3D surface configuration modulates 2D symmetry detection
... The stimuli were random dot patterns with 15% dot density. We measured the coherence threshold, or the proportion of dots that were the mirror reflection of the other dots in the other half of the image about a central vertical axis, at 75% accuracy with a 2AFC paradigm under various 3D configurations ...
... The stimuli were random dot patterns with 15% dot density. We measured the coherence threshold, or the proportion of dots that were the mirror reflection of the other dots in the other half of the image about a central vertical axis, at 75% accuracy with a 2AFC paradigm under various 3D configurations ...
Extreme pulse-front tilt from an etalon
... rays, or angles, resulting in its well-known angular dispersion [12]. For a given beam size, etalons can be used to generate as much as 100 times more angular dispersion than gratings and prisms, and they have been used to construct high-resolution spectrometers [13,14] and pulse shapers [15]. By th ...
... rays, or angles, resulting in its well-known angular dispersion [12]. For a given beam size, etalons can be used to generate as much as 100 times more angular dispersion than gratings and prisms, and they have been used to construct high-resolution spectrometers [13,14] and pulse shapers [15]. By th ...
Single photon detection based devices and techniques for pulsed
... range of a target can be calculated based on the measured flight time of a laser pulse to and from the target. The amount of photons in an optical pulse sent by a TOF rangefinder to a target is typically in the range from millions to billions (for example a commonly used 10 W, 3 ns, 850 nm laser pul ...
... range of a target can be calculated based on the measured flight time of a laser pulse to and from the target. The amount of photons in an optical pulse sent by a TOF rangefinder to a target is typically in the range from millions to billions (for example a commonly used 10 W, 3 ns, 850 nm laser pul ...
Inverse Problems In Multiple Light Scattering
... inherently destroys specific characteristics of random processes, one can only recover limited information about the medium. This dissertation discusses practical means that go beyond ensemble averaging to probe complex media and extract additional information about a random scattering system. The d ...
... inherently destroys specific characteristics of random processes, one can only recover limited information about the medium. This dissertation discusses practical means that go beyond ensemble averaging to probe complex media and extract additional information about a random scattering system. The d ...
NON-TRAUMATIC RETINAL DETACHMENT IN A 60-YEAR
... Dynamic scanning may reveal undulating sinuous, or whiplash motion of the retinal membrane, though minority may remain stationary for years.1 ting motion of the V-shaped retinal membrane. The retina contracts to form a taut membrane stretched between the optic disc and periphery.1,5,6 Surgery is the ...
... Dynamic scanning may reveal undulating sinuous, or whiplash motion of the retinal membrane, though minority may remain stationary for years.1 ting motion of the V-shaped retinal membrane. The retina contracts to form a taut membrane stretched between the optic disc and periphery.1,5,6 Surgery is the ...
Final report
... Figure 11: Optical coupling between two co-propagating waveguides. ....................................... 24 Figure 12: Effective index of fundamental mode for different of silica and silk fibre sizes. ....... 25 Figure 13: Electric field profile of some higher order modes in silk fibres. ......... ...
... Figure 11: Optical coupling between two co-propagating waveguides. ....................................... 24 Figure 12: Effective index of fundamental mode for different of silica and silk fibre sizes. ....... 25 Figure 13: Electric field profile of some higher order modes in silk fibres. ......... ...
Multiterawatt few-cycle pulse OPCPA
... pulses were generated in 1996 at Lawrence Livermoore National Labs (LLNL, Nova 1.25PW, 0.5-ps) [16, 39]. This Petawatt amplifier was dismantled later to make way for the OMEGA-laser. Laser research facilities currently equipped with ”Petawatt-light” are the Rutherford Appleton Labs (RAL, Vulcan 1-PW, ...
... pulses were generated in 1996 at Lawrence Livermoore National Labs (LLNL, Nova 1.25PW, 0.5-ps) [16, 39]. This Petawatt amplifier was dismantled later to make way for the OMEGA-laser. Laser research facilities currently equipped with ”Petawatt-light” are the Rutherford Appleton Labs (RAL, Vulcan 1-PW, ...
Rubidium Bose-Einstein Condensates in Optical Lattices Gretchen K
... interferometrically using a two-pulse Ramsey interferometer. The two pulses were created using a one dimensional optical lattice. By measuring the resulting frequency as a function of the lattice detuning from the atomic resonance, we found a distinctive dispersive shape for the recoil frequency tha ...
... interferometrically using a two-pulse Ramsey interferometer. The two pulses were created using a one dimensional optical lattice. By measuring the resulting frequency as a function of the lattice detuning from the atomic resonance, we found a distinctive dispersive shape for the recoil frequency tha ...
Metal-dielectric-metal plasmonic waveguide devices for
... interfaces. Several different plasmonic waveguiding structures have been proposed, such as metallic nanowires[2,3] and metallic nanoparticle arrays[4,5]. Most of these structures support a highly-confined mode only near the surface plasmon frequency. In this regime, the optical mode typically has lo ...
... interfaces. Several different plasmonic waveguiding structures have been proposed, such as metallic nanowires[2,3] and metallic nanoparticle arrays[4,5]. Most of these structures support a highly-confined mode only near the surface plasmon frequency. In this regime, the optical mode typically has lo ...
LD Didactic (LEYBOLD) Scientific Teaching Manual
... Fig. 1.3: Absorption for three neighbouring transitions with of states. This gives rise to the ground state 4I9/2 from 5 sub-states different absorption strengths and the state 4F5/2, which can be pumped from 5 subs-tates. In principle an atom may have any number of energy lev- Since the wavelength ...
... Fig. 1.3: Absorption for three neighbouring transitions with of states. This gives rise to the ground state 4I9/2 from 5 sub-states different absorption strengths and the state 4F5/2, which can be pumped from 5 subs-tates. In principle an atom may have any number of energy lev- Since the wavelength ...
Quantitative study of single molecule location estimation techniques
... likelihood estimator can achieve the best possible accuracy for a few specific scenarios [13,14]. Reports in the deconvolution literature also show that maximum likelihood based algorithms can produce more accurate results than least squares based algorithms especially for quantum limited data, i.e. ...
... likelihood estimator can achieve the best possible accuracy for a few specific scenarios [13,14]. Reports in the deconvolution literature also show that maximum likelihood based algorithms can produce more accurate results than least squares based algorithms especially for quantum limited data, i.e. ...
Evaluation of Optical Formation Measurements on Printing
... way is to measure the optical formation, which is based on a transmission of light. This method is faster and less expensive than β-radiation, but unfortunately, it can give misleading results. The light transmission in optical formation is affected by fillers, which have other optical properties th ...
... way is to measure the optical formation, which is based on a transmission of light. This method is faster and less expensive than β-radiation, but unfortunately, it can give misleading results. The light transmission in optical formation is affected by fillers, which have other optical properties th ...
Predicting nonlinear properties of metamaterials from the linear
... The third harmonic generation was analysed in the same manner as done for the second harmonic case, that is, according to Miller’s rule based on far-field polarizabilities. In the THG case, we find that Miller’s rule (Supplementary Fig. 7c) predicts a similar dependence on geometry to that seen in t ...
... The third harmonic generation was analysed in the same manner as done for the second harmonic case, that is, according to Miller’s rule based on far-field polarizabilities. In the THG case, we find that Miller’s rule (Supplementary Fig. 7c) predicts a similar dependence on geometry to that seen in t ...
Full text - Simon Fraser University
... Two-dimensional materials, single-layer crystals of atomic thickness, including graphene and boron nitride, have attracted much interest in the last few decades. When electrons are confined to move in two dimensions, several extraordinary applications arise due to this physical effect. For example, th ...
... Two-dimensional materials, single-layer crystals of atomic thickness, including graphene and boron nitride, have attracted much interest in the last few decades. When electrons are confined to move in two dimensions, several extraordinary applications arise due to this physical effect. For example, th ...
Bimodal waveguide interferometer device based high sensitive biosensing
... Scheme of a interferometer based on Mach-Zehnder configuration Cosine dependence of interferometric signals. . . . . . . . . . . . Optical arrangement and representation of a Young Interferometric biosensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Schematic of a dual polarization i ...
... Scheme of a interferometer based on Mach-Zehnder configuration Cosine dependence of interferometric signals. . . . . . . . . . . . Optical arrangement and representation of a Young Interferometric biosensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Schematic of a dual polarization i ...
Integrated Optic/Nanofluidic Detection Device with Plasmonic Readout
... fluid within the microfluidic channel. Light from some source is focused via external optics to a spot inside the channel. Light emitted from the sample is collected via optics and filtered externally. There are many sources of noise in this system, as both the excitation and signal light must trave ...
... fluid within the microfluidic channel. Light from some source is focused via external optics to a spot inside the channel. Light emitted from the sample is collected via optics and filtered externally. There are many sources of noise in this system, as both the excitation and signal light must trave ...
Adaptation of the central retina for high acuity vision: Cones, the
... occupy habitats where the view is obscured by vegetation, in which the retinal specializations comprise a combination of both visual streak and area centralis (Tancred, 1981). In Strepsirrhine primates (e.g., lemurs, lorises, galagos), the area centralis is the most common form of retinal specializa ...
... occupy habitats where the view is obscured by vegetation, in which the retinal specializations comprise a combination of both visual streak and area centralis (Tancred, 1981). In Strepsirrhine primates (e.g., lemurs, lorises, galagos), the area centralis is the most common form of retinal specializa ...
Applications of spatial light modulators for optical trapping and
... has significant influence on the focal intensity distribution in the beam cross section. For these reasons it appears interesting to manipulate not only amplitude or phase of a light beam, but also its polarization. In Chapter 3 we present a setup for the generation of so called vector beams – laser ...
... has significant influence on the focal intensity distribution in the beam cross section. For these reasons it appears interesting to manipulate not only amplitude or phase of a light beam, but also its polarization. In Chapter 3 we present a setup for the generation of so called vector beams – laser ...
document
... photon detection probability (PDP), and is commonly called the geometry factor. is a function of the optical coupling efficiency and the fill factor of the SPAD array. It should be noted that fill factors and PDPs quoted in the literature for SPAD arrays generally assume light to be orthogonally inc ...
... photon detection probability (PDP), and is commonly called the geometry factor. is a function of the optical coupling efficiency and the fill factor of the SPAD array. It should be noted that fill factors and PDPs quoted in the literature for SPAD arrays generally assume light to be orthogonally inc ...
A very convenient setup to generate intense VUV coherent light at
... is observed in a spectral region of positive dispersion of nonlinear medium, where phasematching is not satisfied under tight-focusing conditions. Until the present, the reason for efficient VUV generation at 125.140 nm has been an open question. (ii) On the contrary, sum generation at 125.053 nm corr ...
... is observed in a spectral region of positive dispersion of nonlinear medium, where phasematching is not satisfied under tight-focusing conditions. Until the present, the reason for efficient VUV generation at 125.140 nm has been an open question. (ii) On the contrary, sum generation at 125.053 nm corr ...
Word - The Open University
... more light power from a laser diode than from an LED to an optical fibre, and the spectral linewidth of an LED is much broader than that of a laser diode. The lower power coupling from an LED comes partly from the fact that LEDs generally emit lower light power than laser diodes (the output from an ...
... more light power from a laser diode than from an LED to an optical fibre, and the spectral linewidth of an LED is much broader than that of a laser diode. The lower power coupling from an LED comes partly from the fact that LEDs generally emit lower light power than laser diodes (the output from an ...
Lock Acquisition and Sensitivity Analysis of Advanced LIGO
... Laser interferometer gravitational wave observatory (LIGO) consists of two complex large-scale laser interferometers designed for direct detection of gravitational waves from distant astrophysical sources in the frequency range 10Hz - 5kHz. Direct detection of space-time ripples will support Einstei ...
... Laser interferometer gravitational wave observatory (LIGO) consists of two complex large-scale laser interferometers designed for direct detection of gravitational waves from distant astrophysical sources in the frequency range 10Hz - 5kHz. Direct detection of space-time ripples will support Einstei ...
STED Microscopy
... Using pulsed lasers allows for concentration of the available average power into increased peak powers for time intervals immediately following excitation where the depletion process is most efficient. As a result, Psat (measured as average power) is lower than in STED systems using continuous wave ( ...
... Using pulsed lasers allows for concentration of the available average power into increased peak powers for time intervals immediately following excitation where the depletion process is most efficient. As a result, Psat (measured as average power) is lower than in STED systems using continuous wave ( ...
Macular pigments: their characteristics and putative role
... 1984; Robson et al., 2003) and the extent also appears to be influenced by age (Chang et al., 2002). The psychophysical evaluations of the spatial profile of MP density are painstaking and lengthy measurements. Also, the resolution of such measurements is limited to the size of the visual stimulus tha ...
... 1984; Robson et al., 2003) and the extent also appears to be influenced by age (Chang et al., 2002). The psychophysical evaluations of the spatial profile of MP density are painstaking and lengthy measurements. Also, the resolution of such measurements is limited to the size of the visual stimulus tha ...
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.