A day in the life of a Laser scientist
... • We have demonstrated a unique laser system in which the laser output can be efficiently channelled “on-demand” into several visible wavelengths • There are many applications where the ability to get several wavelengths from a laser source is highly valued • Ophthalmology is one of these. • The inv ...
... • We have demonstrated a unique laser system in which the laser output can be efficiently channelled “on-demand” into several visible wavelengths • There are many applications where the ability to get several wavelengths from a laser source is highly valued • Ophthalmology is one of these. • The inv ...
Full text - Ward Ober Lab
... In contrast, we see that the 3D multifocal plane fundamental limit exhibits a different behavior. Here, the multifocal plane 3D fundamental limit of x0 is asymmetric about z0 = 0 and remains more or less constant for a range of defocus distances. In particular, for a given focal plane spacing ∆zf , t ...
... In contrast, we see that the 3D multifocal plane fundamental limit exhibits a different behavior. Here, the multifocal plane 3D fundamental limit of x0 is asymmetric about z0 = 0 and remains more or less constant for a range of defocus distances. In particular, for a given focal plane spacing ∆zf , t ...
Non-invasive ophthalmic imaging of adult zebrafish eye using
... Lateral scanning was done using a stepper motor. Software based on Labview was used to control the entire set-up. The free space axial and lateral resolution of the set-up were estimated to be ~ 11 and 17 µm respectively. The signal-to-noise ratio (SNR) of the set-up was measured to be ~ 100 dB. Typ ...
... Lateral scanning was done using a stepper motor. Software based on Labview was used to control the entire set-up. The free space axial and lateral resolution of the set-up were estimated to be ~ 11 and 17 µm respectively. The signal-to-noise ratio (SNR) of the set-up was measured to be ~ 100 dB. Typ ...
Fast-Fourier-domain delay line for in vivo optical coherence
... OCT imaging was not demonstrated. In all the above-mentioned devices, with the exception of the translating mirror, the optical path length through glass elements varies over the scan, causing variable group-velocity dispersion 共GVD兲, which can be detrimental to the axial resolution. This problem ca ...
... OCT imaging was not demonstrated. In all the above-mentioned devices, with the exception of the translating mirror, the optical path length through glass elements varies over the scan, causing variable group-velocity dispersion 共GVD兲, which can be detrimental to the axial resolution. This problem ca ...
Experimental Competition
... Put a semitransparent sheet of paper on the horizontal screen, which is placed close to the cup, such that the laser beam does not pass through the paper, but the reflected beam does. Observe the size and the orientation of the “image” produced by the source beam and the beam reflected from the liqu ...
... Put a semitransparent sheet of paper on the horizontal screen, which is placed close to the cup, such that the laser beam does not pass through the paper, but the reflected beam does. Observe the size and the orientation of the “image” produced by the source beam and the beam reflected from the liqu ...
Diffraction
... When the central maximum of one image falls on the first minimum of the other image, the images are said to be just resolved. For a slit with width a, the limiting angle of resolution is: min = /a. For a circular aperture of diameter D, the limiting angle of resolution is: min = 1.22(/D). ...
... When the central maximum of one image falls on the first minimum of the other image, the images are said to be just resolved. For a slit with width a, the limiting angle of resolution is: min = /a. For a circular aperture of diameter D, the limiting angle of resolution is: min = 1.22(/D). ...
9-26 Geometrical Optics
... Fermat’s principle can be used to derive the shape of a boundary that images light from one side of the boundary to another. This shape is a cartesian oval and is used for aspheric lenses Spherical lenses can well approximate the ideal shape of an aspherical lens for paraxial beams and are usually m ...
... Fermat’s principle can be used to derive the shape of a boundary that images light from one side of the boundary to another. This shape is a cartesian oval and is used for aspheric lenses Spherical lenses can well approximate the ideal shape of an aspherical lens for paraxial beams and are usually m ...
LAB LASER OPERATOR
... Act as you feel. No heroes but no panic. Afford/hold emergency means: . Knowing to act the normal equipment turn off and the emergency stop; . Knowing how to turn off the electricity, the gas; . Knowing how to use fire extinguishers, preferably CO2 (or powder) . Know and be able to act at least the ...
... Act as you feel. No heroes but no panic. Afford/hold emergency means: . Knowing to act the normal equipment turn off and the emergency stop; . Knowing how to turn off the electricity, the gas; . Knowing how to use fire extinguishers, preferably CO2 (or powder) . Know and be able to act at least the ...
Detection of Fluorescence from Single Molecules
... the sample plane. This focused light will be used for fluorescence excitation. For this alignment procedure, you will place a collimated light source and two mirrors behind the microscope, directing the light toward the microscope objective. You will coarsely align these three optical elements so th ...
... the sample plane. This focused light will be used for fluorescence excitation. For this alignment procedure, you will place a collimated light source and two mirrors behind the microscope, directing the light toward the microscope objective. You will coarsely align these three optical elements so th ...
4F system 4F system with defocused input 4F system with defocused
... “M” : image blurred by diffraction only center and rightmost “M”s : image blurred by diffraction and defocus ...
... “M” : image blurred by diffraction only center and rightmost “M”s : image blurred by diffraction and defocus ...
FTIR Instrumentation
... Dispersive spectrophotometers, which use a monochromator to produce an infrared spectrum one resolution element at a time. Michelson interferometers, which use a moving mirror to create an interference pattern, or interferogram, from which all resolution elements are determined simultaneously. ...
... Dispersive spectrophotometers, which use a monochromator to produce an infrared spectrum one resolution element at a time. Michelson interferometers, which use a moving mirror to create an interference pattern, or interferogram, from which all resolution elements are determined simultaneously. ...
Tapered Fiber Fabrication
... one lens, the focal length would be too short to provide enough useful working distance. Instead, a series of three lenses was used to avoid this problem. The first two acted as a beam expander and collimator, and the last one focused down the beam. In order to use the THORLABS ZnSe lenses designed ...
... one lens, the focal length would be too short to provide enough useful working distance. Instead, a series of three lenses was used to avoid this problem. The first two acted as a beam expander and collimator, and the last one focused down the beam. In order to use the THORLABS ZnSe lenses designed ...
Counting Airborne Bacteria in Real Time
... flexibly (emitted light wavelength corresponds to a coupled light wavelength), metabolic organisms are disclosed by means of an additional fluorescent signal. For this reason, flow cytometry represents a completely viable analysis technique to determine the bacterial count. Due to its principle, liq ...
... flexibly (emitted light wavelength corresponds to a coupled light wavelength), metabolic organisms are disclosed by means of an additional fluorescent signal. For this reason, flow cytometry represents a completely viable analysis technique to determine the bacterial count. Due to its principle, liq ...
Immersion microscopy based on photonic crystal materials
... of the SPP group velocity may be either positive or negative in the vicinity of the surface plasmon resonance frequency, and the SPP dispersion appears to be almost flat in this region. As we have shown above, the latter circumstance is necessary for high resolution imaging applications. On the othe ...
... of the SPP group velocity may be either positive or negative in the vicinity of the surface plasmon resonance frequency, and the SPP dispersion appears to be almost flat in this region. As we have shown above, the latter circumstance is necessary for high resolution imaging applications. On the othe ...
Investigating Bacterial Pathogen-host Interaction by Using Scanning
... cultured cells or animal models. The TEM and SEM are particularly useful in studying morphologic changes of cell and tissue structures before and after bacterial infection. Intestinal epithelial cells linked by tight junction forms a physical barrier that protects against invasion of nonpathogenic b ...
... cultured cells or animal models. The TEM and SEM are particularly useful in studying morphologic changes of cell and tissue structures before and after bacterial infection. Intestinal epithelial cells linked by tight junction forms a physical barrier that protects against invasion of nonpathogenic b ...
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... signal produced is proportional to the squared root of the optical ref lectance, the quantity of interest in our backscattering geometry. The interference signal is the dot product of the optical fields returning from the reference and the test arms, and, although the source sends an unpolarized sig ...
... signal produced is proportional to the squared root of the optical ref lectance, the quantity of interest in our backscattering geometry. The interference signal is the dot product of the optical fields returning from the reference and the test arms, and, although the source sends an unpolarized sig ...
Laser Systems for Inverse Compton Scattering Gamma
... specificity. Thus standoff detection of SNM would greatly benefit from the use of active, nuclear-specific interrogation techniques. One approach is to use highly penetrating gamma-rays (>6 MeV) to produce photofission in SNM, resulting in prompt fission gammarays and/or neutrons. What is needed mos ...
... specificity. Thus standoff detection of SNM would greatly benefit from the use of active, nuclear-specific interrogation techniques. One approach is to use highly penetrating gamma-rays (>6 MeV) to produce photofission in SNM, resulting in prompt fission gammarays and/or neutrons. What is needed mos ...
EELS
... ‣One can show that the EELS is a very good approximation of the EMLD ‣EMLDOS is a very concise description of optical excitations ‣The EELS is a map of the plasmons “eigenfunction” (with some marks... ‣The STEM-EELS is a decent plasmonic counterpart of the STM for ...
... ‣One can show that the EELS is a very good approximation of the EMLD ‣EMLDOS is a very concise description of optical excitations ‣The EELS is a map of the plasmons “eigenfunction” (with some marks... ‣The STEM-EELS is a decent plasmonic counterpart of the STM for ...
ETM4106Tutorial3
... Q.1 The optical power launched into an 8 km length fiber is 120 W, while at the output power is reduced to 3 W. Determine: (a) the signal loss in dB through the fiber (b) signal attenuation per km for the fiber (c) the signal attenuation for a 10km optical link using the same fiber with splices ...
... Q.1 The optical power launched into an 8 km length fiber is 120 W, while at the output power is reduced to 3 W. Determine: (a) the signal loss in dB through the fiber (b) signal attenuation per km for the fiber (c) the signal attenuation for a 10km optical link using the same fiber with splices ...
Optical gratings: Nano-engineered lenses - MiNa
... of the grating mirror, dynamic focusing may also be achievable in the future. A remarkable property of SWGs is that they can be designed to function as highly reflective mirrors (>99%), but are much thinner than multilayer films (hundreds of nanometres versus several micrometres)4. Such gratings are ...
... of the grating mirror, dynamic focusing may also be achievable in the future. A remarkable property of SWGs is that they can be designed to function as highly reflective mirrors (>99%), but are much thinner than multilayer films (hundreds of nanometres versus several micrometres)4. Such gratings are ...
769_2006_146_MOESEM1_ESM
... Virtual slide. Mirax scan, blood smear (20x objective), highest possible resolution but not sufficient for the detection of fine granular intracellular components ...
... Virtual slide. Mirax scan, blood smear (20x objective), highest possible resolution but not sufficient for the detection of fine granular intracellular components ...
Counting and imaging bacteria using
... The topography of a surface is measured by monitoring the deflection of the tip (using a laser) as it is pulled across a surface. ...
... The topography of a surface is measured by monitoring the deflection of the tip (using a laser) as it is pulled across a surface. ...
Fabrication of back contacts using laser writer and photolithography
... mask in this study. Exposure wavelength of 405 nm was used, with which 1.2 μm feature size can be written in direct write-mode over the soda lime glass plate. The advantage of using the fabricated mask is that it can be used to design back contacts for thin film Photovoltaic (PV) solar cells. To inv ...
... mask in this study. Exposure wavelength of 405 nm was used, with which 1.2 μm feature size can be written in direct write-mode over the soda lime glass plate. The advantage of using the fabricated mask is that it can be used to design back contacts for thin film Photovoltaic (PV) solar cells. To inv ...
Siggraph Asia Technical Brief
... packaging and color holograms. A desktop enclosure for the device would make it easier to use. It would allow the user to quickly glance at the holograms and opens the possibility for interaction. The enclosure could include a lens and aperture for projection which would produce a larger hologram im ...
... packaging and color holograms. A desktop enclosure for the device would make it easier to use. It would allow the user to quickly glance at the holograms and opens the possibility for interaction. The enclosure could include a lens and aperture for projection which would produce a larger hologram im ...
Confocal microscopy
Confocal microscopy is an optical imaging technique for increasing optical resolution and contrast of a micrograph by means of adding a spatial pinhole placed at the confocal plane of the lens to eliminate out-of-focus light. It enables the reconstruction of three-dimensional structures from the obtained images. This technique has gained popularity in the scientific and industrial communities and typical applications are in life sciences, semiconductor inspection and materials science.