Adaptive optics scanning laser ophthalmoscope for stabilized retinal
... including adaptive filtering and tracking scaled to the AOSLO image feature size may be implemented for improved tracking precision. These will be discussed in more detail in Section 5. 2.3 Optical setup The optical setup for the TAOSLO is shown in Fig. 2. We developed a novel optical arrangement wi ...
... including adaptive filtering and tracking scaled to the AOSLO image feature size may be implemented for improved tracking precision. These will be discussed in more detail in Section 5. 2.3 Optical setup The optical setup for the TAOSLO is shown in Fig. 2. We developed a novel optical arrangement wi ...
Surface Plasmon Interference Nanolithography
... agreements between theoretical calculations and the simulation results suggest the validity of the simulations. Next, we consider the surface plasmon interference. When two counter propagating surface plasmon waves meet, interference fringes are formed. The periodicity d of the interference fringes ...
... agreements between theoretical calculations and the simulation results suggest the validity of the simulations. Next, we consider the surface plasmon interference. When two counter propagating surface plasmon waves meet, interference fringes are formed. The periodicity d of the interference fringes ...
Laser III - Universiti Sains Malaysia
... For significant gain, a high current density is necessary. The onset of lasing is characterised by the a specific injection current known as the Threshold Current Since the simple homojunction laser has high threshold current, it is considered not efficient. The onset of laser action at the threshol ...
... For significant gain, a high current density is necessary. The onset of lasing is characterised by the a specific injection current known as the Threshold Current Since the simple homojunction laser has high threshold current, it is considered not efficient. The onset of laser action at the threshol ...
lab sheet - Faculty of Engineering
... sometimes found around the edges of clouds or coronas surrounding the sun or moon. The illustration above shows how light (from either the sun or the moon) is bent around small droplets in the cloud. Optical effects resulting from diffraction are produced through the interference of light waves. To ...
... sometimes found around the edges of clouds or coronas surrounding the sun or moon. The illustration above shows how light (from either the sun or the moon) is bent around small droplets in the cloud. Optical effects resulting from diffraction are produced through the interference of light waves. To ...
Scanning Electron Microscope - i-Explore International Research
... cells (nucleus, mitochondria...etc.).This required 10,000x plus magnification which was not possible using current optical microscopes. Electron microscopes are capable of much higher magnifications and have a greater resolving power than a light microscope, allowing it to see much smaller objects i ...
... cells (nucleus, mitochondria...etc.).This required 10,000x plus magnification which was not possible using current optical microscopes. Electron microscopes are capable of much higher magnifications and have a greater resolving power than a light microscope, allowing it to see much smaller objects i ...
A Coaxial Optical Scanner for Synchronous Acquisition of 3D
... properties of the device and the difficulty of applying it near highfrequency variation in the reflectance such as edges in the material albedo [Guillemaut et al. 2004]. Third and finally, unlike many designs, our use of coaxial devices and descattering allows measuring surface backscattering, which ...
... properties of the device and the difficulty of applying it near highfrequency variation in the reflectance such as edges in the material albedo [Guillemaut et al. 2004]. Third and finally, unlike many designs, our use of coaxial devices and descattering allows measuring surface backscattering, which ...
Tunable External-Cavity High
... – Displacement of a particular diode from the mean position of the array of diodes. – Causes linewidth broadening due to how the way light is fedback into the diode. – We want “smile” to be as little as possible. ...
... – Displacement of a particular diode from the mean position of the array of diodes. – Causes linewidth broadening due to how the way light is fedback into the diode. – We want “smile” to be as little as possible. ...
Lab 14 - FIber Optics Principles and Position Sensor
... Using a large area photodetector, measure the power of the He-Ne laser. Before proceeding make sure that the detector is linear. For this lab, the absolute power of the laser is not important. You can use "Photodetector Voltage" as a measure of the detected power. Using a large core (about 1mm) fibe ...
... Using a large area photodetector, measure the power of the He-Ne laser. Before proceeding make sure that the detector is linear. For this lab, the absolute power of the laser is not important. You can use "Photodetector Voltage" as a measure of the detected power. Using a large core (about 1mm) fibe ...
Advanced Applications
... prism). The dispersion-like curve generated from the difference between the two signals (as shown in the graph to the right), provides an error signal for the frequency lock. The quarter-wave plate placed after the vapor cell can be rotated so as to alter the intensities of each component as well as ...
... prism). The dispersion-like curve generated from the difference between the two signals (as shown in the graph to the right), provides an error signal for the frequency lock. The quarter-wave plate placed after the vapor cell can be rotated so as to alter the intensities of each component as well as ...
software development life cycle
... The work towards a silicon-based emitter is ongoing but still far from nature. Until an efficient, reliable silicon based light source is available, a photonic integrated system will need to use a conventional III-V material light emitter. ...
... The work towards a silicon-based emitter is ongoing but still far from nature. Until an efficient, reliable silicon based light source is available, a photonic integrated system will need to use a conventional III-V material light emitter. ...
In vivo confocal imaging of the retina in animal models using
... conglomerate –presumably a remnant of the regressed vitreous vasculature– is found in mice (May & Lutjen-Drecoll, 2002), which blocks the light path and thus imposes as a dark structure (Figs. 3A, B, black arrowhead). As the infrared light is much less affected by the presence of melanin, the ICG ima ...
... conglomerate –presumably a remnant of the regressed vitreous vasculature– is found in mice (May & Lutjen-Drecoll, 2002), which blocks the light path and thus imposes as a dark structure (Figs. 3A, B, black arrowhead). As the infrared light is much less affected by the presence of melanin, the ICG ima ...
Structural, optical, and electronic properties of magnetron
... of a to lower wave numbers. This rather metallic behavior applies to all oxide compositions within the oxidation state regime 1,x,2. It clearly contradicts the observed thermally activated transport, and associated negative thermal resistance coefficient, scaling as 2E 0 /kT 2 . The present Pt–O sys ...
... of a to lower wave numbers. This rather metallic behavior applies to all oxide compositions within the oxidation state regime 1,x,2. It clearly contradicts the observed thermally activated transport, and associated negative thermal resistance coefficient, scaling as 2E 0 /kT 2 . The present Pt–O sys ...
Bright Field Microscopy
... •Other specimens do not absorb light and are referred to as phase objects. Because the human eye can only detect intensity and color differences, the phase changes due to objects must be converted to intensity differences. •The phase contrast microscope is designed to take advantage of phase differe ...
... •Other specimens do not absorb light and are referred to as phase objects. Because the human eye can only detect intensity and color differences, the phase changes due to objects must be converted to intensity differences. •The phase contrast microscope is designed to take advantage of phase differe ...
Unit 1.6 Optical Switching - DIT School of Electronics and
... The operation of acousto-optic switches is based on the acousto-optic effect, i.e., the interaction between sound and light. The principle of operation of a polarization-insensitive acousto-optic switch is as follows. First, the input signal is split into its two polarized components (TE and TM) by ...
... The operation of acousto-optic switches is based on the acousto-optic effect, i.e., the interaction between sound and light. The principle of operation of a polarization-insensitive acousto-optic switch is as follows. First, the input signal is split into its two polarized components (TE and TM) by ...
Conference title, upper and lower case, bolded, 18 point type
... that has high transmission in the visible wavelength region is indium tin oxide (ITO). However, this material’s transmission rapidly diminishes in the IR and the sheet resistance is typically limited to several ohms per square for sufficient transparency. A metalized grid has greater flexibility. Th ...
... that has high transmission in the visible wavelength region is indium tin oxide (ITO). However, this material’s transmission rapidly diminishes in the IR and the sheet resistance is typically limited to several ohms per square for sufficient transparency. A metalized grid has greater flexibility. Th ...
Improved modeling of grid structures on optics: transmission, sheet
... that has high transmission in the visible wavelength region is indium tin oxide (ITO). However, this material’s transmission rapidly diminishes in the IR and the sheet resistance is typically limited to several ohms per square for sufficient transparency. A metalized grid has greater flexibility. Th ...
... that has high transmission in the visible wavelength region is indium tin oxide (ITO). However, this material’s transmission rapidly diminishes in the IR and the sheet resistance is typically limited to several ohms per square for sufficient transparency. A metalized grid has greater flexibility. Th ...
Slide 1
... signal. From logical information, like the digital bit stream, pulse shape, coding type, modulation type, and bit rate, a copy of the initially sent signal is built. The time delay is calculated from the cross correlation of the incoming electrical signal and the internally regenerated original sign ...
... signal. From logical information, like the digital bit stream, pulse shape, coding type, modulation type, and bit rate, a copy of the initially sent signal is built. The time delay is calculated from the cross correlation of the incoming electrical signal and the internally regenerated original sign ...
Review Article Nanostructures for Enhanced Light Absorption in
... through thermal conversion. However, it is worth noting that a new mechanism, photon-enhanced thermionic emission, which combines electric as well as thermal conversion mechanisms, is now shown to lead to enhanced conversion efficiencies that potentially could even exceed the theoretical limits of con ...
... through thermal conversion. However, it is worth noting that a new mechanism, photon-enhanced thermionic emission, which combines electric as well as thermal conversion mechanisms, is now shown to lead to enhanced conversion efficiencies that potentially could even exceed the theoretical limits of con ...
ph104exp09_Physical_Optics_03
... Holding the double razor blade between your middle finger and thumb, with your fore finger pressing down on top (the dull part), draw a line on the photographic plate parallel to one edge and about 0.5 cm in from one edge. Look at it with a magnifier to see if there is a clean double line scratched ...
... Holding the double razor blade between your middle finger and thumb, with your fore finger pressing down on top (the dull part), draw a line on the photographic plate parallel to one edge and about 0.5 cm in from one edge. Look at it with a magnifier to see if there is a clean double line scratched ...
Downhole Optical Analysis of Formation Fluids- Disk 2
... If particles mix with fluids—as in drilling mud—or if oil and water emulsify, then light will be scattered. This causes additional reduction in transmitted light. If the scattering contribution to optical density is large, the water and oil peaks may be obscured and difficult to interpret. In this c ...
... If particles mix with fluids—as in drilling mud—or if oil and water emulsify, then light will be scattered. This causes additional reduction in transmitted light. If the scattering contribution to optical density is large, the water and oil peaks may be obscured and difficult to interpret. In this c ...
Brownian motion of a colloidal particle immersed in a polymeric
... By using three-dimensional digital video microscopy (DVM-3D), we study the displacement of a Brownian particle immersed in a polymeric solution located near a rigid wall. The technique takes advantage of the diffraction pattern generated by a fluorescent particle that is found below the focal plane ...
... By using three-dimensional digital video microscopy (DVM-3D), we study the displacement of a Brownian particle immersed in a polymeric solution located near a rigid wall. The technique takes advantage of the diffraction pattern generated by a fluorescent particle that is found below the focal plane ...
Laser Refraction and Diffraction
... A. Measurement of the refractive index of a glass plate 1. Use Fig. 1 to calculate the refractive index of a glass plate. 2. Illuminate the glass plate with a laser beam at a predetermined incident angle. 3. Mark the following spots: ☉ The “spot of output” at the output of the laser. ☉ The “spot of ...
... A. Measurement of the refractive index of a glass plate 1. Use Fig. 1 to calculate the refractive index of a glass plate. 2. Illuminate the glass plate with a laser beam at a predetermined incident angle. 3. Mark the following spots: ☉ The “spot of output” at the output of the laser. ☉ The “spot of ...
Imaging with complex ray-optical refractive
... A number of METATOYs performing various forbidden light-ray-direction changes have been investigated theoretically [3–10]. So far, METATOYs performing three different light-ray-direction changes have been demonstrated experimentally: namely, flipping of one transverse ray-direction component [11], r ...
... A number of METATOYs performing various forbidden light-ray-direction changes have been investigated theoretically [3–10]. So far, METATOYs performing three different light-ray-direction changes have been demonstrated experimentally: namely, flipping of one transverse ray-direction component [11], r ...
Imaging optical singularities; Understanding the duality of C-points and optical vortices
... imaging field or inhomogeneities in the medium through which the light is traveling. In this article we investigate the imaging aspect of vortices further, by converting the optical vortex into a polarization-singularity C-point, and then diagnosing the light field using imaging polarimetry. The adv ...
... imaging field or inhomogeneities in the medium through which the light is traveling. In this article we investigate the imaging aspect of vortices further, by converting the optical vortex into a polarization-singularity C-point, and then diagnosing the light field using imaging polarimetry. The adv ...
All-dielectric subwavelength metasurface focusing lens
... manufactured with relaxed tolerance, compared to precision diffractive structures. The objective was to create a sub-wavelength, fine-patterned meta-surface as a phase mask with a smooth radial dependence of phase increment on transmission, avoiding 2π phase steps. Quasi-parabolic radial gradients o ...
... manufactured with relaxed tolerance, compared to precision diffractive structures. The objective was to create a sub-wavelength, fine-patterned meta-surface as a phase mask with a smooth radial dependence of phase increment on transmission, avoiding 2π phase steps. Quasi-parabolic radial gradients o ...
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.