ULTRAFAST MEASUREMENT OF THE OPTICAL
... The experimental arrangement for USI is shown schematically in Fig. 1. The thin film targets were mounted on a computer-controlled x-y translation stage. The target was rastered about 4 laser diameters between experiments so that each laserdriven shock would propagate into undisturbed material. Expe ...
... The experimental arrangement for USI is shown schematically in Fig. 1. The thin film targets were mounted on a computer-controlled x-y translation stage. The target was rastered about 4 laser diameters between experiments so that each laserdriven shock would propagate into undisturbed material. Expe ...
Deriving Abbe`s Certainty from Heisenberg`s Uncertainties Ernst HK
... Meyerhofstrasse 1, D-69117 Heidelberg, Germany, stelzer@embl.de More than a century ago, Ernst Abbe realized that resolving power is subject to fundamental physical and not technical limits [1]. Abbe based his reasoning on the behavior of a plane monochromatic wave of wavelength λ, which is diffract ...
... Meyerhofstrasse 1, D-69117 Heidelberg, Germany, stelzer@embl.de More than a century ago, Ernst Abbe realized that resolving power is subject to fundamental physical and not technical limits [1]. Abbe based his reasoning on the behavior of a plane monochromatic wave of wavelength λ, which is diffract ...
The Michelson Interferometer
... The Michelson interferometer is an example of an amplitude-splitting interferometer. It is a high precision instrument which can be used to measure very small displacements, to compare two wavelengths of light to a high accuracy and to measure refractive indices. Its configuration is illustrated in ...
... The Michelson interferometer is an example of an amplitude-splitting interferometer. It is a high precision instrument which can be used to measure very small displacements, to compare two wavelengths of light to a high accuracy and to measure refractive indices. Its configuration is illustrated in ...
Yellow nanosecond sum-frequency generating optical
... copper vapour lasers at 578 nm and dye lasers operating at 585 nm and 595 nm. These lasers are both bulky and inefficient and it would be attractive to develop a solid-state alternative to these lasers. One path that has been followed for the generation of yellow light is second harmonic generation ...
... copper vapour lasers at 578 nm and dye lasers operating at 585 nm and 595 nm. These lasers are both bulky and inefficient and it would be attractive to develop a solid-state alternative to these lasers. One path that has been followed for the generation of yellow light is second harmonic generation ...
Interference of light Ordinary illumination Interference fringes
... coherence of the light source S can be disposed of if we use a laser, which has transverse coherence across its beam What happens when the intensity of the light is so low that only single photons pass through the apparatus at a time? The equivalent of Young’s slits work for electrons, neutron ...
... coherence of the light source S can be disposed of if we use a laser, which has transverse coherence across its beam What happens when the intensity of the light is so low that only single photons pass through the apparatus at a time? The equivalent of Young’s slits work for electrons, neutron ...
A Practical Guide to Optical Trapping
... a 1064–nm wavelength trapping laser. This combination of bead size and laser wavelength puts the real physics somewhere between the ray–optic and dipole regimes. The full theory of Mie scattering can get quite complicated, but the intuition gained from the other representations shown in Figure 2 rem ...
... a 1064–nm wavelength trapping laser. This combination of bead size and laser wavelength puts the real physics somewhere between the ray–optic and dipole regimes. The full theory of Mie scattering can get quite complicated, but the intuition gained from the other representations shown in Figure 2 rem ...
PowerPoint (PPT) One: The theories of light in historical perspective
... get help? In google, type in: “total internal reflection” + “underwater observer looking up”, first with quotation marks, then without them, and you should get links to Web documents in which the problem is discussed. PPT Four – it’s “self-explanatory”, I believe. Ray focusing by a concave mirror: T ...
... get help? In google, type in: “total internal reflection” + “underwater observer looking up”, first with quotation marks, then without them, and you should get links to Web documents in which the problem is discussed. PPT Four – it’s “self-explanatory”, I believe. Ray focusing by a concave mirror: T ...
PowerPoint (PPT) One: The theories of light in historical perspective
... get help? In google, type in: “total internal reflection” + “underwater observer looking up”, first with quotation marks, then without them, and you should get links to Web documents in which the problem is discussed. PPT Four – it’s “self-explanatory”, I believe. Ray focusing by a concave mirror: T ...
... get help? In google, type in: “total internal reflection” + “underwater observer looking up”, first with quotation marks, then without them, and you should get links to Web documents in which the problem is discussed. PPT Four – it’s “self-explanatory”, I believe. Ray focusing by a concave mirror: T ...
Advantages of Holographic Optical Tweezers
... Stimulated by the work in the area of cooling atoms the first schemes of using light for trapping microscopic particles were used in the 1970s?, ? . In most of these experiments two laser beams were used to accomplish a stable trap. In 1986 Ashkin et al.? realized a single beam gradient force optica ...
... Stimulated by the work in the area of cooling atoms the first schemes of using light for trapping microscopic particles were used in the 1970s?, ? . In most of these experiments two laser beams were used to accomplish a stable trap. In 1986 Ashkin et al.? realized a single beam gradient force optica ...
Coherence scanning interferometry: linear theory of surface
... http://dx.doi.org/10.1364/AO.52.003662. ...
... http://dx.doi.org/10.1364/AO.52.003662. ...
Get
... femtosecond mode-locked lasers [1], [2]. Since then, these combs allowed for example the development of optical atomic clocks [3],[4], tests of possible variations of fundamental constants [5], extreme nonlinear optics [6], sensitive, high resolution and broadband spectroscopy [7],[8],[9], and high- ...
... femtosecond mode-locked lasers [1], [2]. Since then, these combs allowed for example the development of optical atomic clocks [3],[4], tests of possible variations of fundamental constants [5], extreme nonlinear optics [6], sensitive, high resolution and broadband spectroscopy [7],[8],[9], and high- ...
To determine the wavelength of a monochromatic source of light
... 1. The bed of the optical bench is levelled by a sprit level and the levelling screws. 2. Light source and slit is arranged in order to get the maximum light incident on the slit. 3. The centre of slit, biprism and eye piece is arranged at same height as shown in Figure.1. 4. The slit and biprism ed ...
... 1. The bed of the optical bench is levelled by a sprit level and the levelling screws. 2. Light source and slit is arranged in order to get the maximum light incident on the slit. 3. The centre of slit, biprism and eye piece is arranged at same height as shown in Figure.1. 4. The slit and biprism ed ...
EVERYDAY ENGINEERING EXAMPLES FOR SIMPLE CONCEPTS
... between the electromagnetic radiation and atoms, ions, and/or electrons. Atoms and molecules contain electrons. It is often useful to think of these electrons as being attached to the atoms by springs. The electrons and their attached springs have a tendency to vibrate at specific frequencies. Simil ...
... between the electromagnetic radiation and atoms, ions, and/or electrons. Atoms and molecules contain electrons. It is often useful to think of these electrons as being attached to the atoms by springs. The electrons and their attached springs have a tendency to vibrate at specific frequencies. Simil ...
Advanced Microscopy
... their centers are further apart than the first minimum of the Airy function (see figure 2.12, the minimum is at 1.22 ). Following this typical confocal definition, the resolution can be defined as in equation 2.63.setup The height of the intensity dip in the middle of the structure amounts to ...
... their centers are further apart than the first minimum of the Airy function (see figure 2.12, the minimum is at 1.22 ). Following this typical confocal definition, the resolution can be defined as in equation 2.63.setup The height of the intensity dip in the middle of the structure amounts to ...
Design of illumination and projection optics for projectors with single
... degenerate into the efficiency of an ideal point source as ZARC decreases to less than 0.6 mm. For high efficiency to be achieved, the relay system must be well corrected and have an étendue close to that of the DMD, thus preventing the light flux loss. Figure 6 also shows that the values of COUPL ...
... degenerate into the efficiency of an ideal point source as ZARC decreases to less than 0.6 mm. For high efficiency to be achieved, the relay system must be well corrected and have an étendue close to that of the DMD, thus preventing the light flux loss. Figure 6 also shows that the values of COUPL ...
Lecture 18
... microscope can be characterized by the modulation transfer function (MTF) • MTF is measurement of microscope's ability to transfer contrast from the specimen to the image plane at specific resolution. • Incorporates resolution and contrast into one specification ...
... microscope can be characterized by the modulation transfer function (MTF) • MTF is measurement of microscope's ability to transfer contrast from the specimen to the image plane at specific resolution. • Incorporates resolution and contrast into one specification ...
All Solid State Laser Source for Tunable Blue and Ultraviolet Radiation.
... all other feedback sources, unavoidable feedback from the antireflection coated input surface of the first Faraday isolator still disturbs the laser. We, therefore, lock the laser to feedback from the frequency doubler cavity14 which dominates all other feedback sources. One optical isolator ~40 dB ...
... all other feedback sources, unavoidable feedback from the antireflection coated input surface of the first Faraday isolator still disturbs the laser. We, therefore, lock the laser to feedback from the frequency doubler cavity14 which dominates all other feedback sources. One optical isolator ~40 dB ...
Presentation - University of Arizona
... magnification. When the optical system is in air, nodal points/planes coincide with the principal points/planes. Principal points/planes can be described using Newtonian equations or Gaussian equations which measure the distances from focal planes or principal planes respectively. (Here the Gaussi ...
... magnification. When the optical system is in air, nodal points/planes coincide with the principal points/planes. Principal points/planes can be described using Newtonian equations or Gaussian equations which measure the distances from focal planes or principal planes respectively. (Here the Gaussi ...
1. Introduction - Univerza v Ljubljani
... The force is deccelerating for negative detuning but is accelerative for positive detuning. Also, for low velocites, the kv terms in the denominator can be neglected towards 0 , thus making the force proportional to the velocity. This is then a true damping force, thus it compresses the velocity ...
... The force is deccelerating for negative detuning but is accelerative for positive detuning. Also, for low velocites, the kv terms in the denominator can be neglected towards 0 , thus making the force proportional to the velocity. This is then a true damping force, thus it compresses the velocity ...
Measurement of the Wavelength by Diffraction Gratings
... of higher intensities can be produced (Fig11). Moreover the fringes are formed far apart from one another. For this purpose Fraunhofer made the first grating. An ideal diffraction grating consists of a large number of fine equidistant parallel grooves ruled on a plate of glass. The region between tw ...
... of higher intensities can be produced (Fig11). Moreover the fringes are formed far apart from one another. For this purpose Fraunhofer made the first grating. An ideal diffraction grating consists of a large number of fine equidistant parallel grooves ruled on a plate of glass. The region between tw ...
Chapter 2 Optical fibers
... approached with a large α . A parabolic-index profile corresponds to α = 2 . The multipath dispersion or intermodal dispersion is reduced with graded-index fibers. The reason is that the path is longer for more oblique rays, but the ray velocity changes along the path because of variations in the re ...
... approached with a large α . A parabolic-index profile corresponds to α = 2 . The multipath dispersion or intermodal dispersion is reduced with graded-index fibers. The reason is that the path is longer for more oblique rays, but the ray velocity changes along the path because of variations in the re ...
Document
... An enhanced multimedia experience including audio, video and photo sharing Enhanced dining experience Concierge service Concept mapping Collaboration and instruction on Interactive Whiteboards ...
... An enhanced multimedia experience including audio, video and photo sharing Enhanced dining experience Concierge service Concept mapping Collaboration and instruction on Interactive Whiteboards ...
Focal/grid laser has been given in
... The eye that never received anti-VEGF treatment should be randomized If both eyes have previously received anti-VEGF treatment or both eyes have never received antiVEGF treatment, then the study eye should be selected by the investigator and the participant ...
... The eye that never received anti-VEGF treatment should be randomized If both eyes have previously received anti-VEGF treatment or both eyes have never received antiVEGF treatment, then the study eye should be selected by the investigator and the participant ...
Microscopy 1: Optical
... To provide a magnified image To observe features that are beyond the resolution of the human eyes (~100mm) ─ directly by light (optical) microscope using visible light ─ other microscopy imaging techniques use some other interaction probe and response signal (usually electrons) to provide the co ...
... To provide a magnified image To observe features that are beyond the resolution of the human eyes (~100mm) ─ directly by light (optical) microscope using visible light ─ other microscopy imaging techniques use some other interaction probe and response signal (usually electrons) to provide the co ...
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.