Television slit-lamp biomicroscopy
... pointing because of the great contrast between the light on the object of interest, e.g., cornea or lens, and the surrounding structures, which are not illuminated directly. This problem is readily negotiated by adding a secondary fibreoptic source (see above) to provide background illumination. Thi ...
... pointing because of the great contrast between the light on the object of interest, e.g., cornea or lens, and the surrounding structures, which are not illuminated directly. This problem is readily negotiated by adding a secondary fibreoptic source (see above) to provide background illumination. Thi ...
A crack method, on the BB84 protocol
... the angle between the two linear polarization directions is 45 degrees. For each of the four optical paths described above, a "45 degree linearly polarized beam splitter" is further connected (as shown in the figure below) ...
... the angle between the two linear polarization directions is 45 degrees. For each of the four optical paths described above, a "45 degree linearly polarized beam splitter" is further connected (as shown in the figure below) ...
Chromatic Dispersion in optical Communications
... Gbit/s. These distances are too short. So we can change a source and instead of the LED we use a DFB laser with an external modulator based on the principle of Mach-Zehnder interferometer. This greatly reduces the spectral half width of the light source. It will be considerably smaller than the spec ...
... Gbit/s. These distances are too short. So we can change a source and instead of the LED we use a DFB laser with an external modulator based on the principle of Mach-Zehnder interferometer. This greatly reduces the spectral half width of the light source. It will be considerably smaller than the spec ...
Figure measurement of a large optical flat with a Fizeau
... We made a 2-m class flat mirror at the University of Arizona College of Optical Sciences. We used an instantaneous phase-shifting Fizeau interferometer1 to test it. The largest reference flat available to us was 1 in meter diameter which was not big enough to measure the full-aperture of the test fl ...
... We made a 2-m class flat mirror at the University of Arizona College of Optical Sciences. We used an instantaneous phase-shifting Fizeau interferometer1 to test it. The largest reference flat available to us was 1 in meter diameter which was not big enough to measure the full-aperture of the test fl ...
Accelerating Light Beams along Arbitrary Convex
... narrows instead of being invariant during propagation. This suggests that the acceleration property of finite-power accelerating beams is due only to the phase relation between the wavelets forming the beam, whereas the self-similarity feature of the peak intensity at different propagation planes ca ...
... narrows instead of being invariant during propagation. This suggests that the acceleration property of finite-power accelerating beams is due only to the phase relation between the wavelets forming the beam, whereas the self-similarity feature of the peak intensity at different propagation planes ca ...
Wavefront retrieval of amplified femtosecond
... validity of the Hartmann-Shack (H-S) sensor to measure the phase of this kind of laser systems [6]. Wavefront sensors based on multi-wave lateral shearing interferometry have also been widely used in this field [7–9]. Their main advantages are the achromaticity and a high dynamic range. In particula ...
... validity of the Hartmann-Shack (H-S) sensor to measure the phase of this kind of laser systems [6]. Wavefront sensors based on multi-wave lateral shearing interferometry have also been widely used in this field [7–9]. Their main advantages are the achromaticity and a high dynamic range. In particula ...
Ultralow-Noise SiN Trampoline Resonators for
... Advances in nanofabrication over the past decades have enabled the growth and patterning of pristine materials, and the creation of mechanical force sensors of extraordinary quality. Cantilevers sensitive to attonewton forces at room temperature have been fabricated from silicon (50 aN=Hz1=2 [1]) an ...
... Advances in nanofabrication over the past decades have enabled the growth and patterning of pristine materials, and the creation of mechanical force sensors of extraordinary quality. Cantilevers sensitive to attonewton forces at room temperature have been fabricated from silicon (50 aN=Hz1=2 [1]) an ...
Superprism phenomena in planar photonic crystals
... cm and have a capacity of 40 channels. Future networks will require hundreds of channels and therefore need much more compact devices, particularly if the multiplexers are to be combined with additional functionality, such as switching and driver electronics. Photonic crystals (PhCs), because of the ...
... cm and have a capacity of 40 channels. Future networks will require hundreds of channels and therefore need much more compact devices, particularly if the multiplexers are to be combined with additional functionality, such as switching and driver electronics. Photonic crystals (PhCs), because of the ...
Optics - MIT Fab Lab
... where f is the focal length of the lens. This is the lens equation, giving the relationship between where a ray starts on the axis on one side of the lens and where it crosses the axis on the other side. Notice that the angles have dropped out of this equation: all rays starting at the same distance ...
... where f is the focal length of the lens. This is the lens equation, giving the relationship between where a ray starts on the axis on one side of the lens and where it crosses the axis on the other side. Notice that the angles have dropped out of this equation: all rays starting at the same distance ...
Chiroptical Spectroscopy - Ruhr
... If angle of incidence ≠ 0°, reflection coefficients are different for waves polarized parallel or perpendicular to plane of incidence. Circular polarization destroyed Intensity of linear polarized light angle dependent ...
... If angle of incidence ≠ 0°, reflection coefficients are different for waves polarized parallel or perpendicular to plane of incidence. Circular polarization destroyed Intensity of linear polarized light angle dependent ...
Sidelobe decline in single-photon 4Pi microscopy by Toraldo rings
... (Wilson, 1990). The confocal technique was specifically designed to improve the axial resolution. However, it is notable that, due to the laws of diffraction, the resolution in the direction of the optical axis is, depending on the numerical aperture (NA) of the lenses, about three times poorer than ...
... (Wilson, 1990). The confocal technique was specifically designed to improve the axial resolution. However, it is notable that, due to the laws of diffraction, the resolution in the direction of the optical axis is, depending on the numerical aperture (NA) of the lenses, about three times poorer than ...
Laser Modes
... frequency of light is emitted with a well-defined phase—and spatial coherence—the light is also emitted in a highly parallel beam.) However, the wavelength distribution of laser light is more complicated than you might initially think. Rather than emitting at a single wavelength, the laser instead e ...
... frequency of light is emitted with a well-defined phase—and spatial coherence—the light is also emitted in a highly parallel beam.) However, the wavelength distribution of laser light is more complicated than you might initially think. Rather than emitting at a single wavelength, the laser instead e ...
Chapter 30 . Optical Testing
... cameras (Womack et al., 1979), photoelectric scanners, and digitizing tablets. Review ...
... cameras (Womack et al., 1979), photoelectric scanners, and digitizing tablets. Review ...
Using the Spectrophotometer
... • Wipe off your cuvette containing the blank solution with a KimWipe and place it in the single cuvette holder or in position 1 of the multiple cuvette holder in the sample compartment. Make sure that position 1 is aligned with the light source. Be sure to have the clear faces of the cuvette facing ...
... • Wipe off your cuvette containing the blank solution with a KimWipe and place it in the single cuvette holder or in position 1 of the multiple cuvette holder in the sample compartment. Make sure that position 1 is aligned with the light source. Be sure to have the clear faces of the cuvette facing ...
Optical Properties of Solids
... and green light, but not red. Luminescence is the general name given to the process of spontaneous emission of light by excited atoms in a solid state material. One of the ways in which the atoms can be promoted into excited states prior to spontaneous emission is by the absorption of light. Lumines ...
... and green light, but not red. Luminescence is the general name given to the process of spontaneous emission of light by excited atoms in a solid state material. One of the ways in which the atoms can be promoted into excited states prior to spontaneous emission is by the absorption of light. Lumines ...
Surface Watch - YMS Magazine
... that, for conducting films, a very strong correlation exists between SURFmonitor microhaze measurements and frequency-matched AFM measurements of RMS roughness. The correlation between the frequency-matched RMS roughness and the measured haze value can be used to construct a microroughness map of th ...
... that, for conducting films, a very strong correlation exists between SURFmonitor microhaze measurements and frequency-matched AFM measurements of RMS roughness. The correlation between the frequency-matched RMS roughness and the measured haze value can be used to construct a microroughness map of th ...
Phase function
... • Brillouin scattering: inelastic scattering – Arises from acoustic waves propagating through a medium and thus causes inhomogeneities of the R. I. – It can have either higher or lower frequencies because scattering particles are moving toward (or away from) the light source considered as an op ...
... • Brillouin scattering: inelastic scattering – Arises from acoustic waves propagating through a medium and thus causes inhomogeneities of the R. I. – It can have either higher or lower frequencies because scattering particles are moving toward (or away from) the light source considered as an op ...
properties of helium–neon lasers - UCSB Physics
... The fact that there are multiple frequencies contained in a laser beam places restrictions on the suitability of using a particular laser for an interference experiment. Interference patterns are observed when two beams of light take different paths to reach the same spot. But if the distance travel ...
... The fact that there are multiple frequencies contained in a laser beam places restrictions on the suitability of using a particular laser for an interference experiment. Interference patterns are observed when two beams of light take different paths to reach the same spot. But if the distance travel ...
Get PDF - OSA Publishing
... that is used in the imaging or focusing application, without the need of moving or remounting the sample. To prove the principle, we introduce a planar refractive index mismatch into a PSF measurement system. The first step of our method characterizes the aberration inducing medium. Two independent ...
... that is used in the imaging or focusing application, without the need of moving or remounting the sample. To prove the principle, we introduce a planar refractive index mismatch into a PSF measurement system. The first step of our method characterizes the aberration inducing medium. Two independent ...
Visual Loss - Diagnostic Centers of America
... presenting symptoms. Most cases occur in middle-aged or elderly patients, more often in women than men. The tumor may be cuff-like, surrounding the optic nerves, or eccentrically located on one side of the nerve. CT scans will often demonstrate calcifications. Enhancement parallel to the length of t ...
... presenting symptoms. Most cases occur in middle-aged or elderly patients, more often in women than men. The tumor may be cuff-like, surrounding the optic nerves, or eccentrically located on one side of the nerve. CT scans will often demonstrate calcifications. Enhancement parallel to the length of t ...
投影片 1
... that intracameral triamcinolone usage can cause foreign reaction and pseudohypopyon formation in human eye. The presence of histiocytes surrounding the TA molecules in our specimen indicated that the intracamerally injected unfiltered Kenacort could have induced foreign body reaction. o Theorectical ...
... that intracameral triamcinolone usage can cause foreign reaction and pseudohypopyon formation in human eye. The presence of histiocytes surrounding the TA molecules in our specimen indicated that the intracamerally injected unfiltered Kenacort could have induced foreign body reaction. o Theorectical ...
Efficient output coupling of intracavity high harmonic generation
... revolutionized optical frequency metrology [1, 2]. However these techniques have in general been limited to the visible and near IR spectral regions. Meanwhile, progress in short-wavelength light sources has been rapid, achieving unprecedented temporal resolution, spectral coverage, and brightness [ ...
... revolutionized optical frequency metrology [1, 2]. However these techniques have in general been limited to the visible and near IR spectral regions. Meanwhile, progress in short-wavelength light sources has been rapid, achieving unprecedented temporal resolution, spectral coverage, and brightness [ ...
Paper Title
... many advantages due to high tunability of the acousto-optical technique. Namely, exciting frequency (and therefore grating period) can be adjusted with ppm accuracy to any value in the kHz – GHz region, enabling therefore tuning (scaling) the given waveguide to many available lasers or other narrow- ...
... many advantages due to high tunability of the acousto-optical technique. Namely, exciting frequency (and therefore grating period) can be adjusted with ppm accuracy to any value in the kHz – GHz region, enabling therefore tuning (scaling) the given waveguide to many available lasers or other narrow- ...
Syllabus
... narrative that describes the physical situation, the equations and variables used and their physical importance, and finally draws a conclusion in a way that build intuition about the topic under study. A list of equations will not be graded and will be returned. Although late or improperly done hom ...
... narrative that describes the physical situation, the equations and variables used and their physical importance, and finally draws a conclusion in a way that build intuition about the topic under study. A list of equations will not be graded and will be returned. Although late or improperly done hom ...
Circular Dichroism (CD) and Optical Rotatory Dispersion (ORD
... Optical Rotatory Dispersion (ORD) Spectroscopy • The refractive indices for R and L varies as a function of wavelength, as does the difference between them • One can measure Δn by measuring the rotation of linearly polarized light ...
... Optical Rotatory Dispersion (ORD) Spectroscopy • The refractive indices for R and L varies as a function of wavelength, as does the difference between them • One can measure Δn by measuring the rotation of linearly polarized light ...
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.