Report Liquid Lens
... meters. The closer objects are to a lens, the more the lens must bend the light to bring them into focus. So when an object is far away, a lens needs less optical power to bring it into focus than it does when the object is near. Our liquid lens changes its focus by changing its optical power throu ...
... meters. The closer objects are to a lens, the more the lens must bend the light to bring them into focus. So when an object is far away, a lens needs less optical power to bring it into focus than it does when the object is near. Our liquid lens changes its focus by changing its optical power throu ...
Upholding the diffraction limit in the focusing of light and sound
... criterion is “…appropriate to direct visual observations. With other methods of detection (e.g. photometric) the presence of two objects of much smaller angular separation than indicated by Rayleigh’s criterion may often be revealed.” Indeed, if any number of photons is available for the measurement ...
... criterion is “…appropriate to direct visual observations. With other methods of detection (e.g. photometric) the presence of two objects of much smaller angular separation than indicated by Rayleigh’s criterion may often be revealed.” Indeed, if any number of photons is available for the measurement ...
Fast-light for astrophysics - Laboratory for Atomic and Photonic
... research over the last decade [1–3]. Researchers have found new ways of controlling the index of refraction of various materials by combining laser beams of different frequencies which interact with them. In particular, we are able to achieve strong dispersion at frequencies where the material is tra ...
... research over the last decade [1–3]. Researchers have found new ways of controlling the index of refraction of various materials by combining laser beams of different frequencies which interact with them. In particular, we are able to achieve strong dispersion at frequencies where the material is tra ...
Visualization of modification of electric and magnetic dipole emission
... a process produced films with practically uniform thickness (which was confirmed with the profilometer after transferring the film to a flat surface). Immersing the substrate with metal squares, the film was transferred to the substrate covering both squares and a space between them. The thickness ...
... a process produced films with practically uniform thickness (which was confirmed with the profilometer after transferring the film to a flat surface). Immersing the substrate with metal squares, the film was transferred to the substrate covering both squares and a space between them. The thickness ...
plse2oximetry - Pheonix India
... • Self-adhesive probes are less susceptible to motion artifact and are less likely to come off if the patient moves than those that clip on. • However, they are usually not as well shielded from ambient light as clip-on probes. • probes are available in different sizes. If a probe is too large for ...
... • Self-adhesive probes are less susceptible to motion artifact and are less likely to come off if the patient moves than those that clip on. • However, they are usually not as well shielded from ambient light as clip-on probes. • probes are available in different sizes. If a probe is too large for ...
OPTICAL AND PASSIVATION PROPERTIES OF DOUBLE LAYER A
... ABSTRACT: The goal of this work is to study main trends regarding the transmittance and passivation properties of SiNy/a-Si:H ARC structures by variation and adjusting of the a-Si:H layer thickness. Experimental results on the transmittance for SiNx/a-Si:H/glass, a-Si:H/glass, SiNx/glass and on the ...
... ABSTRACT: The goal of this work is to study main trends regarding the transmittance and passivation properties of SiNy/a-Si:H ARC structures by variation and adjusting of the a-Si:H layer thickness. Experimental results on the transmittance for SiNx/a-Si:H/glass, a-Si:H/glass, SiNx/glass and on the ...
Analyzing optical spectra by computer simulation
... The last steps of spectrum analysis by computer simulation are the selection and adjustment of those model parameters which are to be determined by the method. Since the total fit deviation will depend on the fit parameter values in a very nonlinear and in most cases unpredictable way, there may be ...
... The last steps of spectrum analysis by computer simulation are the selection and adjustment of those model parameters which are to be determined by the method. Since the total fit deviation will depend on the fit parameter values in a very nonlinear and in most cases unpredictable way, there may be ...
Mirrors - Purdue Physics
... such that its extrapolation crosses the optical axis a distance from the surface of the mirror equal to the focal length of the mirror • The third ray begins at the top of the object and is directed so that its extrapolation would intersect the center of the sphere • This ray is reflected back on it ...
... such that its extrapolation crosses the optical axis a distance from the surface of the mirror equal to the focal length of the mirror • The third ray begins at the top of the object and is directed so that its extrapolation would intersect the center of the sphere • This ray is reflected back on it ...
Introduction: - TechSapphire
... these rays and waves are the same type of electromagnetic energy. They are different only because the length of their waves are different. When we see something by visible light, our eyes allow us to distinguish the light of different waves as different colors. The waves that are short are blue and ...
... these rays and waves are the same type of electromagnetic energy. They are different only because the length of their waves are different. When we see something by visible light, our eyes allow us to distinguish the light of different waves as different colors. The waves that are short are blue and ...
Retrieving microphysical properties of dust
... inherent limitations in the stereogrammetric method. However, for the purposes of this study, it is enough that they are complex-shaped and irregular and could plausibly be close to real particles in overall shape and composition. We consider both individual stereogrammetric particles as well as an ...
... inherent limitations in the stereogrammetric method. However, for the purposes of this study, it is enough that they are complex-shaped and irregular and could plausibly be close to real particles in overall shape and composition. We consider both individual stereogrammetric particles as well as an ...
Lens Aberrations and Ray Tracing 1 Background
... instead of a luminous point. The further off-axis, the worse this effect is. The image often exhibits a resemblance to a comet having its tail directed towards or away from the axis, which ...
... instead of a luminous point. The further off-axis, the worse this effect is. The image often exhibits a resemblance to a comet having its tail directed towards or away from the axis, which ...
Paper
... surface is equivalent to photons leaving the medium without reflection and would therefore receive a momentum of hk per incident photon. In contrast, as shown in Ref. [5], a reflecting surface within the medium will recoil with a momentum of 2nhk per photon. In this case, the standing wave forme ...
... surface is equivalent to photons leaving the medium without reflection and would therefore receive a momentum of hk per incident photon. In contrast, as shown in Ref. [5], a reflecting surface within the medium will recoil with a momentum of 2nhk per photon. In this case, the standing wave forme ...
What Light Do Plants Need? (EconoLux Publication)
... If a manufacturer wanted to improve their Lumen output figures to make their plant-lights seem like they have more output, then they could adjust the lamp spectrum so that they have more green and yellow output. Even though the plants can’t use a lot of this light, it would inflate the Lumen number. ...
... If a manufacturer wanted to improve their Lumen output figures to make their plant-lights seem like they have more output, then they could adjust the lamp spectrum so that they have more green and yellow output. Even though the plants can’t use a lot of this light, it would inflate the Lumen number. ...
Lecture0006c - Purdue University Cytometry Laboratories
... DCXR -- dichroic long pass, extended reflection DCXRU -- dichroic longpass, extended reflection including the UV PC -- polychroic beamsplitter. This is a beamsplitter that reflects and transmits more than two bands of light. GG -- Green Glass. Longpass absorption glass from Schott Glassworks with cu ...
... DCXR -- dichroic long pass, extended reflection DCXRU -- dichroic longpass, extended reflection including the UV PC -- polychroic beamsplitter. This is a beamsplitter that reflects and transmits more than two bands of light. GG -- Green Glass. Longpass absorption glass from Schott Glassworks with cu ...
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... In the present study, the applicability of the theoretical approach described was verified for the case of light scattering in a two-layered medium simulated with the 1% aqueous solution of intralipid, that resembles moving scatterers, and gel films containing TiO2 particles immersed into agar, that ...
... In the present study, the applicability of the theoretical approach described was verified for the case of light scattering in a two-layered medium simulated with the 1% aqueous solution of intralipid, that resembles moving scatterers, and gel films containing TiO2 particles immersed into agar, that ...
Small-core chalcogenide microstructured fibers for the infrared
... at 1:55 μm, and the n2 is very similar to that of the 2S2G glass (3.2 10–18 m2 =W at 1064 nm, 120 times higher than that of silica glass) [10]. The glass is transparent for bulk samples between 600 nm and 11 μm, giving the glass a red color. The phonon energy of this chalcogenide glass is around 350 ...
... at 1:55 μm, and the n2 is very similar to that of the 2S2G glass (3.2 10–18 m2 =W at 1064 nm, 120 times higher than that of silica glass) [10]. The glass is transparent for bulk samples between 600 nm and 11 μm, giving the glass a red color. The phonon energy of this chalcogenide glass is around 350 ...
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.