mechanical phenomena in a phase space. Such a Wigner distribution was introduced in optics by Dolin2 and Walther3, 4 in the sixties, to relate partial coherence to radiometry. A few years later, the Wigne ...
PHY103 - National Open University of Nigeria
... In distance learning, the study units replace the lecturer. This is one of the great advantages of distance learning; you can read and work through specially designed study materials at your own pace, and at a time and place that suit you best. Think of it as reading the lecture instead of listening ...
... In distance learning, the study units replace the lecturer. This is one of the great advantages of distance learning; you can read and work through specially designed study materials at your own pace, and at a time and place that suit you best. Think of it as reading the lecture instead of listening ...
Microsphere optical device
... [0006] The high Q factor of microsphere optical devices results from loW optical loss in the material (typically, ?ber-grade fused silica), a ?re-polished surface With subna nometer-scale inhomogeneities, high-index contrast for steep reduction of radiative and scattering losses With increasing radi ...
... [0006] The high Q factor of microsphere optical devices results from loW optical loss in the material (typically, ?ber-grade fused silica), a ?re-polished surface With subna nometer-scale inhomogeneities, high-index contrast for steep reduction of radiative and scattering losses With increasing radi ...
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... understanding of my research projects with new insights. I also owe much gratitude to former people in the Rb lab: Dominik Schneble, Aaron Leanhardt, Erik Streed, Micah Boyd, and Gretchen Campbell. When I joined the Rb BEC lab, I worked with Erik and Dominik. Dominik, who was a then postdoc, helped ...
... understanding of my research projects with new insights. I also owe much gratitude to former people in the Rb lab: Dominik Schneble, Aaron Leanhardt, Erik Streed, Micah Boyd, and Gretchen Campbell. When I joined the Rb BEC lab, I worked with Erik and Dominik. Dominik, who was a then postdoc, helped ...
diffraction gratings
... A spectrometer is an apparatus designed to measure the distribution of radiation of a source in a particular wavelength region. Its principal components are a monochromator and a radiant power detector such as a photoemissive cell or a photomultiplier tube. Radiant power enters the entrance slit of ...
... A spectrometer is an apparatus designed to measure the distribution of radiation of a source in a particular wavelength region. Its principal components are a monochromator and a radiant power detector such as a photoemissive cell or a photomultiplier tube. Radiant power enters the entrance slit of ...
Optical aberrations of intraocular lenses measured in vivo and in vitro
... jects ranged from 5 to 6 mm (as opposed to young subjects, for whom we typically use 6.5 mm). The number of sample points in the pupil was 37 in all cases; therefore the step size ranged from 0.7 to 0.8 mm. To facilitate comparisons across subjects, all data are presented for a 5-mm pupil diameter. ...
... jects ranged from 5 to 6 mm (as opposed to young subjects, for whom we typically use 6.5 mm). The number of sample points in the pupil was 37 in all cases; therefore the step size ranged from 0.7 to 0.8 mm. To facilitate comparisons across subjects, all data are presented for a 5-mm pupil diameter. ...
Raman microscopy in an electron microscope: combining chemical
... The main idea of combination of a confocal Raman microscope (CRM) with a scanning electron microscope (SEM) is to get more information about the sample under research. Considering a SEM with all it detectors such as SE (secondary electron), BSE (back scattered electron), XRMA (X-ray micro-analyses) ...
... The main idea of combination of a confocal Raman microscope (CRM) with a scanning electron microscope (SEM) is to get more information about the sample under research. Considering a SEM with all it detectors such as SE (secondary electron), BSE (back scattered electron), XRMA (X-ray micro-analyses) ...
this PDF file
... occluded vein with varying degrees of capillary nonperfusion. Blocked fluorescence from intraretinal hemorrhages, dye extravasation in macular edema and later on, microaneurysms, telangiectatic collateral vessels or retinal neovascularization are the other angiographic features. In chronic cases, mi ...
... occluded vein with varying degrees of capillary nonperfusion. Blocked fluorescence from intraretinal hemorrhages, dye extravasation in macular edema and later on, microaneurysms, telangiectatic collateral vessels or retinal neovascularization are the other angiographic features. In chronic cases, mi ...
Novel Metrology Techniques Resolve Strong-Field
... Laser pulses can observe and control electronic properties of matter on the time scale of the optical field cycle [1]. In case the transient field strength reaches values just below the damage threshold of the material, the polarization response of the excited system depends on the field oscillation ...
... Laser pulses can observe and control electronic properties of matter on the time scale of the optical field cycle [1]. In case the transient field strength reaches values just below the damage threshold of the material, the polarization response of the excited system depends on the field oscillation ...
Color-changing and color-tunable photonic bandgap fiber textiles
... a yarn bundle has a major effect on the appearance of the resultant textile [26, 27, 28, 29, 30], including textile brightness, glitter, color, etc. The use of the synthetic fibers with non-circular crossections, or microstructured fibers containing air voids [31] running along their length became o ...
... a yarn bundle has a major effect on the appearance of the resultant textile [26, 27, 28, 29, 30], including textile brightness, glitter, color, etc. The use of the synthetic fibers with non-circular crossections, or microstructured fibers containing air voids [31] running along their length became o ...
Spectroscopy – I. Gratings and Prisms
... If we could see the whole spectrum (radio to γ–ray), then every order would completely overlap with every other order. In reality, of course, many effects limit what we can see/measure. For example, the atmosphere will eliminate most photons at shorter wavelengths than about 340nm – as well as large ...
... If we could see the whole spectrum (radio to γ–ray), then every order would completely overlap with every other order. In reality, of course, many effects limit what we can see/measure. For example, the atmosphere will eliminate most photons at shorter wavelengths than about 340nm – as well as large ...
Modal Analysis and Controls Laboratory
... polarization beam splitter. The interference pattern between the measurement and reference signals as the laser is swept across a wavelength range is recorded on two detectors, labeled S and P. A Fourier transform of these detected signals yields the amplitude and phase of the reflected light as a f ...
... polarization beam splitter. The interference pattern between the measurement and reference signals as the laser is swept across a wavelength range is recorded on two detectors, labeled S and P. A Fourier transform of these detected signals yields the amplitude and phase of the reflected light as a f ...
Finite-difference time-domain modeling of dispersive
... unanticipated regions. Moreover, the individual bandgaps widen as the dispersive effects become stronger. The metal/dielectric bandgap structures, despite the presence of metals with very shallow skin depths, can be designed to have strong transmissive properties that could be used for interesting f ...
... unanticipated regions. Moreover, the individual bandgaps widen as the dispersive effects become stronger. The metal/dielectric bandgap structures, despite the presence of metals with very shallow skin depths, can be designed to have strong transmissive properties that could be used for interesting f ...
Tuning Dynamic Range and Sensitivity of White
... To exploit the SP effect for analytical applications, two types of SPR sensors have been employed: constant-angle sensors and constant-wavelength sensors. Constant-angle SPR sensors employ the traditional “Kretschmann configuration” where a metal-coated BK7 glass prism is used for the sensing area. ...
... To exploit the SP effect for analytical applications, two types of SPR sensors have been employed: constant-angle sensors and constant-wavelength sensors. Constant-angle SPR sensors employ the traditional “Kretschmann configuration” where a metal-coated BK7 glass prism is used for the sensing area. ...
Experimental Verification of n = 0 Structures for Visible Light
... a metallic waveguide operating around its cutoff frequency behaves, under proper conditions, as a structure with an effective refractive index and effective permittivity near zero. This concept has been exploited to experimentally verify some of the ENZ properties, such as supercoupling, at microwav ...
... a metallic waveguide operating around its cutoff frequency behaves, under proper conditions, as a structure with an effective refractive index and effective permittivity near zero. This concept has been exploited to experimentally verify some of the ENZ properties, such as supercoupling, at microwav ...
PHOTONIC CRYSTALS WITH ACTIVE ORGANIC MATERIALS by
... Figure 1-2 Hyper Rayleigh scattering. Second harmonic light is generated in an isotropic solution........................................................................................................................ 25 ...
... Figure 1-2 Hyper Rayleigh scattering. Second harmonic light is generated in an isotropic solution........................................................................................................................ 25 ...
Method and apparatus for gas discharge laser output light
... nature of the problem impacting, e.g., the high speed mea surement of spectral energy integration values for high repetition rate pulsed narroW band gas discharge lasers utiliZing, e.g., fringe Width measurements at some selected Width at some selected percentage of the peak value, e.g., full Width ...
... nature of the problem impacting, e.g., the high speed mea surement of spectral energy integration values for high repetition rate pulsed narroW band gas discharge lasers utiliZing, e.g., fringe Width measurements at some selected Width at some selected percentage of the peak value, e.g., full Width ...
Factors associated with foveoschisis and foveal detachment
... Highly myopic eyes were defined as having a spherical equivalence (SE) of less than –6 D or an axial length (AXL) greater than 26.5 mm. Exclusion criteria included systemic diseases, previous ocular surgery within 6 months, and glaucoma due to thin retinal thinkness. The OCT-3 system used in this st ...
... Highly myopic eyes were defined as having a spherical equivalence (SE) of less than –6 D or an axial length (AXL) greater than 26.5 mm. Exclusion criteria included systemic diseases, previous ocular surgery within 6 months, and glaucoma due to thin retinal thinkness. The OCT-3 system used in this st ...
A Michelson interferometric technique for measuring refractive index
... solids, and determine small changes in length quite precisely. The instrument can be used as a stable mode selecting resonator element in laser cavities as well. Interferometry has been used for thickness and index measurements of thin films 3 ,4 and optical fibers 5. In principle, these measurement ...
... solids, and determine small changes in length quite precisely. The instrument can be used as a stable mode selecting resonator element in laser cavities as well. Interferometry has been used for thickness and index measurements of thin films 3 ,4 and optical fibers 5. In principle, these measurement ...
High efficiency high power blue laser by resonant doubling in PPKTP.
... sequencing, cell counting etc. or in semiconductor industry for use in detection of defects and crevices on silicon wafers with high contrast and resolution. Significance of the Work Retaining competitive advantages of its features such as high conversion efficiency, the combination of a pigtailed o ...
... sequencing, cell counting etc. or in semiconductor industry for use in detection of defects and crevices on silicon wafers with high contrast and resolution. Significance of the Work Retaining competitive advantages of its features such as high conversion efficiency, the combination of a pigtailed o ...
Sub-wavelength grating for enhanced ring resonator biosensor
... biosensing platform, Genalyte, utilizes ring resonators for TE polarized light and provides a bulk sensitivity of 54 nm/RIU and detection limit of 1 ng/mL, or 10−5 RIU [22, 23] (for simplicity quasi - TE and - TM modes are referred to as TE and TM modes). Yet many clinical diagnostic assays require ...
... biosensing platform, Genalyte, utilizes ring resonators for TE polarized light and provides a bulk sensitivity of 54 nm/RIU and detection limit of 1 ng/mL, or 10−5 RIU [22, 23] (for simplicity quasi - TE and - TM modes are referred to as TE and TM modes). Yet many clinical diagnostic assays require ...
Micro-Displacement Sensor Based on a Hollow
... high light/sample overlapping [1,2]. These advantages lead to fascinating applications based on HC-PCFs, such as gas sensing [3], rhodamine sensing [4], DNA sensing [5], particle guidance and levitation [6], among others. However, hollow-core PCFs present the disadvantage of supporting multiple mode ...
... high light/sample overlapping [1,2]. These advantages lead to fascinating applications based on HC-PCFs, such as gas sensing [3], rhodamine sensing [4], DNA sensing [5], particle guidance and levitation [6], among others. However, hollow-core PCFs present the disadvantage of supporting multiple mode ...
Optimizing Fraction Collection Triggered by the Agilent 1260 Infinity
... split the preparative flow on the Agilent preparative LC systems to trigger the collection with an ELSD. This Technical Overview shows how to optimize peak-based fraction collection triggered by an ELSD. We describe the system setup, the delay calibration between detector and fraction collector, and ...
... split the preparative flow on the Agilent preparative LC systems to trigger the collection with an ELSD. This Technical Overview shows how to optimize peak-based fraction collection triggered by an ELSD. We describe the system setup, the delay calibration between detector and fraction collector, and ...
Optical coherence tomography
Optical coherence tomography (OCT) is an established medical imaging technique that uses light to capture micrometer-resolution, three-dimensional images from within optical scattering media (e.g., biological tissue). Optical coherence tomography is based on low-coherence interferometry, typically employing near-infrared light. The use of relatively long wavelength light allows it to penetrate into the scattering medium. Confocal microscopy, another optical technique, typically penetrates less deeply into the sample but with higher resolution.Depending on the properties of the light source (superluminescent diodes, ultrashort pulsed lasers, and supercontinuum lasers have been employed), optical coherence tomography has achieved sub- micrometer resolution (with very wide-spectrum sources emitting over a ~100 nm wavelength range).Optical coherence tomography is one of a class of optical tomographic techniques. A relatively recent implementation of optical coherence tomography, frequency-domain optical coherence tomography, provides advantages in signal-to-noise ratio, permitting faster signal acquisition. Commercially available optical coherence tomography systems are employed in diverse applications, including art conservation and diagnostic medicine, notably in ophthalmology and optometry where it can be used to obtain detailed images from within the retina. Recently it has also begun to be used in interventional cardiology to help diagnose coronary artery disease. It has also shown promise in dermatology to improve the diagnostic process.