Sum frequency generation spectroscopy (SFG)
... The non-resonating contribution is assumed to be from electronic responses. Although this contribution has often been considered to be constant over the spectrum, because it is generated simultaneously with the resonant response, the two responses must compete for intensity. This competition shapes ...
... The non-resonating contribution is assumed to be from electronic responses. Although this contribution has often been considered to be constant over the spectrum, because it is generated simultaneously with the resonant response, the two responses must compete for intensity. This competition shapes ...
EXPERIMENTAL TECHNIQUES
... were gold-sputtered with a Bal-Tec SCD004 sputterer. Both the microscope and the sputterer are available at the Servei de Recursos Científics of the Rovira i Virgili University. 2.4.3. Atomic Force Microscopy (AFM). The Atomic Force Microscope (AFM) is one of about two dozen types of scanned-proximi ...
... were gold-sputtered with a Bal-Tec SCD004 sputterer. Both the microscope and the sputterer are available at the Servei de Recursos Científics of the Rovira i Virgili University. 2.4.3. Atomic Force Microscopy (AFM). The Atomic Force Microscope (AFM) is one of about two dozen types of scanned-proximi ...
Paper
... The Letter by Deng et al. [1] presents an analytic theoretical description of matter-wave superradiance [2] which claims to go beyond previous theoretical frameworks. I show here that the theory presented in this Letter is not a description of superradiance per se, but rather an elegant perturbative ...
... The Letter by Deng et al. [1] presents an analytic theoretical description of matter-wave superradiance [2] which claims to go beyond previous theoretical frameworks. I show here that the theory presented in this Letter is not a description of superradiance per se, but rather an elegant perturbative ...
(full text)
... Inexpensive 405 nm diode lasers do have some limitations that need to be addressed in order to improve the system performance. Generally, they are multimode, and as a result exhibit poor spatial and temporal coherences. Also, the output power from these inexpensive 405 nm laser diodes is not control ...
... Inexpensive 405 nm diode lasers do have some limitations that need to be addressed in order to improve the system performance. Generally, they are multimode, and as a result exhibit poor spatial and temporal coherences. Also, the output power from these inexpensive 405 nm laser diodes is not control ...
Medical Laboratory Instrumentation 2010
... UV regions of the spectrum. • The wavelength ranges transmitted are much smaller than for absorption filters, generally 1–10 nm, and the amount of light transmitted is generally higher than for absorption filters. ...
... UV regions of the spectrum. • The wavelength ranges transmitted are much smaller than for absorption filters, generally 1–10 nm, and the amount of light transmitted is generally higher than for absorption filters. ...
Assembly, Alignment, and Maintenance of an Automated Laser Cutter
... The laser cutter is connected to a computer, which has design software installed for driving the laser cutter. To a user, the process is transparent: you can download pictures from any source, paste them into the software and carve out these patterns with the laser cutter. However, we wish particula ...
... The laser cutter is connected to a computer, which has design software installed for driving the laser cutter. To a user, the process is transparent: you can download pictures from any source, paste them into the software and carve out these patterns with the laser cutter. However, we wish particula ...
PPT Version - OMICS International
... 2007. Before that he has worked on terahertz-related technology for many years, first as a Research Associate at the Cavendish Laboratory, University of Cambridge, and then as a Senior Scientist at TeraView Limited, Cambridge. He has been awarded 6 patents, published 3 book chapters and over 100 pee ...
... 2007. Before that he has worked on terahertz-related technology for many years, first as a Research Associate at the Cavendish Laboratory, University of Cambridge, and then as a Senior Scientist at TeraView Limited, Cambridge. He has been awarded 6 patents, published 3 book chapters and over 100 pee ...
laser2-broadening
... spectroscopy. Narrow lines are highly desirable for both absorption and emission because they reduce the possibility of interference due to overlapping spectra. The line width ½ of an atomic absorption or emission line is defined as its width in wavelength units when measured at one half the ...
... spectroscopy. Narrow lines are highly desirable for both absorption and emission because they reduce the possibility of interference due to overlapping spectra. The line width ½ of an atomic absorption or emission line is defined as its width in wavelength units when measured at one half the ...
1. dia - Budapest University of Technology and Economics
... előfordulhatnak bennük, amelyekkel a tantárgy oktatói nem teljesen értenek egyet. ...
... előfordulhatnak bennük, amelyekkel a tantárgy oktatói nem teljesen értenek egyet. ...
Journal of Applied Science and Agriculture
... Distributed optical sensors are based on one of the three Reflectometry methods: Optical Time Domain Reflectometry (OTDR), Optical Low Coherence Reflectometry (OLCR) and Optical Frequency Domain Reflectometry (OFDR). OTDR is often used in systems with long length and has low spatial resolution. OLCR ...
... Distributed optical sensors are based on one of the three Reflectometry methods: Optical Time Domain Reflectometry (OTDR), Optical Low Coherence Reflectometry (OLCR) and Optical Frequency Domain Reflectometry (OFDR). OTDR is often used in systems with long length and has low spatial resolution. OLCR ...
Aeroengine exhaust emissions monitoring
... Figure 1 Gas turbine engine exhaust emissions point measurement probe. Non-intrusive optical spectroscopic gas emissions monitoring techniques have the advantages of low operational costs and ease and speed of implementation. In particular FTIR spectroscopy has the advantage of being in principle ab ...
... Figure 1 Gas turbine engine exhaust emissions point measurement probe. Non-intrusive optical spectroscopic gas emissions monitoring techniques have the advantages of low operational costs and ease and speed of implementation. In particular FTIR spectroscopy has the advantage of being in principle ab ...
Coherent light sources and optical techniques for Thomson
... At the same time, I’m studying possible future upgrades to increase the TS process efficiency and new single shot optical-based diagnostics measurements on electrons. In detail, my activities in this direction can be summarized as follows: 1. Study of laser beam propagation in a capillary. A capilla ...
... At the same time, I’m studying possible future upgrades to increase the TS process efficiency and new single shot optical-based diagnostics measurements on electrons. In detail, my activities in this direction can be summarized as follows: 1. Study of laser beam propagation in a capillary. A capilla ...
Experiment results
... mechanical vibrations. Since the measurement errors caused by the vibrations are small, the phase shift due to a plasma less than one fringe would be acceptable. Then the DI is principally free from the fringe jump error by selecting the short wavelength of the laser because the electron density can ...
... mechanical vibrations. Since the measurement errors caused by the vibrations are small, the phase shift due to a plasma less than one fringe would be acceptable. Then the DI is principally free from the fringe jump error by selecting the short wavelength of the laser because the electron density can ...
РЕФЕРАТ
... COHERENT SPECTRUM ANALYZER WITH MATRIX DETECTOR Object of study is the process of converting the light field in the coherent optical spectrum analyzers by performing spatial Fourier transform of the test signal. The subject of the study is the generalized characteristics of the coherent spectrum ana ...
... COHERENT SPECTRUM ANALYZER WITH MATRIX DETECTOR Object of study is the process of converting the light field in the coherent optical spectrum analyzers by performing spatial Fourier transform of the test signal. The subject of the study is the generalized characteristics of the coherent spectrum ana ...
Review of paper entitled “Athermalization of optical instruments from
... impacts from radial gradients. To reduce thermal gradients, it is important to select materials that can absorb large amounts of heat with small resulting temperature rise, and conduct this heat away rapidly. Glasses: Most glasses have values in the range of 5 to 25x10-6 which will result in a lar ...
... impacts from radial gradients. To reduce thermal gradients, it is important to select materials that can absorb large amounts of heat with small resulting temperature rise, and conduct this heat away rapidly. Glasses: Most glasses have values in the range of 5 to 25x10-6 which will result in a lar ...
The Spectrophotometer
... Electron excitation from the lower to higher energy states is the cause of the absorption of energy when dealing with the portion of the electromagnetic radiation used in these machines. Since we are using ions in solution, not isolated atoms, the absorption observed is a broad band pattern rather t ...
... Electron excitation from the lower to higher energy states is the cause of the absorption of energy when dealing with the portion of the electromagnetic radiation used in these machines. Since we are using ions in solution, not isolated atoms, the absorption observed is a broad band pattern rather t ...
Laser Distance and Speed Detection
... 2. Accuracy of the phase-measurement loop. This depends on signal strength, noise, and so on. 3. Stability of the modulation oscillator. 4. Number of cycles (or measurements) that can be averaged together for a range. measurement. 5. Turbulence in the air through which the. measurement is made. 6. V ...
... 2. Accuracy of the phase-measurement loop. This depends on signal strength, noise, and so on. 3. Stability of the modulation oscillator. 4. Number of cycles (or measurements) that can be averaged together for a range. measurement. 5. Turbulence in the air through which the. measurement is made. 6. V ...
THERMAL VIA AND THERMAL TRENCH: GROWING ON DIAMOND
... Integrated circuits (ICs) are becoming more complex, requiring the supply of large amounts of power, and the dissipation of large amounts of heat. Traditionally, heat dissipation has been handled by convection technologies, such as fans, liquid cooling and heat pipes, or conduction methods that use ...
... Integrated circuits (ICs) are becoming more complex, requiring the supply of large amounts of power, and the dissipation of large amounts of heat. Traditionally, heat dissipation has been handled by convection technologies, such as fans, liquid cooling and heat pipes, or conduction methods that use ...
Mercury in a box – in the Planetary Emissivity Laboratory (PEL) at
... measurement of the emissivity of Mercury-analogue materials at grain sizes smaller than 25 μm and at temperatures of more than 400°C, typical for Mercury's low-latitude dayside. The PEL development follows a multi-step approach. We have already obtained emissivity data at mid-infrared wavelengths th ...
... measurement of the emissivity of Mercury-analogue materials at grain sizes smaller than 25 μm and at temperatures of more than 400°C, typical for Mercury's low-latitude dayside. The PEL development follows a multi-step approach. We have already obtained emissivity data at mid-infrared wavelengths th ...
Non-destructive terahertz imaging of illicit drugs using spectral
... since last year in the THz-wave region. The absence of non-destructive inspection technique for illicit drugs hidden in mail envelopes has resulted in such drugs being not only smuggled across international borders but also transported from one jurisdiction to another within a country with surprisin ...
... since last year in the THz-wave region. The absence of non-destructive inspection technique for illicit drugs hidden in mail envelopes has resulted in such drugs being not only smuggled across international borders but also transported from one jurisdiction to another within a country with surprisin ...
Conroy2005-SurfaceMetrology.pdf
... that its axis is coincident with the pivot axis. Directing a laser beam at normal incidence onto this grating then generates two first order diffraction beams; any movement of the stylus about the pivot is transferred to a rotation of the grating. This in turn Doppler-frequency shifts the emerging d ...
... that its axis is coincident with the pivot axis. Directing a laser beam at normal incidence onto this grating then generates two first order diffraction beams; any movement of the stylus about the pivot is transferred to a rotation of the grating. This in turn Doppler-frequency shifts the emerging d ...
G070376-00
... housing parts are connected via D-Sub connectors. Two pins per electrode and short, sturdy copper wires are used to keep the capacitance of the electrodes low. The use of a separate electronics housing allows one to tune or change the resonant frequencies without affecting the alignment of the modul ...
... housing parts are connected via D-Sub connectors. Two pins per electrode and short, sturdy copper wires are used to keep the capacitance of the electrodes low. The use of a separate electronics housing allows one to tune or change the resonant frequencies without affecting the alignment of the modul ...
4) Spectroscopies Involving Energy Exchange
... (1) Fluorescence: Emission of a photon when the analyte returns to a lower-energy state with the same spin as the higher energy state, i.e., S1→S0, in which the electron life time in the excited state is ~10–5–10–8 s. (2) Phosphorescence: Emission of a photon when the analyte returns to a lower-ener ...
... (1) Fluorescence: Emission of a photon when the analyte returns to a lower-energy state with the same spin as the higher energy state, i.e., S1→S0, in which the electron life time in the excited state is ~10–5–10–8 s. (2) Phosphorescence: Emission of a photon when the analyte returns to a lower-ener ...
Provedení, principy činnosti a základy výpočtu pro výměníky tepla
... 3D laser scanner shines a laser on the subject and exploits a camera to look for the location of the laser dot. Depending on how far away the laser strikes a surface, the laser dot appears at different places in the camera’s field of view. This technique is called triangulation because the laser dot ...
... 3D laser scanner shines a laser on the subject and exploits a camera to look for the location of the laser dot. Depending on how far away the laser strikes a surface, the laser dot appears at different places in the camera’s field of view. This technique is called triangulation because the laser dot ...
AFM-IR
AFM-IR refers to atomic force microscope (AFM) based infrared (IR) spectroscopy. AFM-IR is a technique for chemical analysis of samples at nanoscale spatial resolution. AFM-IR is related to techniques including Tip-Enhanced Raman Spectroscopy (TERS) and scanning near-field optical microscopy (SNOM) and other methods of vibrational analysis with scanning probe microscopy. The AFM-IR technique uses a sharp tip of an AFM probe to measure the absorption of infrared light by a sample. Recording the amount of IR absorption as a function of wavelength or wavenumber creates nanoscale IR absorption spectra, which can be used to chemically characterize and even identify unknown materials. Recording the IR absorption as a function of position can be used to create chemical composition maps that show the spatial distribution of different chemical components. AFM-IR can overcome the diffraction limit that limits the spatial resolution of conventional infrared microscopy and microspectroscopy to the scale of several microns. AFM-IR can achieve spatial resolution down to around 20 nm, limited in some case only by the sharpness of the AFM probe tip and sensitivity down to the scale of molecular monolayers.