Why use LEDs? www.vexica.com
... The most common symptom of LED failure is the gradual lowering of light output and loss of efficiency. To quan;ta;vely classify life;me in a standardized manner it has become widely ...
... The most common symptom of LED failure is the gradual lowering of light output and loss of efficiency. To quan;ta;vely classify life;me in a standardized manner it has become widely ...
Dynamic lighting system for specular surface inspection
... To perform surface inspection, one can imagine that the object is moving in front of the camera and the lighting system.7 The projection of the luminous and dark fringes on the complex geometry of the surface varies a lot between two consecutive images. So each defect is not ensured to be close to a ...
... To perform surface inspection, one can imagine that the object is moving in front of the camera and the lighting system.7 The projection of the luminous and dark fringes on the complex geometry of the surface varies a lot between two consecutive images. So each defect is not ensured to be close to a ...
PowerPoint, 3.4M
... Image f(x) is sampled at x/2 instead of x; it contains 2N instead of N pixels. The transform is sampled at 1/(2Nx/2) = 1/(Nx); i.e. unchanged. However, since there are 2N instead of N steps, the resolution is twice as good. ...
... Image f(x) is sampled at x/2 instead of x; it contains 2N instead of N pixels. The transform is sampled at 1/(2Nx/2) = 1/(Nx); i.e. unchanged. However, since there are 2N instead of N steps, the resolution is twice as good. ...
An Injection-Locked 674 nm Laser for Strontium-88
... I appreciate that he has held my work to such a high standard that I have learned more than I thought possible. Peter, with his detailed knowledge of every component of a laser, offered crucial pieces of advice that allowed me to demonstrate injection-locking. He is always encouraging and willing to ...
... I appreciate that he has held my work to such a high standard that I have learned more than I thought possible. Peter, with his detailed knowledge of every component of a laser, offered crucial pieces of advice that allowed me to demonstrate injection-locking. He is always encouraging and willing to ...
Lesson 2.5 (19-52 Custom) - MOC-FV
... b. Since a cannot be negative and the maximum capacity of the tank is 100 liters, the relevant domain of a is 0 ≤ a ≤ 90. There is a horizontal asymptote at y = 0.6, the ratio of the leading coefficients of the numerator and denominator, because the degrees of the polynomials are equal. c. Sample an ...
... b. Since a cannot be negative and the maximum capacity of the tank is 100 liters, the relevant domain of a is 0 ≤ a ≤ 90. There is a horizontal asymptote at y = 0.6, the ratio of the leading coefficients of the numerator and denominator, because the degrees of the polynomials are equal. c. Sample an ...
Stabler, Graham (2005) High resolution wide field surface plasmon
... the light to propagate laterally through the film before re-emitting, to allow this to happen the film must form part of a leaky waveguide structure. Conventionally this would mean that the film would be surrounded by cladding of lower refractive index, this again is rather impractical. Looking at t ...
... the light to propagate laterally through the film before re-emitting, to allow this to happen the film must form part of a leaky waveguide structure. Conventionally this would mean that the film would be surrounded by cladding of lower refractive index, this again is rather impractical. Looking at t ...
Fast Light, Slow Light and Optical Precursors: What
... by Daniel J. Gauthier, Duke University, and Robert W. Boyd, University of Rochester ...
... by Daniel J. Gauthier, Duke University, and Robert W. Boyd, University of Rochester ...
CHAPTER 3
... 1- Impurities in fiber material - occurs due to electronic transitions between the energy levels and because of charge transitions from one ion to another. A major source of attenuation is from transition of metal impurity ions such as iron, chromium, cobalt, and copper 2- Intrinsic absorption- Intr ...
... 1- Impurities in fiber material - occurs due to electronic transitions between the energy levels and because of charge transitions from one ion to another. A major source of attenuation is from transition of metal impurity ions such as iron, chromium, cobalt, and copper 2- Intrinsic absorption- Intr ...
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... from under the lamp the UV intensity remains high. Where previously, without a cover, at 30 mm there was negligible UV intensity, this is now increased to 10-14 W/m2. The intensity remains high until 90 mm either side of the lamp. The cover ends at 100 mm, thus the UV intensity outside this range is ...
... from under the lamp the UV intensity remains high. Where previously, without a cover, at 30 mm there was negligible UV intensity, this is now increased to 10-14 W/m2. The intensity remains high until 90 mm either side of the lamp. The cover ends at 100 mm, thus the UV intensity outside this range is ...
I13-02: Effect of concentration ratio of iron/manganese on coloration
... and Mn3+ [5]. In the presence of both manganese and iron ions, multivalent ions can bring together interaction take place between them. Resulted valence balance for each element is different from that state that these elements existed by themselves [6]. To the understanding of these redox reaction o ...
... and Mn3+ [5]. In the presence of both manganese and iron ions, multivalent ions can bring together interaction take place between them. Resulted valence balance for each element is different from that state that these elements existed by themselves [6]. To the understanding of these redox reaction o ...
Plasmon-Induced Transparency in Metamaterials *
... shapes while maintaining consistent optical properties that do not depend on the dimensions of the device. They can be designed for applications in either free space optics or an integrated optical circuit and, in particular, for slow light and enhanced nonlinear effects [19,20]. Additionally, it is ...
... shapes while maintaining consistent optical properties that do not depend on the dimensions of the device. They can be designed for applications in either free space optics or an integrated optical circuit and, in particular, for slow light and enhanced nonlinear effects [19,20]. Additionally, it is ...
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... larized, and is spatially modulated by passing it through an amplitude mask that creates a gridlike intensity pattern at the crystal input face. Such a periodic spatial modulation, as previously generated from multibeam interference 关9兴, provides ‘‘seeding noise’’ for observation of induced modulati ...
... larized, and is spatially modulated by passing it through an amplitude mask that creates a gridlike intensity pattern at the crystal input face. Such a periodic spatial modulation, as previously generated from multibeam interference 关9兴, provides ‘‘seeding noise’’ for observation of induced modulati ...
Liquid-crystal photonic applications
... When high polymer concentrations are used in the mixture, the liquid-crystal and polymer can become phase separated after polymerization. In this case, micrometer-sized droplets of liquid-crystal are embedded in a polymer matrix as shown in Fig. 3(b). Such polymer dispersed liquid-crystals (PDLCs) h ...
... When high polymer concentrations are used in the mixture, the liquid-crystal and polymer can become phase separated after polymerization. In this case, micrometer-sized droplets of liquid-crystal are embedded in a polymer matrix as shown in Fig. 3(b). Such polymer dispersed liquid-crystals (PDLCs) h ...
Single Longitudinal Mode Blue-Violet Laser Diode for Data Storage
... longitudinal modes and have thus a sub-millimeter coherence length. Optical data storage technologies requiring coherent interference, such as holographic e.g., will benefit from having a compact blue-violet laser diode source with a long coherence length and some level of wavelength tuning. Prior a ...
... longitudinal modes and have thus a sub-millimeter coherence length. Optical data storage technologies requiring coherent interference, such as holographic e.g., will benefit from having a compact blue-violet laser diode source with a long coherence length and some level of wavelength tuning. Prior a ...
Compact Optical Fiber Amplifier
... amplifiers, but it has the weak point that the backward Amplified Spontaneous Emission (ASE) wastes pumping power near the input terminal of the EDF, and this behavior causes a degradation of the output power of the amplifier and noise figure characteristics. Therefore, the middle isolator is used t ...
... amplifiers, but it has the weak point that the backward Amplified Spontaneous Emission (ASE) wastes pumping power near the input terminal of the EDF, and this behavior causes a degradation of the output power of the amplifier and noise figure characteristics. Therefore, the middle isolator is used t ...
Pulsar scintillations from corrugated reconnection sheets in the ISM
... The observed scattered images at 20 mas require deflection angles of at least 40 mas, corresponding to ne ∼ 10 neglecting geometric alignment factors. The mean density of the IISM is typically 10−2 from dispersion measure. This picture is also challenging to implement, since the observed scattering ...
... The observed scattered images at 20 mas require deflection angles of at least 40 mas, corresponding to ne ∼ 10 neglecting geometric alignment factors. The mean density of the IISM is typically 10−2 from dispersion measure. This picture is also challenging to implement, since the observed scattering ...
Influence of substrate configuration on the angular response pattern
... therefore cancel, giving rise to the fact that dipole antennas do not radiate along the antenna axis. However, in all directions perpendicular to and at the center of the antenna axis, there is no phase difference between the radiated fields because there is no spatial difference, and therefore thei ...
... therefore cancel, giving rise to the fact that dipole antennas do not radiate along the antenna axis. However, in all directions perpendicular to and at the center of the antenna axis, there is no phase difference between the radiated fields because there is no spatial difference, and therefore thei ...
Failure of the Quasimonochromatic Approximation for Ultrashort
... pulse propagation is widely accepted and employed throughout physics [1] with central importance in optics [2], electromagnetics [3], and acoustics [4]. This description is based on the slowly varying envelope or quasimonochromatic approximation [5–7], originally defined by Born and Wolf [2] in the ...
... pulse propagation is widely accepted and employed throughout physics [1] with central importance in optics [2], electromagnetics [3], and acoustics [4]. This description is based on the slowly varying envelope or quasimonochromatic approximation [5–7], originally defined by Born and Wolf [2] in the ...
Nonlinear Microstructure Fibers
... In a microstructure fiber the cladding contains holes, and the core can either be solid glass or open air. The arrangement, shape, and size of the holes in the fiber will determine the wave-guiding properties of the fiber. Microstructure fibers allow for the tailoring of waveguides in such a way tha ...
... In a microstructure fiber the cladding contains holes, and the core can either be solid glass or open air. The arrangement, shape, and size of the holes in the fiber will determine the wave-guiding properties of the fiber. Microstructure fibers allow for the tailoring of waveguides in such a way tha ...
Athermal laser design
... into athermal circuit-based guides and materials-based guides. Circuit based guides have been used to create finite impulse response (FIR) filters where the temperature sensitivity of the center wavelength is reduced significantly [1,2]. Some of the common FIR filters that can be made athermal are s ...
... into athermal circuit-based guides and materials-based guides. Circuit based guides have been used to create finite impulse response (FIR) filters where the temperature sensitivity of the center wavelength is reduced significantly [1,2]. Some of the common FIR filters that can be made athermal are s ...
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... the simulated THz pulse width being equal to the experimental one at the focus. The experimental and simulated temporal waveforms of the THz field at the focus are plotted in figure 5. It is seen from the figure that the pulse widths agree with each other but the pulse shapes are slightly different. ...
... the simulated THz pulse width being equal to the experimental one at the focus. The experimental and simulated temporal waveforms of the THz field at the focus are plotted in figure 5. It is seen from the figure that the pulse widths agree with each other but the pulse shapes are slightly different. ...