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Numerical techniques for Fresnel diffraction in computational
... dynamic monocular cue is motion parallax; the principle through which objects that are further from you appear to have less lateral movement than closer objects. This can be accomplished in 2D by the simple rotation or translation of a scene, and by properly including the parallax effect into the re ...
... dynamic monocular cue is motion parallax; the principle through which objects that are further from you appear to have less lateral movement than closer objects. This can be accomplished in 2D by the simple rotation or translation of a scene, and by properly including the parallax effect into the re ...
Chapter 4 Optical Resonator
... cleaved along crystal planes. These surfaces act as reflectors and therefore serve as the resonator mirrors. Consider a crystal with refractive index n = 3.6 placed in air (n = 1). The light reflects between two parallel surfaces separated by the distance d = 0.2 mm. Determine the spacing between re ...
... cleaved along crystal planes. These surfaces act as reflectors and therefore serve as the resonator mirrors. Consider a crystal with refractive index n = 3.6 placed in air (n = 1). The light reflects between two parallel surfaces separated by the distance d = 0.2 mm. Determine the spacing between re ...
Theoretical modeling and evaluation of the axial resolution of the
... observation. Brakenhoff and Muller4 discuss the advantage of a double-pass system and have shown that the full width at half maximum 共FWHM兲 of the point spread function 共PSF兲 of a double-pass system is smaller than that of a single-pass imaging system. For example, in confocal systems with small pin ...
... observation. Brakenhoff and Muller4 discuss the advantage of a double-pass system and have shown that the full width at half maximum 共FWHM兲 of the point spread function 共PSF兲 of a double-pass system is smaller than that of a single-pass imaging system. For example, in confocal systems with small pin ...
My PhD - Photonics Research Group
... ik dan zeker iemand zou vergeten. Maar in het bijzonder wil ik Hendrik, Steven en Liesbet bedanken voor het operationeel houden van de meetruimte en de clean room. I would also like to thank the PICCO project partners from Glasgow, St.-Andrews and Copenhagen. Special thanks to Harold for fabricating ...
... ik dan zeker iemand zou vergeten. Maar in het bijzonder wil ik Hendrik, Steven en Liesbet bedanken voor het operationeel houden van de meetruimte en de clean room. I would also like to thank the PICCO project partners from Glasgow, St.-Andrews and Copenhagen. Special thanks to Harold for fabricating ...
Inverse Problems In Multiple Light Scattering
... allows solving specific inverse problems. Traditional attempts to solve these kinds of inverse problems tend to rely on statistical average quantities and ignore the deterministic interaction between the optical field and the scattering structure. Thus, because ensemble averaging inherently destroys ...
... allows solving specific inverse problems. Traditional attempts to solve these kinds of inverse problems tend to rely on statistical average quantities and ignore the deterministic interaction between the optical field and the scattering structure. Thus, because ensemble averaging inherently destroys ...
Integrated Opto-Micro uidic Lab-on-a-Chip in
... fact lithium niobate can host high quality optical waveguides and complex devices such as multiplexers, switches and optical modulators which are commercially available, as well as Bragg gratings and Mach-Zehnder interferometers can be realized on a single lithium niobate crystal. In addition, lith ...
... fact lithium niobate can host high quality optical waveguides and complex devices such as multiplexers, switches and optical modulators which are commercially available, as well as Bragg gratings and Mach-Zehnder interferometers can be realized on a single lithium niobate crystal. In addition, lith ...
Studies of Nonlinear Femtosecond Pulse Propagation in Bulk
... This thesis applies FROG as a powerful tool for science and not just a useful pulse diagnostic technique. Studies of three-dimensional propagation provide an in-depth understanding of the processes involved in femtosecond pulse splitting. In addition, the experimental investigations of continuum gen ...
... This thesis applies FROG as a powerful tool for science and not just a useful pulse diagnostic technique. Studies of three-dimensional propagation provide an in-depth understanding of the processes involved in femtosecond pulse splitting. In addition, the experimental investigations of continuum gen ...
Optical Shop Testing
... merchantability or fitness for a particular purpose. No warranty may be created or extended by sales representatives or written sales materials. The advice and strategies contained herein may not be suitable for your situation. You should consult with a professional where appropriate. Neither the pu ...
... merchantability or fitness for a particular purpose. No warranty may be created or extended by sales representatives or written sales materials. The advice and strategies contained herein may not be suitable for your situation. You should consult with a professional where appropriate. Neither the pu ...
Adaptive Control of Ultrashort Laser Pulses for
... was emitted. Not much later the method of Q-switching was proposed by Hellwarth in 1961 [2] and pulsed laser output not much shorter than 100 ns was possible. The need for finer time resolution led to the discovery that many different laser modes can be coupled to form pulses with broader bandwidth. ...
... was emitted. Not much later the method of Q-switching was proposed by Hellwarth in 1961 [2] and pulsed laser output not much shorter than 100 ns was possible. The need for finer time resolution led to the discovery that many different laser modes can be coupled to form pulses with broader bandwidth. ...
Multiple-image digital photography
... {object} as shown above, can use to reconstruct object • assumes weakly refractive media and coherent plane illumination, must record amplitude and phase of forward scattered field 2006 Marc Levoy ...
... {object} as shown above, can use to reconstruct object • assumes weakly refractive media and coherent plane illumination, must record amplitude and phase of forward scattered field 2006 Marc Levoy ...
Chapter 4 Optical Resonator
... four variables-the coordinates (x, y) of its position in the plane, and the angles (e,, ey) that its projections in the x-z and y-z planes make with the z axis. The emerging ray is also characterized by four variables linearly related to the initial four variables. The optical system may then be cha ...
... four variables-the coordinates (x, y) of its position in the plane, and the angles (e,, ey) that its projections in the x-z and y-z planes make with the z axis. The emerging ray is also characterized by four variables linearly related to the initial four variables. The optical system may then be cha ...
Optical grating coupler biosensor and biomedical applications Lorena Diéguez Moure
... through different approaches. Low cost sensors in polymer substrates were investigated, as well as novel coatings for commercial sensors with different sputtered and evaporated materials. These new sensors will allow quick quantitative studies of the adsorption of biomolecules onto their surfaces, t ...
... through different approaches. Low cost sensors in polymer substrates were investigated, as well as novel coatings for commercial sensors with different sputtered and evaporated materials. These new sensors will allow quick quantitative studies of the adsorption of biomolecules onto their surfaces, t ...
Untitled
... effective way. Both continuous and quasi-distributed sensors are discussed. The continuous type of distributed sensor is based on the intrinsic effect existing in optic fibers (such as Rayleigh scattering). The most widely used type is optical time domain reflectrometry (OTDR), which has become an indis ...
... effective way. Both continuous and quasi-distributed sensors are discussed. The continuous type of distributed sensor is based on the intrinsic effect existing in optic fibers (such as Rayleigh scattering). The most widely used type is optical time domain reflectrometry (OTDR), which has become an indis ...
pdf file
... where ωT is the THz ferquency and n g (ωopt ) is the group refractive index at optical frquencies. In Fig. 1(a) is shown the group refractive index at 800 nm by a red horizontal line. The phase matching condition is satisfied at THz wave frequency of 2.1 THz. For the simulations under perfect phase ...
... where ωT is the THz ferquency and n g (ωopt ) is the group refractive index at optical frquencies. In Fig. 1(a) is shown the group refractive index at 800 nm by a red horizontal line. The phase matching condition is satisfied at THz wave frequency of 2.1 THz. For the simulations under perfect phase ...
Refractive-Index-Matched Indium--Tin
... iquid crystal display (LCD) technology is dominant for flat panel display applications ranging from lowpower handheld mobile phones to large scale highdefinition televisions. Core components of an LCD are the backlight unit (BLU), optical films, a liquid crystal (LC) panel with thin-film transistors (TF ...
... iquid crystal display (LCD) technology is dominant for flat panel display applications ranging from lowpower handheld mobile phones to large scale highdefinition televisions. Core components of an LCD are the backlight unit (BLU), optical films, a liquid crystal (LC) panel with thin-film transistors (TF ...
by ZHAOBING TIAN
... Fig. 2.1 LPG (a) coupling between core and cladding mode in one LPG (b) LPG Michelson interferometer (c) LPG Mach-Zehnder interferometer................................................... 13 Fig. 2.2 LPG Mach-Zehnder interferometric sensor (a) spectrum (b) wavelength shift due to the outer environme ...
... Fig. 2.1 LPG (a) coupling between core and cladding mode in one LPG (b) LPG Michelson interferometer (c) LPG Mach-Zehnder interferometer................................................... 13 Fig. 2.2 LPG Mach-Zehnder interferometric sensor (a) spectrum (b) wavelength shift due to the outer environme ...
References
... the speckle beam is divided into two twin beams by a 30mm glass cube beam splitter. In the first arm, the mirror M1 is kept fixed (and slightly tilted) at an effective2 distance z1=110mm. In the second arm, the mirror M2 is orthogonal to the optical axis and can be moved by using a computer-controll ...
... the speckle beam is divided into two twin beams by a 30mm glass cube beam splitter. In the first arm, the mirror M1 is kept fixed (and slightly tilted) at an effective2 distance z1=110mm. In the second arm, the mirror M2 is orthogonal to the optical axis and can be moved by using a computer-controll ...
Bessel beams: diffraction in a new light
... using a spatial light modulator [22], an axicon illuminated with a Laguerre-Gaussian beam [36, 37] as well as propagating a zeroth-order beam through a biaxial crystal [38]. Jarutis et al. examined the case of focusing a Laguerre- ...
... using a spatial light modulator [22], an axicon illuminated with a Laguerre-Gaussian beam [36, 37] as well as propagating a zeroth-order beam through a biaxial crystal [38]. Jarutis et al. examined the case of focusing a Laguerre- ...
Graphene Plasmonic Metasurfaces to Steer Infrared Light www.nature.com/scientificreports Zubin Li
... applications beyond strong absorption. Our numerical simulations show that the phase of the reflected light can vary from almost –π to π by selecting the width of the graphene ribbons as well as the thickness of the dielectric spacing layer, while the amplitude of reflectivity remains high and onl ...
... applications beyond strong absorption. Our numerical simulations show that the phase of the reflected light can vary from almost –π to π by selecting the width of the graphene ribbons as well as the thickness of the dielectric spacing layer, while the amplitude of reflectivity remains high and onl ...
Structural, Optical, Electrical and Thermal Characterizations of Pure
... (LA) with ADP crystals were studied by FT-IR by Dhanaraj [21]. The authors confirmed the interaction between ADP and organic amino acids by shifting the peak positions of P-O-H and PO vibrations compared to pure ADP. In this paper the FT-IR spectra of pure ADP and L-alanine doped ADP crystals are sh ...
... (LA) with ADP crystals were studied by FT-IR by Dhanaraj [21]. The authors confirmed the interaction between ADP and organic amino acids by shifting the peak positions of P-O-H and PO vibrations compared to pure ADP. In this paper the FT-IR spectra of pure ADP and L-alanine doped ADP crystals are sh ...
sensors Chemical Sensing Using Fiber Cavity Ring-Down Spectroscopy
... volumes of tens to hundreds of milliliters. Measurements on liquid samples require either filling the entire cavity with liquid [7,8] or placing the sample into a part of the optical cavity, e.g., contained by a cuvette [9-12], or in a free flowing liquid sheet [13,14]. In the latter experiments the ...
... volumes of tens to hundreds of milliliters. Measurements on liquid samples require either filling the entire cavity with liquid [7,8] or placing the sample into a part of the optical cavity, e.g., contained by a cuvette [9-12], or in a free flowing liquid sheet [13,14]. In the latter experiments the ...
Length Scales Analysis of Wave Scattering from Rough Surfaces
... altitudes) also plays an important role. To calculate the intensity of the scattered wave, we use r = 0 and r as the lower and upper limits of the integral respectively, where r and ξ have the same order of magnitude. For the case r x, the correlated function and the integrand will be zero. On the ...
... altitudes) also plays an important role. To calculate the intensity of the scattered wave, we use r = 0 and r as the lower and upper limits of the integral respectively, where r and ξ have the same order of magnitude. For the case r x, the correlated function and the integrand will be zero. On the ...
Propagation dynamics of optical vortices
... and thus we shall call it an r vortex. In the case of OVS’s or other localized cores, the amplitude can be modeled as tanh(r/wv), and we shall call this a tanh vortex. As the size of the tanh vortex vanishes (w v → 0) the vortex is said to become a point vortex. This paper was written to help develo ...
... and thus we shall call it an r vortex. In the case of OVS’s or other localized cores, the amplitude can be modeled as tanh(r/wv), and we shall call this a tanh vortex. As the size of the tanh vortex vanishes (w v → 0) the vortex is said to become a point vortex. This paper was written to help develo ...
Phase Matching and Coherence of High-Order Harmonic
... Over the last twenty years, high-order harmonic generation has emerged as a scientifically useful, temporally and spatially coherent source of extreme ultraviolet light. Because of the nature of the generation process, the harmonics are emitted in a series of attosecond bursts, creating a spectrosco ...
... Over the last twenty years, high-order harmonic generation has emerged as a scientifically useful, temporally and spatially coherent source of extreme ultraviolet light. Because of the nature of the generation process, the harmonics are emitted in a series of attosecond bursts, creating a spectrosco ...
Optical Nonlinearities in the Transparency Region of Bulk Semiconductors . W
... have been in semiconductors (Miller and Duncan, 1987; Hill et al., 1982) and involve near-gap excitation. However, these resonant nonlinearities, by their nature, involve significant linear absorption (see Chap. 1 in this volume and Chap. 5 in Vol. 59), which is undesirable in many applications. In ...
... have been in semiconductors (Miller and Duncan, 1987; Hill et al., 1982) and involve near-gap excitation. However, these resonant nonlinearities, by their nature, involve significant linear absorption (see Chap. 1 in this volume and Chap. 5 in Vol. 59), which is undesirable in many applications. In ...
Phase-contrast X-ray imaging
![](https://commons.wikimedia.org/wiki/Special:FilePath/Attenuation_and_phase_shift_of_electromagnetic_wave_propagating_in_medium_with_complex_index_of_refraction_n.png?width=300)
Phase-contrast X-ray imaging (PCI) or phase-sensitive X-ray imaging is a general term for different technical methods that use information concerning changes in the phase of an X-ray beam that passes through an object in order to create its images. Standard X-ray imaging techniques like radiography or computed tomography (CT) rely on a decrease of the X-ray beam's intensity (attenuation) when traversing the sample, which can be measured directly with the assistance of an X-ray detector. In PCI however, the beam's phase shift caused by the sample is not measured directly, but is transformed into variations in intensity, which then can be recorded by the detector.In addition to producing projection images, PCI, like conventional transmission, can be combined with tomographic techniques to obtain the 3D distribution of the real part of the refractive index of the sample. When applied to samples that consist of atoms with low atomic number Z, PCI is more sensitive to density variations in the sample than conventional transmission-based X-ray imaging. This leads to images with improved soft tissue contrast.In the last several years, a variety of phase-contrast X-ray imaging techniques have been developed, all of which are based on the observation of interference patterns between diffracted and undiffracted waves. The most common techniques are crystal interferometry, propagation-based imaging, analyzer-based imaging, edge-illumination and grating-based imaging (see below).