Class 3b Laser Safety
... Safety guidelines that apply to lasers of all power classes 1. Never, under any circumstances, look into the beam of any laser! I don't care if you have safety glasses, or if it's only a 2mW keychain pointer. Don't do it! For one thing, don't get into a habit of looking into the beam with cheap poin ...
... Safety guidelines that apply to lasers of all power classes 1. Never, under any circumstances, look into the beam of any laser! I don't care if you have safety glasses, or if it's only a 2mW keychain pointer. Don't do it! For one thing, don't get into a habit of looking into the beam with cheap poin ...
Effect of ABCD transformations on beam paraxiality
... The concept of paraxiality applied to optical beams refers to how accurate is the paraxial approximation (PA) for describing the propagation of a light beam through a given optical system. The ondulatory foundation of the PA is based on the assumption that the complex amplitude of the field slowly v ...
... The concept of paraxiality applied to optical beams refers to how accurate is the paraxial approximation (PA) for describing the propagation of a light beam through a given optical system. The ondulatory foundation of the PA is based on the assumption that the complex amplitude of the field slowly v ...
Particle sizing calibration with refractive index correction for light
... Particle sizing is only one aspect of the function of an OPC. The other is particle concentration measurement. Although this work does not deal directly with this aspect of calibration, it is useful to consider some of the problems which may be encountered with the data presented here. For a closed ...
... Particle sizing is only one aspect of the function of an OPC. The other is particle concentration measurement. Although this work does not deal directly with this aspect of calibration, it is useful to consider some of the problems which may be encountered with the data presented here. For a closed ...
INFLUENCE OF OPTICAL PROPERTIES AND FIBERSEPARATION ON LASER DOPPLER FLOWMETRY
... theoretically using either a Monte Carlo simulation model4, 5 or a lattice random-walk model6. The latter two reports did not only show that the sampling depth increases with fiber separation but also that the it is affected by the optical properties of the tissue. In addition, Weiss et al. shows th ...
... theoretically using either a Monte Carlo simulation model4, 5 or a lattice random-walk model6. The latter two reports did not only show that the sampling depth increases with fiber separation but also that the it is affected by the optical properties of the tissue. In addition, Weiss et al. shows th ...
Modes in Optical Fibers
... The diameter of the laser beam incident on the lens can be determined by d = do*(1+(zΦ+do)2)1/2 where Φ is the angle of divergence ( ≈1.3 mrad) z is the laser to lens distance. d1 is otherwise approximately given by, d1 = 2a [.65 + 1.619/V1.5 + 2.879/V6] Focal point Laser ...
... The diameter of the laser beam incident on the lens can be determined by d = do*(1+(zΦ+do)2)1/2 where Φ is the angle of divergence ( ≈1.3 mrad) z is the laser to lens distance. d1 is otherwise approximately given by, d1 = 2a [.65 + 1.619/V1.5 + 2.879/V6] Focal point Laser ...
DUE: Tuesday, Jan. 20, 2015 Solutions Take Home Test
... ____ 1. interferes with hydrogen bonding between water molecules ____ 2. dissolving medium ____ 3. homogeneous mixture of water and dissolved substances ____ 4. Solute ions or molecules are surrounded by solvent molecules. ____ 5. compound that will conduct current in the liquid state or in aqueous ...
... ____ 1. interferes with hydrogen bonding between water molecules ____ 2. dissolving medium ____ 3. homogeneous mixture of water and dissolved substances ____ 4. Solute ions or molecules are surrounded by solvent molecules. ____ 5. compound that will conduct current in the liquid state or in aqueous ...
Ultrafast Spectroscopy of Atomic and Molecular Quantum Dynamics Pia Johansson
... An all-pervading feature of the work presented in this thesis is the study of ultrafast dynamics, both theoretically and experimentally, in terms of timedependent wave functions (wave packets). We have experimentally, by pump-probe fluorescence spectroscopy, examined spin-orbit interactions, by time ...
... An all-pervading feature of the work presented in this thesis is the study of ultrafast dynamics, both theoretically and experimentally, in terms of timedependent wave functions (wave packets). We have experimentally, by pump-probe fluorescence spectroscopy, examined spin-orbit interactions, by time ...
Reaction Kinetics Basics
... real numbers or zero, the operator Π means that the product of all terms behind it should be calculated and NS is the number of species. In the case of some reactions, the form of Eq. (2.3) is applicable over a wide range of concentrations. When the reaction rate is calculated by Eq. (2.3), molar co ...
... real numbers or zero, the operator Π means that the product of all terms behind it should be calculated and NS is the number of species. In the case of some reactions, the form of Eq. (2.3) is applicable over a wide range of concentrations. When the reaction rate is calculated by Eq. (2.3), molar co ...
AP Chemistry
... to substitute for [NOBr2] so we use reaction 1 (at equilibrium). k-1[NOBr2] = k1[Br2][NO]. Substituting this into the original rate law equation we get: r=(k2*k1/k-1)[Br2][NO]2. The “k” values simplify to a single k (since they are all constants), leaving us with our experimentally determined rate l ...
... to substitute for [NOBr2] so we use reaction 1 (at equilibrium). k-1[NOBr2] = k1[Br2][NO]. Substituting this into the original rate law equation we get: r=(k2*k1/k-1)[Br2][NO]2. The “k” values simplify to a single k (since they are all constants), leaving us with our experimentally determined rate l ...
NMR and Parity Violation Anomalous Temperature Dependence in
... . The temperature dependence of the 1H-MAS spectra of D-alanine from 290K to 220K were shown in Fig.1 by single pulse excitation with a delay time of 4.5 s at a spinning speed of 5 kHz with 256 scans. The results on D-alanine acquired at various temperatures imply that there exists a considerable d ...
... . The temperature dependence of the 1H-MAS spectra of D-alanine from 290K to 220K were shown in Fig.1 by single pulse excitation with a delay time of 4.5 s at a spinning speed of 5 kHz with 256 scans. The results on D-alanine acquired at various temperatures imply that there exists a considerable d ...
Different Types of Dispersions in an Optical Fiber
... Data or Video) is transmitted through a glass or plastic fiber, in the form of light. The field of applied science and engineering concerned with the design and application of optical fibers is known as fiber optics. Optical fibers are widely used in fiber optics, which permits transmission over lon ...
... Data or Video) is transmitted through a glass or plastic fiber, in the form of light. The field of applied science and engineering concerned with the design and application of optical fibers is known as fiber optics. Optical fibers are widely used in fiber optics, which permits transmission over lon ...
Variable xy-UV beam expander for high-power laser
... In Table 5b we see the variable x-beam expander needs to cover the magnification range magxBE from 3.476 to 14.865, which is wider than the y-beam expander needs to cover (a ~4.3x optical zoom). We also see that, as with the y-beam expander, the largest w0R in combined with the furthest out z0 yield ...
... In Table 5b we see the variable x-beam expander needs to cover the magnification range magxBE from 3.476 to 14.865, which is wider than the y-beam expander needs to cover (a ~4.3x optical zoom). We also see that, as with the y-beam expander, the largest w0R in combined with the furthest out z0 yield ...
Ultraviolet–visible spectroscopy
Ultraviolet–visible spectroscopy or ultraviolet-visible spectrophotometry (UV-Vis or UV/Vis) refers to absorption spectroscopy or reflectance spectroscopy in the ultraviolet-visible spectral region. This means it uses light in the visible and adjacent (near-UV and near-infrared [NIR]) ranges. The absorption or reflectance in the visible range directly affects the perceived color of the chemicals involved. In this region of the electromagnetic spectrum, molecules undergo electronic transitions. This technique is complementary to fluorescence spectroscopy, in that fluorescence deals with transitions from the excited state to the ground state, while absorption measures transitions from the ground state to the excited state.