Guiding light with conformal transformations
... methods described here. All of the following discussion assumes that waveguide bends are bounded by PEC sidewalls. Figure 2(a) shows the spatially varying relative permittivity ε/εr for a circular beam or waveguide bend, determined computationally by the conformal module of Eq. (1) and specified by ...
... methods described here. All of the following discussion assumes that waveguide bends are bounded by PEC sidewalls. Figure 2(a) shows the spatially varying relative permittivity ε/εr for a circular beam or waveguide bend, determined computationally by the conformal module of Eq. (1) and specified by ...
Variable Focus Video: Reconstructing Depth and Video
... In the first iteration, the depth and the texture maps are unavailable. Hence, flow estimation can be approached by first computing a coarse optical flow and then refining via reblurring during the subsequent iterations. Initial Flow: Several approaches to compute the coarse initial flow can be adop ...
... In the first iteration, the depth and the texture maps are unavailable. Hence, flow estimation can be approached by first computing a coarse optical flow and then refining via reblurring during the subsequent iterations. Initial Flow: Several approaches to compute the coarse initial flow can be adop ...
OPTI 511R, Spring 2015 Problem Set 8 Prof. E. M. Wright Due
... (Remember that the Hermite-Gaussian solutions are valid for free space as well as within a cavity.) Thus the beam will have a waist w0 that is the same as the waist of the occupied cavity mode, and that is located in the same position in space (at z = 0) as the cavity mode waist. The transverse prof ...
... (Remember that the Hermite-Gaussian solutions are valid for free space as well as within a cavity.) Thus the beam will have a waist w0 that is the same as the waist of the occupied cavity mode, and that is located in the same position in space (at z = 0) as the cavity mode waist. The transverse prof ...
Get PDF - OSA Publishing
... [20,21]. Figure 3(c) shows an example of a measured concave mirror surface which is integrated with gradient data in Fig. 3(a) and (b). 3. Method of dynamic 3D sensing for specular reflective surface For measuring dynamic specular scenes, one of the major problems is how to calculate the pattern poi ...
... [20,21]. Figure 3(c) shows an example of a measured concave mirror surface which is integrated with gradient data in Fig. 3(a) and (b). 3. Method of dynamic 3D sensing for specular reflective surface For measuring dynamic specular scenes, one of the major problems is how to calculate the pattern poi ...
... The study of photopolymer materials based in polyvinyl alcohol/acrylamide (PVA/AA) has spurred a great deal of interest because their many attractive features to be used as holographic memories [1,2]. The technology of holographic information storage have great possibilities: a maximum theoretical s ...
Optical Phonon Interacting with Electrons in Carbon Nanotubes
... metallic nanotubes a narrow gap can open due to effects of a finite curvature2,14,19,20) and possible lattice strain.14,18,19,21−24) This gap can be controlled by a magnetic flux passing through the cross section due to the Aharonov-Bohm effect.14,25,26) Recently, splitting of optical absorption and em ...
... metallic nanotubes a narrow gap can open due to effects of a finite curvature2,14,19,20) and possible lattice strain.14,18,19,21−24) This gap can be controlled by a magnetic flux passing through the cross section due to the Aharonov-Bohm effect.14,25,26) Recently, splitting of optical absorption and em ...
OW1: Experiment on Planar Waveguides
... Firstly, the polarization state of the incident light should be arranged to be vertical to launch TE modes, using one of the techniques above. Clean the bottom surface of the prism well. The quartz slide supporting the waveguide should then be clamped firmly into the prism coupling assembly as shown ...
... Firstly, the polarization state of the incident light should be arranged to be vertical to launch TE modes, using one of the techniques above. Clean the bottom surface of the prism well. The quartz slide supporting the waveguide should then be clamped firmly into the prism coupling assembly as shown ...
OW1: Experiment on Planar Waveguides
... Firstly, the polarization state of the incident light should be arranged to be vertical to launch TE modes, using one of the techniques above. Clean the bottom surface of the prism well. The quartz slide supporting the waveguide should then be clamped firmly into the prism coupling assembly as shown ...
... Firstly, the polarization state of the incident light should be arranged to be vertical to launch TE modes, using one of the techniques above. Clean the bottom surface of the prism well. The quartz slide supporting the waveguide should then be clamped firmly into the prism coupling assembly as shown ...
Wavelength Tunable Short Pulses Sources Based on
... chirp compensation in a standard single-mode fiber. Two possible configurations have been developed and optimized to obtain a picosecond pulse train. An additional stage of pulse compression was necessary to arrive to femtosecond pulses, and a nonlinear fiber was employed. An analysis of a complete ...
... chirp compensation in a standard single-mode fiber. Two possible configurations have been developed and optimized to obtain a picosecond pulse train. An additional stage of pulse compression was necessary to arrive to femtosecond pulses, and a nonlinear fiber was employed. An analysis of a complete ...
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS (G02F takes
... array, e.g. frequency selective surfaces (for use with wavelengths longer than the infra-red light H01Q 15/0006)} Definition statement This place covers: Filters in which the spectral filtering is performed by a conductive grid or mesh. The background is that for microwave optics, there has long exi ...
... array, e.g. frequency selective surfaces (for use with wavelengths longer than the infra-red light H01Q 15/0006)} Definition statement This place covers: Filters in which the spectral filtering is performed by a conductive grid or mesh. The background is that for microwave optics, there has long exi ...
Rapid BRDF Measurement Using an Ellipsoidal
... The most significant characteristic of the system is that the ellipsoidal mirror is combined with a projector. By placing the projector at the focal point of the ellipsoidal mirror, the projector serves as a substitute for the light source. That is, the projection of a pattern in which only one pixel ...
... The most significant characteristic of the system is that the ellipsoidal mirror is combined with a projector. By placing the projector at the focal point of the ellipsoidal mirror, the projector serves as a substitute for the light source. That is, the projection of a pattern in which only one pixel ...
Librons Observed in Liquid Acetonitrile by Hyper-Rayleigh Scattering V 84, N 6
... Hyper-Rayleigh scattering (HRS) has recently become one of the principal methods for measuring the nonlinear optical properties of molecules in solution [1]. In this method the intensity of frequency-doubled light scattered from a liquid sample is measured, and the magnitude of the molecular first h ...
... Hyper-Rayleigh scattering (HRS) has recently become one of the principal methods for measuring the nonlinear optical properties of molecules in solution [1]. In this method the intensity of frequency-doubled light scattered from a liquid sample is measured, and the magnitude of the molecular first h ...
Paper - University of Queensland
... image-forming eyes have evolved independently over 50 times [1]. The purpose of all eyes is to convert light into some sort of neural signaling interpreted by the brain. Photosensitive cells within the eye act as photoreceptors, triggering a chain of action potentials when they sense light. In some ...
... image-forming eyes have evolved independently over 50 times [1]. The purpose of all eyes is to convert light into some sort of neural signaling interpreted by the brain. Photosensitive cells within the eye act as photoreceptors, triggering a chain of action potentials when they sense light. In some ...
Conference title, upper and lower case, bolded, 18 point type
... OCIS codes: (260.2110) Electromagnetic optics; (050.1960) Diffraction theory; (350.3950) Micro-optics. ...
... OCIS codes: (260.2110) Electromagnetic optics; (050.1960) Diffraction theory; (350.3950) Micro-optics. ...
Collimation Tester - Newport Corporation
... technique can be useful, but the Newport Collimation Tester offers the researcher a simpler approach. The Newport Collimation Tester 20QS20 makes use of a technique called “Shearing Interferometry.” This is a null method used to test the collimation of laser light whose coherence length is long comp ...
... technique can be useful, but the Newport Collimation Tester offers the researcher a simpler approach. The Newport Collimation Tester 20QS20 makes use of a technique called “Shearing Interferometry.” This is a null method used to test the collimation of laser light whose coherence length is long comp ...
Deconvolution Microscopy
... period of time at low light excitation levels, minimizing the disturbance of cell activity. The greatest limitation of optical microscopy is spatial resolution, which is in the range of the wavelength of light used. The ultimate goal of cell microscopy is to capture the activity of cell components. ...
... period of time at low light excitation levels, minimizing the disturbance of cell activity. The greatest limitation of optical microscopy is spatial resolution, which is in the range of the wavelength of light used. The ultimate goal of cell microscopy is to capture the activity of cell components. ...
Optical path function.
... Æ to focus a beam in a small spot (which is needed for achieving energy and/or spatial resolution) one must accept an increase in the beam divergence High beam divergence along the beamline: Æ large optical devices Æ high costs and low optical qualities With a not brilliant source the spot size can ...
... Æ to focus a beam in a small spot (which is needed for achieving energy and/or spatial resolution) one must accept an increase in the beam divergence High beam divergence along the beamline: Æ large optical devices Æ high costs and low optical qualities With a not brilliant source the spot size can ...
Ultrafast adaptive optical near-field control
... local, frequency-dependent dielectric function j共兲 for each homogeneous region j. Here we use the bulk 共兲 for gold and silver given from optical data.35 For the size of the nanostructures considered here, i.e., for particle sizes larger than 10 nm, the use of the bulk 共兲 is valid, since quant ...
... local, frequency-dependent dielectric function j共兲 for each homogeneous region j. Here we use the bulk 共兲 for gold and silver given from optical data.35 For the size of the nanostructures considered here, i.e., for particle sizes larger than 10 nm, the use of the bulk 共兲 is valid, since quant ...
Chapter 2.1 - Focusing Fundamentals
... waves will combine to form a central bright spot. There will be some slightly off-axis photons resulting from diffraction, however, and they will travel a slightly different path to the focal plane. These will meet on-axis photons and depending on the distance from the optical axis, they will cancel ...
... waves will combine to form a central bright spot. There will be some slightly off-axis photons resulting from diffraction, however, and they will travel a slightly different path to the focal plane. These will meet on-axis photons and depending on the distance from the optical axis, they will cancel ...
Specifying an Aspheric Surface
... or toric, form exists which has the effective shape of a doughnut with two radii. Applications and Benefits The majority of optical systems are based on the use of spherical components because they are easier to manufacture. However, there are cases where aspheric components have a significant advan ...
... or toric, form exists which has the effective shape of a doughnut with two radii. Applications and Benefits The majority of optical systems are based on the use of spherical components because they are easier to manufacture. However, there are cases where aspheric components have a significant advan ...
refraction systems autorefractors
... Now with VFI, EasyConnect, Guided Progression Analysis (GPA) and HFA-NET Pro standard. 19 test patterns; user-designed custom testing w/range to 90º; patented gaze-tracking system provides true reliability assessment without disrupting testing. Built-in 40 GB data storage; compares multiple STATPAC ...
... Now with VFI, EasyConnect, Guided Progression Analysis (GPA) and HFA-NET Pro standard. 19 test patterns; user-designed custom testing w/range to 90º; patented gaze-tracking system provides true reliability assessment without disrupting testing. Built-in 40 GB data storage; compares multiple STATPAC ...
Lecture 6: Waves Review and Examples PLEASE REVIEW ON
... Suppose that when we pass red light (λ = 600 nm) through a slit of unknown width a, the width of the spot (the distance between the first zeros on each side of the bright peak) is W = 1 cm on a screen that is L = 2 m behind the slit. How wide is the slit? ...
... Suppose that when we pass red light (λ = 600 nm) through a slit of unknown width a, the width of the spot (the distance between the first zeros on each side of the bright peak) is W = 1 cm on a screen that is L = 2 m behind the slit. How wide is the slit? ...
High-performance holographic technologies for fluid
... As in all natural processes, turbulent transport obeys laws of conservation of mass, momentum (angular momentum, if applicable) and energy (Landau & Lifshitz 1987a,b). In the description of canonical Kolmogorov-type turbulence, mass and momentum are conserved owing to conditions of homogeneity, isot ...
... As in all natural processes, turbulent transport obeys laws of conservation of mass, momentum (angular momentum, if applicable) and energy (Landau & Lifshitz 1987a,b). In the description of canonical Kolmogorov-type turbulence, mass and momentum are conserved owing to conditions of homogeneity, isot ...
Pavadinimas - National Tsing Hua University
... Spatial dependence of atom-light detuning Spatial dependence of both the laser amplitudes and also atom-light detuning (e.g. optical flux lattices) ...
... Spatial dependence of atom-light detuning Spatial dependence of both the laser amplitudes and also atom-light detuning (e.g. optical flux lattices) ...
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.