Point spread function engineering in confocal scanning microscopy
... The improvement of the performance of optical microscopes has aimed many researches along the last decades. Conventional wide-field microscopes are close to reach their maximum efficiency through the use of the available objectives with numerical apertures (NA) up to 1.4. However, when using this ki ...
... The improvement of the performance of optical microscopes has aimed many researches along the last decades. Conventional wide-field microscopes are close to reach their maximum efficiency through the use of the available objectives with numerical apertures (NA) up to 1.4. However, when using this ki ...
Optics - Filter Properties & manipulation of light in flow cytometry
... • Small amounts of incident light are reflected at the interface between two material of different RI • Thickness of the material will alter the constructive or destructive interference patterns - increasing or decreasing certain wavelengths • Optical filters can thus be created that “interfere” wit ...
... • Small amounts of incident light are reflected at the interface between two material of different RI • Thickness of the material will alter the constructive or destructive interference patterns - increasing or decreasing certain wavelengths • Optical filters can thus be created that “interfere” wit ...
Numerical Analysis of Relative Phase and Amplitude at the
... characteristics of the fibers will appear at high field intensities. Highest density power in the downtown core and decline to the shell. Where the largest field intensity, the refractive index is greatest. This behavior is known as Kerr effect. The result of this phenomenon is the dependence of the ...
... characteristics of the fibers will appear at high field intensities. Highest density power in the downtown core and decline to the shell. Where the largest field intensity, the refractive index is greatest. This behavior is known as Kerr effect. The result of this phenomenon is the dependence of the ...
Laser - nptel
... Laser beams are characterized by the following special properties : Coherence: Laser beam is highly coherent, i.e, different parts of the beam maintain a phase relationship bfor a long time. this results in interference effect. When a laser beam reflects off a surface, the reflected light can be see ...
... Laser beams are characterized by the following special properties : Coherence: Laser beam is highly coherent, i.e, different parts of the beam maintain a phase relationship bfor a long time. this results in interference effect. When a laser beam reflects off a surface, the reflected light can be see ...
Composite THz materials using aligned metallic
... size of the features making a composite is much smaller than the wavelength of light, then such a composite can be thought of as a homogeneous (however, anisotropic) medium [3,4] that can exhibit various unusual properties. One possible implementation of a THz metamaterial is in the form of the peri ...
... size of the features making a composite is much smaller than the wavelength of light, then such a composite can be thought of as a homogeneous (however, anisotropic) medium [3,4] that can exhibit various unusual properties. One possible implementation of a THz metamaterial is in the form of the peri ...
LETTERS
... width of the Bragg diffraction can be calculated from an integration of the optical Bloch equations for a two-level system with a time dependent two-photon Rabi frequency. In our case, the calculated peak two-photon Rabi frequency is V2 y2p 30 kHz, and the predicted width is 0.08h̄k, a factor of 2 ...
... width of the Bragg diffraction can be calculated from an integration of the optical Bloch equations for a two-level system with a time dependent two-photon Rabi frequency. In our case, the calculated peak two-photon Rabi frequency is V2 y2p 30 kHz, and the predicted width is 0.08h̄k, a factor of 2 ...
Ultrasensitive Beam Deflection Measurement via Interferometric
... interaction between transverse beam deflection (meter) and which path degree of freedom (system). Post-selection is achieved simply by monitoring the light that exits the dark port of the interferometer. Tuning the SBC to add a small but nonzero relative phase allows a small amount of light out of t ...
... interaction between transverse beam deflection (meter) and which path degree of freedom (system). Post-selection is achieved simply by monitoring the light that exits the dark port of the interferometer. Tuning the SBC to add a small but nonzero relative phase allows a small amount of light out of t ...
Journal of Non-Crystalline Solids 114 (1989) 813-815
... Microcrystalline Si films are often produced by variations of the conditions for the the deposition of hydrogenated amorphous Si (a-Si:H). The films exhibit a structure which is a combination of amorphous Si and crystalline Si regions. The films often exhibit a higher electron mobility than a-Si:H, ...
... Microcrystalline Si films are often produced by variations of the conditions for the the deposition of hydrogenated amorphous Si (a-Si:H). The films exhibit a structure which is a combination of amorphous Si and crystalline Si regions. The films often exhibit a higher electron mobility than a-Si:H, ...
Optical field profile evaluation on silica high Optical field profile
... a portion of optical field only exists at approximatly 0.2 µm from the waveguide sidewall, as is shown in Fig. 2. Thus, we need to measure the optical field of the waveguide cross section (near field pattern; NFP) with a precision of around 0.01 µm to detect the portion of optical field that propaga ...
... a portion of optical field only exists at approximatly 0.2 µm from the waveguide sidewall, as is shown in Fig. 2. Thus, we need to measure the optical field of the waveguide cross section (near field pattern; NFP) with a precision of around 0.01 µm to detect the portion of optical field that propaga ...
Session 10 Wave Optics
... So far we’ve discussed adding waves with different phases in rather an abstract manner. How do we actually bring this about? Under what circumstances are coherent waves superposed in the laboratory? Before the advent of the laser as a coherent light source the only way of doing this was to get a lig ...
... So far we’ve discussed adding waves with different phases in rather an abstract manner. How do we actually bring this about? Under what circumstances are coherent waves superposed in the laboratory? Before the advent of the laser as a coherent light source the only way of doing this was to get a lig ...
The Response of Polarization Maintaining Fibers upon Temperature
... ∆ne of particular PM fibers are presented in Tab. 1. In the case there is m mumber of exposed lengths of PMF the value of the factor shall be LB /ml. The differential indices ∆ne of studied PM fibers are practically the same and that the difference of refractive indices between fast and slow axes an ...
... ∆ne of particular PM fibers are presented in Tab. 1. In the case there is m mumber of exposed lengths of PMF the value of the factor shall be LB /ml. The differential indices ∆ne of studied PM fibers are practically the same and that the difference of refractive indices between fast and slow axes an ...
J Comp Physiol A (1993) 173:143-149
... studied by analyzing video recordings of the frontal aspect of animals flying while tethered in a wind tunnel (for details see Hengstenberg et al. 1986). The wind tunnel held a pattern cylinder, coaxial with the body axis of the fly, and the pattern consisting of a bright "sky" and a dark "ground" c ...
... studied by analyzing video recordings of the frontal aspect of animals flying while tethered in a wind tunnel (for details see Hengstenberg et al. 1986). The wind tunnel held a pattern cylinder, coaxial with the body axis of the fly, and the pattern consisting of a bright "sky" and a dark "ground" c ...
Recent advances in transformation optics
... covering a dielectric or conducting object of a certain size with multilayered metallic shells may reduce the ‘‘visibility’’ of the object by several orders of magnitude simultaneously at multiple frequencies.19 Meanwhile, researchers have been actively exploring the interesting physics associated w ...
... covering a dielectric or conducting object of a certain size with multilayered metallic shells may reduce the ‘‘visibility’’ of the object by several orders of magnitude simultaneously at multiple frequencies.19 Meanwhile, researchers have been actively exploring the interesting physics associated w ...
TEM - Department of Mechanical Engineering
... To increase the mean free path of the electron gas interaction, a standard TEM is evacuated to low pressures, typically on the order of 10−4 Pa. The need for this is twofold: first the allowance for the voltage difference between the cathode and the ground without generating an arc, and secondly to ...
... To increase the mean free path of the electron gas interaction, a standard TEM is evacuated to low pressures, typically on the order of 10−4 Pa. The need for this is twofold: first the allowance for the voltage difference between the cathode and the ground without generating an arc, and secondly to ...
Optics and Photonics H. A. Haus
... µm wavelength) has led to noise reduction 5.1 dB below shot noise [1]. The noise achievable with pulses propagating at zero dispersion is limited to appr. 7dB below shot noise even if the system were lossless. This limit is imposed by the fact that the pulse does not squeeze uniformly over its inten ...
... µm wavelength) has led to noise reduction 5.1 dB below shot noise [1]. The noise achievable with pulses propagating at zero dispersion is limited to appr. 7dB below shot noise even if the system were lossless. This limit is imposed by the fact that the pulse does not squeeze uniformly over its inten ...
Recent advances in transformation optics
... covering a dielectric or conducting object of a certain size with multilayered metallic shells may reduce the ‘‘visibility’’ of the object by several orders of magnitude simultaneously at multiple frequencies.19 Meanwhile, researchers have been actively exploring the interesting physics associated w ...
... covering a dielectric or conducting object of a certain size with multilayered metallic shells may reduce the ‘‘visibility’’ of the object by several orders of magnitude simultaneously at multiple frequencies.19 Meanwhile, researchers have been actively exploring the interesting physics associated w ...
John Kerr and his effects found in 1877 and 1878
... His second observation is a bit more involved, since now he manipulates the first Nicol, ‘‘ever so little’’ as he stresses. Surely what happens is a variation of the angle of incidence, see Figure 4 . This is about all that can be said using only classical optics. As John Kerr realized, it seemed to ...
... His second observation is a bit more involved, since now he manipulates the first Nicol, ‘‘ever so little’’ as he stresses. Surely what happens is a variation of the angle of incidence, see Figure 4 . This is about all that can be said using only classical optics. As John Kerr realized, it seemed to ...
Influence of a thin metal layer on a beam propagation in
... what is corrected with the theoretical meaning [15,19], an additional layer does not allow to leak the beam out of its space. As it can also be noticed the difference in dispersion characteristics for different metal layers is an influence of optical parameters of metals like refractive or extinctio ...
... what is corrected with the theoretical meaning [15,19], an additional layer does not allow to leak the beam out of its space. As it can also be noticed the difference in dispersion characteristics for different metal layers is an influence of optical parameters of metals like refractive or extinctio ...
Coherent Laser Beam Addition: Application of Binary-Optics Technology An
... from a conventional incandescent light bulb. The laser's radiance, however, is orders of magnitude greater due to the very small beam spread. The high radiance is a consequence of the spatial coherence across the laser beam (phases of two spatially distinct points on the wavefront are locked togethe ...
... from a conventional incandescent light bulb. The laser's radiance, however, is orders of magnitude greater due to the very small beam spread. The high radiance is a consequence of the spatial coherence across the laser beam (phases of two spatially distinct points on the wavefront are locked togethe ...
Microscopy - PSSurvival.com
... contrast. It was developed by the Dutch physicist Frits Zernike in the 1930s (for which he was awarded the Nobel Prize in 1953). The nucleus in a cell for example will show up darkly against the surrounding cytoplasm. Contrast is excellent; however it is not for use with thick objects. Frequently, a ...
... contrast. It was developed by the Dutch physicist Frits Zernike in the 1930s (for which he was awarded the Nobel Prize in 1953). The nucleus in a cell for example will show up darkly against the surrounding cytoplasm. Contrast is excellent; however it is not for use with thick objects. Frequently, a ...
Polarized Light
... Analysis of unknown polarization • If a linear polarizer is rotated and the transmission goes to zero at some angle, then input is linearly polarized, DONE. • If no there is no variation with polarizer rotation, light is circularly polarized, unpolarized, or a mixture of these – to distinguish betw ...
... Analysis of unknown polarization • If a linear polarizer is rotated and the transmission goes to zero at some angle, then input is linearly polarized, DONE. • If no there is no variation with polarizer rotation, light is circularly polarized, unpolarized, or a mixture of these – to distinguish betw ...
IEEE J. Quantum Electron. 33, 970 (1997)
... the II–VI material degradation in light-emitting devices play a significant role. Yet very little is understood about the physical mechanisms of the degradation in II–VI materials. On the other hand, in the early days of III–V laser-diode and LED research, the dislocations, dark-line and dark-spot d ...
... the II–VI material degradation in light-emitting devices play a significant role. Yet very little is understood about the physical mechanisms of the degradation in II–VI materials. On the other hand, in the early days of III–V laser-diode and LED research, the dislocations, dark-line and dark-spot d ...
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.