Haemorrhagic Conjunctival Retention Cyst
... A 48-year-old male patient was admitted to our clinic with complaints of mild stinging in his right eye. In his examination, best-corrected visual acuity was 1.0 in the right eye with a correction of −0.50, and was 1.0 in the left eye with a correction of −0.25. In the biomicroscopic examination, th ...
... A 48-year-old male patient was admitted to our clinic with complaints of mild stinging in his right eye. In his examination, best-corrected visual acuity was 1.0 in the right eye with a correction of −0.50, and was 1.0 in the left eye with a correction of −0.25. In the biomicroscopic examination, th ...
BioE 123 Teaching Material Stanford University
... What is light? Fast review of physics here: Light has characteristics of particles and waves, but we are more concerned with the wave-like properties of light when we think about optics. Light doesn’t stop when it reaches ends of media (liquids, gasses, solids) but reflects, diffracts, and refracts. ...
... What is light? Fast review of physics here: Light has characteristics of particles and waves, but we are more concerned with the wave-like properties of light when we think about optics. Light doesn’t stop when it reaches ends of media (liquids, gasses, solids) but reflects, diffracts, and refracts. ...
Development of a simulator of a satellite-to
... FIG. 2. 共a兲 Optical layout of SSI for satellite gravity mission and 共b兲 conceptual design of ground-based simulator for SSI. This apparatus simulates the laser Doppler frequency shift, optical path-length difference, and differential light power. E: light field, V: voltage, u共t兲: velocity, L: interf ...
... FIG. 2. 共a兲 Optical layout of SSI for satellite gravity mission and 共b兲 conceptual design of ground-based simulator for SSI. This apparatus simulates the laser Doppler frequency shift, optical path-length difference, and differential light power. E: light field, V: voltage, u共t兲: velocity, L: interf ...
24.1 - 24.4
... The conditions are valid if the medium above the top surface is the same as the medium below the bottom surface If the thin film is between two different media, one of lower index than the film and one of higher index, the conditions for constructive and destructive interference are reversed ...
... The conditions are valid if the medium above the top surface is the same as the medium below the bottom surface If the thin film is between two different media, one of lower index than the film and one of higher index, the conditions for constructive and destructive interference are reversed ...
——— Our CVD diamond has an extremely broad
... Element Six optical CVD diamond components are available with optical quality finishes in sizes up to Ø 135 mm in diameter and up to 3 mm thickness (polycrystalline optical grades) and as plates of up to 8 x 8 x 2 mm (single crystal CVD diamond). They can also be processed to virtually any shape. ...
... Element Six optical CVD diamond components are available with optical quality finishes in sizes up to Ø 135 mm in diameter and up to 3 mm thickness (polycrystalline optical grades) and as plates of up to 8 x 8 x 2 mm (single crystal CVD diamond). They can also be processed to virtually any shape. ...
2 Modeling and Design of Lens Systems
... Sketch: Imaging with a stop at F’ symmetrical cone around the ray parallel to the optical axis! this is true for each object point! Property: object side telecentric This property of the optical system is useful e.g. for measurement tasks: if the image plane is fixed at the position O’ a cha ...
... Sketch: Imaging with a stop at F’ symmetrical cone around the ray parallel to the optical axis! this is true for each object point! Property: object side telecentric This property of the optical system is useful e.g. for measurement tasks: if the image plane is fixed at the position O’ a cha ...
Translation-invariant object recognition system using an optical correlator and a super-
... developed by Laser Photonics Technology Inc.10 as the medium for a high-capacity and high-efficiency holographic memory. This material can have a large M / # 共⬎20兲, and holograms written in this material can survive at room temperature for many years without noticeable degradation.11,12 There are se ...
... developed by Laser Photonics Technology Inc.10 as the medium for a high-capacity and high-efficiency holographic memory. This material can have a large M / # 共⬎20兲, and holograms written in this material can survive at room temperature for many years without noticeable degradation.11,12 There are se ...
1 - High Point University
... 7) Move the source such that the light ray coming from the source strikes the center of the mirror (the point where it intersects the optical axis). You can measure the angle of the light rays by using the angle tool. To use it, simply click on the black background, hold the button down, and move th ...
... 7) Move the source such that the light ray coming from the source strikes the center of the mirror (the point where it intersects the optical axis). You can measure the angle of the light rays by using the angle tool. To use it, simply click on the black background, hold the button down, and move th ...
A high numerical aperture (NA = 0.92)
... almost 1/3 of the full solid angle, which results in a resolution of 460 nm. The design of the objective lens has been optimized to increase its working distance vanishing for a solid immersion objective lens [20] to 150 µm, which is sufficiently long to form a two-dimensional optical lattice of cou ...
... almost 1/3 of the full solid angle, which results in a resolution of 460 nm. The design of the objective lens has been optimized to increase its working distance vanishing for a solid immersion objective lens [20] to 150 µm, which is sufficiently long to form a two-dimensional optical lattice of cou ...
502-22 Illumination Systems
... Critical illumination images the light source directly onto the object. While very light efficient, critical illumination is rarely used. The source brightness distribution is superimposed directly on the object and therefore also appears as a brightness modulation of the image. A very uniform sourc ...
... Critical illumination images the light source directly onto the object. While very light efficient, critical illumination is rarely used. The source brightness distribution is superimposed directly on the object and therefore also appears as a brightness modulation of the image. A very uniform sourc ...
Optics Studio Manual - Department of Physics
... lenses, telescopes, microscopes, and other imaging devices, polarization, and interference and diffraction were all well understood and used before the electromagnetic theory of light was espoused by Maxwell. It is important that you view optics as phenomena that can be understood and applied as suc ...
... lenses, telescopes, microscopes, and other imaging devices, polarization, and interference and diffraction were all well understood and used before the electromagnetic theory of light was espoused by Maxwell. It is important that you view optics as phenomena that can be understood and applied as suc ...
Introduction to Acousto Optics
... The basic principles are the same for each method. The spectrometer's CPU records and stores spectra from a range of calibrated test samples. The software then tries to fit expressions that correlate spectral intensities to the known concentrations or other parameters of interest - within acceptable ...
... The basic principles are the same for each method. The spectrometer's CPU records and stores spectra from a range of calibrated test samples. The software then tries to fit expressions that correlate spectral intensities to the known concentrations or other parameters of interest - within acceptable ...
Optical properties of Pittsburgh glass subjected to mechanical and
... The measurements performed by means of integrating sphere and standard reflectometry give a rather average reflectance over a larger scale reflected samples. In order to study the reflection from small surface areas, an optical profilometer (OP) [9] was applied. The scattered radiation measured by O ...
... The measurements performed by means of integrating sphere and standard reflectometry give a rather average reflectance over a larger scale reflected samples. In order to study the reflection from small surface areas, an optical profilometer (OP) [9] was applied. The scattered radiation measured by O ...
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... agent. In these experiments such a decrease is stimulated by administration of a special immersion agent—60% water solution of Trazograph (a derivative of the 2-4-6 triiodobenzene acid used as x-ray contrasting solution in medical applications) with a refractive index equal to 1.43 at 24 °C. Interpr ...
... agent. In these experiments such a decrease is stimulated by administration of a special immersion agent—60% water solution of Trazograph (a derivative of the 2-4-6 triiodobenzene acid used as x-ray contrasting solution in medical applications) with a refractive index equal to 1.43 at 24 °C. Interpr ...
Demonstration of a large-scale optical exceptional point structure Liang Feng, Xuefeng Zhu,
... advantage of optical losses by engineering the entire complex dielectric permittivity plane, may be investigated to mimic the complex non-Hermitian Hamiltonians in quantum mechanics [2] and thus realize unique directional light transport and novel devices [3–9] at the parity-time phase transition po ...
... advantage of optical losses by engineering the entire complex dielectric permittivity plane, may be investigated to mimic the complex non-Hermitian Hamiltonians in quantum mechanics [2] and thus realize unique directional light transport and novel devices [3–9] at the parity-time phase transition po ...
Gain-Flattening Filters Using Dielectric Multilayer Thin Film
... ness monitor, in a position different from that of the substrate for thin film deposition, and to use a new monitoring substrate for each layer, but the need to keep accurate track of the film thickness distribution meant that this method was not suited to high-precision optical thickness control. I ...
... ness monitor, in a position different from that of the substrate for thin film deposition, and to use a new monitoring substrate for each layer, but the need to keep accurate track of the film thickness distribution meant that this method was not suited to high-precision optical thickness control. I ...
Superresolution size determination in fluorescence microscopy: A
... of the cos2 shaped standing wave field present between the two objective lenses; and z 2 is the position of one maximum 共arbitrarily chosen and then fixed兲 of the previously mentioned standing wave field, (z 2 ⫺z o )/C represents the phase of the standing wave field at the object position. Although ...
... of the cos2 shaped standing wave field present between the two objective lenses; and z 2 is the position of one maximum 共arbitrarily chosen and then fixed兲 of the previously mentioned standing wave field, (z 2 ⫺z o )/C represents the phase of the standing wave field at the object position. Although ...
Nanofabrication via Atom Optics with Chromium
... gradient of the light intensity.6 With a positive detuning, in our case 500 MHz, the force is in the direction of the minima of light intensity, i.e., toward the nodes of the standing wave. Near the nodes, the force is essentially linearly dependent on position because of the nearly quadratic form ...
... gradient of the light intensity.6 With a positive detuning, in our case 500 MHz, the force is in the direction of the minima of light intensity, i.e., toward the nodes of the standing wave. Near the nodes, the force is essentially linearly dependent on position because of the nearly quadratic form ...
Laser tweezers and their applications
... hologram produces a three-dimensional light field, when illuminated by a suitable laser. This allows several traps to be created simultaneously[25], from one laser source and controlled without the need for moving mirrors or acousto-optical deflectors. Suitably high-resolution hologram projection te ...
... hologram produces a three-dimensional light field, when illuminated by a suitable laser. This allows several traps to be created simultaneously[25], from one laser source and controlled without the need for moving mirrors or acousto-optical deflectors. Suitably high-resolution hologram projection te ...
Polarization rotation of slow light with orbital angular momentum in
... field 共i.e., Eⴱ兲, whereas the last term in Eq. 共10兲 has a negative frequency part 共E兲. For the same reason, Eq. 共10兲 contains a factor ⍀c, whereas Eq. 共11兲 contains a factor ⍀ⴱc . Equation 共11兲 relates ⌽3 to ⌽2 as ...
... field 共i.e., Eⴱ兲, whereas the last term in Eq. 共10兲 has a negative frequency part 共E兲. For the same reason, Eq. 共10兲 contains a factor ⍀c, whereas Eq. 共11兲 contains a factor ⍀ⴱc . Equation 共11兲 relates ⌽3 to ⌽2 as ...
Basics of Non-Linear Fiber Optics
... The refractive index profile along the length of the fiber is no more constant now but has a shape same as the pulse power profile. Since the refractive index profile is created by the pulse itself, it slides along with the pulse. The pulse energy has now preference to stay near its peak, as refract ...
... The refractive index profile along the length of the fiber is no more constant now but has a shape same as the pulse power profile. Since the refractive index profile is created by the pulse itself, it slides along with the pulse. The pulse energy has now preference to stay near its peak, as refract ...
Microscopes
... A light microscope, even one with perfect lenses and perfect illumination, simply cannot be used to distinguish objects that are smaller than half the wavelength of light. To see tiny particles under a microscope, scientists must bypass light altogether and use a different sort of "illumination," on ...
... A light microscope, even one with perfect lenses and perfect illumination, simply cannot be used to distinguish objects that are smaller than half the wavelength of light. To see tiny particles under a microscope, scientists must bypass light altogether and use a different sort of "illumination," on ...
Post-Mortem Ultra-Structural Analysis of a Cornea Transplanted
... As a result, we began to wonder: ...
... As a result, we began to wonder: ...
Measurement and correction of transverse chromatic offsets for multi
... Fig. 3. Chromatic dispersion in AOSLO imaging. (A) When LCA is corrected, retinal images for all wavelengths (infrared, red, green) are in focus but offset laterally due to TCA. The imaged area of the retina is outlined on the fundus photograph (top). TCA offsets between colors are highlighted with ...
... Fig. 3. Chromatic dispersion in AOSLO imaging. (A) When LCA is corrected, retinal images for all wavelengths (infrared, red, green) are in focus but offset laterally due to TCA. The imaged area of the retina is outlined on the fundus photograph (top). TCA offsets between colors are highlighted with ...
Optical and Quantum Communications
... Each M block in Fig. 1 is a quantum memory in which a single ultracold 87Rb atom is confined by a CO2-laser trap in an ultra-high vacuum chamber with cryogenic walls within a high-finesse single-ended optical cavity. An abstract representation of the relevant hyperfine levels for such a memory is gi ...
... Each M block in Fig. 1 is a quantum memory in which a single ultracold 87Rb atom is confined by a CO2-laser trap in an ultra-high vacuum chamber with cryogenic walls within a high-finesse single-ended optical cavity. An abstract representation of the relevant hyperfine levels for such a memory is gi ...
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.