optical flow using color information: preliminary
... Among the existing methods for Optical Flow estimation, gradient based techniques are distinguished. Such techniques are based on image brightness changes of each pixel with (x, y) coordinates. Considering that small displacements do not modifie brightness intensity of a image point, a Constraint Op ...
... Among the existing methods for Optical Flow estimation, gradient based techniques are distinguished. Such techniques are based on image brightness changes of each pixel with (x, y) coordinates. Considering that small displacements do not modifie brightness intensity of a image point, a Constraint Op ...
Controlling light-with-light without nonlinearity
... patterning, one can manipulate the balance among absorption, transmission and reflection in sub-wavelength plasmonic films to achieve desired levels at any visible/infrared wavelength. Figure 3c shows modulation of total output intensity resulting from modulation of control intensity in the time dom ...
... patterning, one can manipulate the balance among absorption, transmission and reflection in sub-wavelength plasmonic films to achieve desired levels at any visible/infrared wavelength. Figure 3c shows modulation of total output intensity resulting from modulation of control intensity in the time dom ...
Enhancement of absorption and color contrast in
... light into a multimode optical fiber (400 lm core), which was then sent to a grating spectrometer (Ocean Optics). The collection spot was 80 lm in diameter, which is much smaller than the spatial extent of our Ge thickness gradient, and therefore we assumed that the thickness change was negligible o ...
... light into a multimode optical fiber (400 lm core), which was then sent to a grating spectrometer (Ocean Optics). The collection spot was 80 lm in diameter, which is much smaller than the spatial extent of our Ge thickness gradient, and therefore we assumed that the thickness change was negligible o ...
Signal-to-Signal-to-Noise-Ratio of Full-Field Fourier
... Our optical source is launched into a fiber-optic coupler which splits the light into the sample and reference arms. A sample is located at the front focal plane of a Fourier lens, this is shown as a point like scatterer in Figure1. The scatterer is illuminated at an angle α, by a collimated beam fr ...
... Our optical source is launched into a fiber-optic coupler which splits the light into the sample and reference arms. A sample is located at the front focal plane of a Fourier lens, this is shown as a point like scatterer in Figure1. The scatterer is illuminated at an angle α, by a collimated beam fr ...
interferometer_2014
... beam splitter and mirrors and then blow the beam up for viewing at the end. We use a laser pointer because you get a surprisingly good and reliable light source for under $25. By keeping the distances between the end mirrors and the beam splitter nearly equal, we mitigate problems caused by multimod ...
... beam splitter and mirrors and then blow the beam up for viewing at the end. We use a laser pointer because you get a surprisingly good and reliable light source for under $25. By keeping the distances between the end mirrors and the beam splitter nearly equal, we mitigate problems caused by multimod ...
Refractive indexes of (Al,Ga,In)As epilayers on InP for optoelectronic
... We have minimized this error by performing the spectrophotometer background correction with a bare InP substrate (rather than a metal mirror). The fringe amplitude is the determined from a normalized reflectivity spectrum which oscillates around unity. The data of Pettit et al. [9] was used for the ...
... We have minimized this error by performing the spectrophotometer background correction with a bare InP substrate (rather than a metal mirror). The fringe amplitude is the determined from a normalized reflectivity spectrum which oscillates around unity. The data of Pettit et al. [9] was used for the ...
Highly transmissive luminescent down
... production of transparent layers with tunable absorption and emission bands [9, 10]. Such layers can be adjusted to specific photovoltaic devices and raise their overall efficiency. However, both material types share such disadvantages as high re-absorption, followed by luminescence efficiency drop ...
... production of transparent layers with tunable absorption and emission bands [9, 10]. Such layers can be adjusted to specific photovoltaic devices and raise their overall efficiency. However, both material types share such disadvantages as high re-absorption, followed by luminescence efficiency drop ...
ZnO/SiO2 microcavity modulator on silicon Abstract - Paul
... of a λ/2 cavity spacer (C) of thickness dc and refractive index nc inserted between two Bragg mirror (BM) stacks of dielectric and simultaneously, piezoelectric λ/4 layers. A surface acoustic wave (SAW) generated on the structure by an interdigitated transducer (IDT) creates an optical superlattice ...
... of a λ/2 cavity spacer (C) of thickness dc and refractive index nc inserted between two Bragg mirror (BM) stacks of dielectric and simultaneously, piezoelectric λ/4 layers. A surface acoustic wave (SAW) generated on the structure by an interdigitated transducer (IDT) creates an optical superlattice ...
Particles in a gas may be viewed as wavepackets with an extent of
... atoms slow down, and eventually the shifted frequency will be too far from the resonance frequency to allow excitation. There are various methods to compensate for this effect (Metcalf, van der Straten, 1999). The two most common ones are changing the laser’s frequency as cooling progresses (known a ...
... atoms slow down, and eventually the shifted frequency will be too far from the resonance frequency to allow excitation. There are various methods to compensate for this effect (Metcalf, van der Straten, 1999). The two most common ones are changing the laser’s frequency as cooling progresses (known a ...
2.7 Optical Fiber Attenuation
... ▪ caused in inhomogeneities which are comparable in size to the guided wavelength. ▪ These result from the non-perfect cylindrical structure of the waveguide and may be caused by fiber imperfections such as irregularities in the core-cladding interface, core-cladding refractive index differences alo ...
... ▪ caused in inhomogeneities which are comparable in size to the guided wavelength. ▪ These result from the non-perfect cylindrical structure of the waveguide and may be caused by fiber imperfections such as irregularities in the core-cladding interface, core-cladding refractive index differences alo ...
Numerical Analysis of Orbital Angular Momentum Based Next
... analogous to various other multiplexing technologies, such as wavelength-division multiplexing (WDM) [5], [6], optical time-division multiplexing (OTDM) [7], spatial-division multiplexing (SDM) using multicore fibers [8] and mode-division multiplexing (MDM) [9]. Orbital angular momentum has given ri ...
... analogous to various other multiplexing technologies, such as wavelength-division multiplexing (WDM) [5], [6], optical time-division multiplexing (OTDM) [7], spatial-division multiplexing (SDM) using multicore fibers [8] and mode-division multiplexing (MDM) [9]. Orbital angular momentum has given ri ...
Optical Properties of Lithium - Zinc – Boro- MolybdateGlass
... The importance of glass in optical applications cannot be over emphasized, particularly as a host for optically active ions. Several applications of optical processes are known, such as inter-ionic electronic transitions, inter-ionic transitions or excitations which takes place within the electronic ...
... The importance of glass in optical applications cannot be over emphasized, particularly as a host for optically active ions. Several applications of optical processes are known, such as inter-ionic electronic transitions, inter-ionic transitions or excitations which takes place within the electronic ...
AN EXPERIMENT RESEARCH ON EXTEND THE RANGE OF
... For this reason, the demodulation of coded wavelength is the core technology. The demodulation method can be divided into active and passive demodulation techniques according to the types of demodulation component. The former includes the interferometericbased wavelength tracking techniques [4, 5], ...
... For this reason, the demodulation of coded wavelength is the core technology. The demodulation method can be divided into active and passive demodulation techniques according to the types of demodulation component. The former includes the interferometericbased wavelength tracking techniques [4, 5], ...
244065
... θmin in Fig. 7. The results suggest that the intensity enhancement due to rays with large incident angles is less than the intensity enhancement from the rays with small incident angles. As we mentioned above, the results in Fig. 5 indicates that the intensity enhancement is almost preserved as α in ...
... θmin in Fig. 7. The results suggest that the intensity enhancement due to rays with large incident angles is less than the intensity enhancement from the rays with small incident angles. As we mentioned above, the results in Fig. 5 indicates that the intensity enhancement is almost preserved as α in ...
Optical Tweezers: Measuring Piconewton Forces
... Optical tweezers instruments use the forces of laser radiation pressure to trap small particles. Using various techniques, these trapped particles can then be manipulated and forces on the objects in the trap can be measured. The forces that such an instrument is capable of measuring are of the orde ...
... Optical tweezers instruments use the forces of laser radiation pressure to trap small particles. Using various techniques, these trapped particles can then be manipulated and forces on the objects in the trap can be measured. The forces that such an instrument is capable of measuring are of the orde ...
Tailoring repulsive optical forces in nanophotonic waveguides
... and U is the total energy of the electromagnetic fields [9]. By convention, negative and positive values correspond to attractive and repulsive forces, respectively. Rakich et al. [10] later showed that Eq. (1) is mathematically equivalent to the Maxwell stress tensor method but has the advantage th ...
... and U is the total energy of the electromagnetic fields [9]. By convention, negative and positive values correspond to attractive and repulsive forces, respectively. Rakich et al. [10] later showed that Eq. (1) is mathematically equivalent to the Maxwell stress tensor method but has the advantage th ...
Optical tweezers
Optical tweezers (originally called ""single-beam gradient force trap"") are scientific instruments that use a highly focused laser beam to provide an attractive or repulsive force (typically on the order of piconewtons), depending on the refractive index mismatch to physically hold and move microscopic dielectric objects similar to tweezers. Optical tweezers have been particularly successful in studying a variety of biological systems in recent years.