Confocal Microscopy - Emory Physics
... One drawback with imaging a point onto the specimen is that there are fewer emitted photons to collect at any given instant. Thus, to avoid building a noisy image each point must be illuminated for a long time to collect enough light to make an accurate measurement.[1] In turn, this increases the le ...
... One drawback with imaging a point onto the specimen is that there are fewer emitted photons to collect at any given instant. Thus, to avoid building a noisy image each point must be illuminated for a long time to collect enough light to make an accurate measurement.[1] In turn, this increases the le ...
Part 3 - MZA Associates Corporation
... account any intervening optics, and also any physical effects entering in along the path. If the optical path is in vacuum or still air, the image of the receiver as seen from the source will be generally be very sharp. If the path goes through an aberrating medium, the image will be blurred, and ma ...
... account any intervening optics, and also any physical effects entering in along the path. If the optical path is in vacuum or still air, the image of the receiver as seen from the source will be generally be very sharp. If the path goes through an aberrating medium, the image will be blurred, and ma ...
A New Fiber Optic Spring
... where ω is the angular frequency and b is the damping coe cient. The damping coe cient was found from the envelope of the damped oscillatory curve that is also plotted in Fig. 2. The exponential envelope has the form A exp(−bt/2m) and the calculated b value was 0.0218 N s/m. Finally, the spring cons ...
... where ω is the angular frequency and b is the damping coe cient. The damping coe cient was found from the envelope of the damped oscillatory curve that is also plotted in Fig. 2. The exponential envelope has the form A exp(−bt/2m) and the calculated b value was 0.0218 N s/m. Finally, the spring cons ...
Individually Addressable Submicron Scale Light
... negligible. Note also that light intensity shown on the left consistently appeared a bit stronger. Since this LED was a symmetrical structure, the only explanation is that electrons and holes have different mobilities, so that the emitting zone where electron-hole recombination occurs was not in the ...
... negligible. Note also that light intensity shown on the left consistently appeared a bit stronger. Since this LED was a symmetrical structure, the only explanation is that electrons and holes have different mobilities, so that the emitting zone where electron-hole recombination occurs was not in the ...
NONLINEAR OPTICS BASICS Units and Nomenclature
... orders of the nonlinear susceptibility (the cgs equation is obtained by dropping the free-space permitivitty coefficient 10). A second-order effect is associated with x(2), a third-order with x(3), and so on. In general, there are distinguishable electric field vectors (in eqn [10], the fields have ...
... orders of the nonlinear susceptibility (the cgs equation is obtained by dropping the free-space permitivitty coefficient 10). A second-order effect is associated with x(2), a third-order with x(3), and so on. In general, there are distinguishable electric field vectors (in eqn [10], the fields have ...
Novel technique for thermal lens measurement in commonly used
... The beam transmitted by the test substrate is coupled into a scanned optical cavity using two piezo actuated mirrors for auto-alignment and two spherical lenses for mode matching. For the alignment control loop, two quadrant photo diodes detected the beam reflected by the cavity at different Gouy ph ...
... The beam transmitted by the test substrate is coupled into a scanned optical cavity using two piezo actuated mirrors for auto-alignment and two spherical lenses for mode matching. For the alignment control loop, two quadrant photo diodes detected the beam reflected by the cavity at different Gouy ph ...
Full text - Simon Fraser University
... experimental result [18] of MoS2 on 285 nm SiO2 /Si near the peak in integrated intensity. Since it cannot explain the lower intensity for a monolayer, a transition downwards in y axis was made in the simulated result to better fit the experimental result (black solid). ...
... experimental result [18] of MoS2 on 285 nm SiO2 /Si near the peak in integrated intensity. Since it cannot explain the lower intensity for a monolayer, a transition downwards in y axis was made in the simulated result to better fit the experimental result (black solid). ...
Optical properties of metals and alloys
... incidence. (Senkrecht is a German word meaning perpendicular.) ®rs ~ ...
... incidence. (Senkrecht is a German word meaning perpendicular.) ®rs ~ ...
Optical Waveguides and Photodiodes in 0.18µm CMOS SOI with No Post-processing
... In this paper, we report optical waveguides and photo-detectors implemented in a conventional 0.18µm CMOS SOI process technology with no post-processing steps required. Recently several groups have reported optical waveguides in bulk CMOS [2,3] or thin buried oxide CMOS SOI process [4]. As these pro ...
... In this paper, we report optical waveguides and photo-detectors implemented in a conventional 0.18µm CMOS SOI process technology with no post-processing steps required. Recently several groups have reported optical waveguides in bulk CMOS [2,3] or thin buried oxide CMOS SOI process [4]. As these pro ...
Fine Structure Constant Defines Visual Transparency of Graphene
... air (a hydrocarbon layer partially covering graphene is always found in TEM; see, for example, ref. (S3)). To this end, we annealed our membranes in a hydrogen-argon atmosphere (S5) at 200C°, which significantly improved their cleanliness, as observed in TEM by using the membranes immediately after ...
... air (a hydrocarbon layer partially covering graphene is always found in TEM; see, for example, ref. (S3)). To this end, we annealed our membranes in a hydrogen-argon atmosphere (S5) at 200C°, which significantly improved their cleanliness, as observed in TEM by using the membranes immediately after ...
Flatland optics - Weizmann Institute of Science
... with the longitudinal coordinate (z) represented the signal domain. The other transversal coordinate ( y) was used as a parameter in describing the impact of the system on the signal. So we interpreted (x, z) as the coordinates of Flatland and ( y) as the pathway for a 3Dspaceland citizen who wants ...
... with the longitudinal coordinate (z) represented the signal domain. The other transversal coordinate ( y) was used as a parameter in describing the impact of the system on the signal. So we interpreted (x, z) as the coordinates of Flatland and ( y) as the pathway for a 3Dspaceland citizen who wants ...
PCT form - 1 - DESCRIPTION OPTICAL MEASURING DEVICE AND
... electrical structure of the nanoparticle measuring device. Figs. 7A and 7B are views for explaining the structure of a sample cell 21 shown in Fig. 6, and more specifically, Fig. 7A is a schematic front view of the sample cell 21 as seen in a laser beam irradiation direction, and Fig. 7B is a ...
... electrical structure of the nanoparticle measuring device. Figs. 7A and 7B are views for explaining the structure of a sample cell 21 shown in Fig. 6, and more specifically, Fig. 7A is a schematic front view of the sample cell 21 as seen in a laser beam irradiation direction, and Fig. 7B is a ...
Polarimeter - ScholarWorks@UNO
... polarimeter in which a single signal can provide a simul taneous identi?cation of the 16 elementsof a Mueller ...
... polarimeter in which a single signal can provide a simul taneous identi?cation of the 16 elementsof a Mueller ...
Single scattering by red blood cells
... corresponds well with Mie theory at 633 nm. However, they did not compare their data with other scattering theories, and they did not consider shorter wavelengths at which the absorption by hemoglobin is much stronger. Borovoi and Naats9 calculated the small-angle scattering amplitude of the erythro ...
... corresponds well with Mie theory at 633 nm. However, they did not compare their data with other scattering theories, and they did not consider shorter wavelengths at which the absorption by hemoglobin is much stronger. Borovoi and Naats9 calculated the small-angle scattering amplitude of the erythro ...
Robot formation motion planning using Fast Marching
... of the well-known hot road surface mirage, in which there appears to be ‘‘fake water’’ on the road which is produced by the light rays bending due to a change of the refraction index in air, with higher temperature (and lower refraction index) near the road surface. ...
... of the well-known hot road surface mirage, in which there appears to be ‘‘fake water’’ on the road which is produced by the light rays bending due to a change of the refraction index in air, with higher temperature (and lower refraction index) near the road surface. ...
Early Estimates of the Velocity of Light
... sisted.61From observations of the parallax of Mars made in 1671 to 1673the very years in which ROEMER was observing the satellites of Jupiter-a solar distance of 91,600 terrestrial radii was obtained.62This was frequently more roundly expressed as 22,000 earth radii.63PICARD had in the years just pr ...
... sisted.61From observations of the parallax of Mars made in 1671 to 1673the very years in which ROEMER was observing the satellites of Jupiter-a solar distance of 91,600 terrestrial radii was obtained.62This was frequently more roundly expressed as 22,000 earth radii.63PICARD had in the years just pr ...
- City Research Online
... index for the quasi-TM mode with the bending radius is shown in Fig.2. In this region, two distinct modes can easily be identified (their field profiles are shown later on). The solid line represents the first, Hx1 eigenmode, with a higher effective index and that of the second eigenmode, Hx2, show ...
... index for the quasi-TM mode with the bending radius is shown in Fig.2. In this region, two distinct modes can easily be identified (their field profiles are shown later on). The solid line represents the first, Hx1 eigenmode, with a higher effective index and that of the second eigenmode, Hx2, show ...
Anti-reflective coating
An antireflective or anti-reflection (AR) coating is a type of optical coating applied to the surface of lenses and other optical elements to reduce reflection. In typical imaging systems, this improves the efficiency since less light is lost. In complex systems such as a telescope, the reduction in reflections also improves the contrast of the image by elimination of stray light. This is especially important in planetary astronomy. In other applications, the primary benefit is the elimination of the reflection itself, such as a coating on eyeglass lenses that makes the eyes of the wearer more visible to others, or a coating to reduce the glint from a covert viewer's binoculars or telescopic sight.Many coatings consist of transparent thin film structures with alternating layers of contrasting refractive index. Layer thicknesses are chosen to produce destructive interference in the beams reflected from the interfaces, and constructive interference in the corresponding transmitted beams. This makes the structure's performance change with wavelength and incident angle, so that color effects often appear at oblique angles. A wavelength range must be specified when designing or ordering such coatings, but good performance can often be achieved for a relatively wide range of frequencies: usually a choice of IR, visible, or UV is offered.