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left-handed materials
left-handed materials

A Review of Effect of Light on Microalgae Growth
A Review of Effect of Light on Microalgae Growth

... and enhance public awareness .It's well known that fossil fuels will not survive for long time because of the dangerous accumulation of "green house gas" CO2 and due to depleting resources, depending on that it's very important to explore renewable energy source that's eco-friendly and economical, s ...
PH4027 - Optoelectronics & Nonlinear Optics
PH4027 - Optoelectronics & Nonlinear Optics

... a large number of everyday applications, ranging from the ubiquitous LED, televisions and computer displays, as well as lasers in CD players, to sophisticated equipment for high-speed telecommunications applications that form the backbone of the internet. While classical optics is concerned with lin ...
W11Physics1CLec26Afkw
W11Physics1CLec26Afkw

SLR-17-03e
SLR-17-03e

... The references in Regulation No. 37 par. 3.6.2., Regulation No. 99 par. 3.9.2. and Regulation No. 128 par. 3.7.1. to colour definitions in Regulation No. 48 should be updated, once available; One of the principles behind the light sources simplification is that light source regulations refer to R.E. ...
Broadband Semiconductor Light Source for Optical Sensing
Broadband Semiconductor Light Source for Optical Sensing

... Optical Sensing is a technology to observe mutual action occurring by irradiating an object with light and check the structure and characteristics of the object nondestructively. Recently, this technology is applied positively in the field of medical diagnosis, and OCT (Optical Coherence Tomography) ...
X-Ray standing waves for investigation of periodic multilayers.
X-Ray standing waves for investigation of periodic multilayers.

... For Bragg diffraction purposes, a layered-synthetic microstructure (LSM) is fabricated (typically by sputter deposition) to have a depth-periodic layered structure consisting of 10 to 200 layer pairs of alternating high- and low-electron density materials, such as Mo and Si. Sufficient uniformity in ...
Research on the Design of an Optical Information Storage Sensing
Research on the Design of an Optical Information Storage Sensing

... beam focuses on the servo layer for focusing and tracking, while the first-order diffraction beams focuses on the recording layer. The two beams are controlled and focus on the corresponding layers independently when changing the positions of the objective lens and the DOE. Therefore, the zeroth-ord ...
Single-frequency blue light generation by single-pass
Single-frequency blue light generation by single-pass

... The wavelength of the 1060 nm tapered amplifier operated in the coupled cavity is tuned to 1063.5 nm to facilitate phase matching with the incoming 807.5 nm light at a temperature of 34  C in the PPKTP crystal. The power in the enhancement cavity can be monitored by the power leaking through the ca ...
PDF
PDF

... caused by the close-to-surface layers are not observed [Fig. 2(b)]. Thus the alternation of strong- and weak-intensity maxima in the diffraction pattern is caused by the surface confinement, similar to the case of 1D gratings.6 When the applied voltage is changed, the layer undulations become more o ...
Negative refraction, subwavelength focusing and beam formation by
Negative refraction, subwavelength focusing and beam formation by

... not resolved. Besides, the large reflection due to high index contrast at the interface significantly reduces the transmitted power when compared with the high (63%) transmission obtained from the photonic crystal at this operating frequency. So, even if the observed subwavelength is associated with ...
doc - IYPT Archive
doc - IYPT Archive

... 3.3. Computer simulation This math model was made to calculate the intensity of the light at the end of the “dark” jet. Simulation required some approximations. The jet was presented with two parabolas. They have same formulas but one is translated above another for the value of the diameter of the ...
Telescopes
Telescopes

1 CHAPTER 4 OPTICAL ABERRATIONS 4.1 Introduction We have
1 CHAPTER 4 OPTICAL ABERRATIONS 4.1 Introduction We have

peer-review article - NC State University
peer-review article - NC State University

... where the indices stand for the color of the treated sample (1) and untreated sample (2). An atomic force microscope was used to measure the roughness of the oil-coated samples. Because it was not possible to perform AFM scans on solid wood due to the macroroughness, coated Typha fibers (Typha latif ...
A single atom in free space as a quantum aperture
A single atom in free space as a quantum aperture

... focused onto an area A ∼ σ would experience a loss (as resonance fluorescence) comparable to the incident energy of the beam itself and would, for off-resonant excitation, suffer an appreciable phase shift. In terms of nonlinear properties, note that the saturation intensity for a two-state atom in ...
Optical Materials for LWIR Applications
Optical Materials for LWIR Applications

... visible glasses by 2 orders of magnitude or more. Often LWIR materials are denser and thus weigh more than visible glasses. In some cases, such as sodium chloride, the material can be highly soluble in water, making it unusable in humid environments. Also, since most materials have high reflectivity ...
TRIPURA UNIVERSITY 2014
TRIPURA UNIVERSITY 2014

... Dipole-dipole interaction. Dielectric medium, polarization and susceptibility, boundary conditions of D and E, dielectric spheres in uniform field. Lecture Period: 05 Intensity of magnetization, permeability, susceptibility and their relations, Boundary conditions for B and H, Hysteresis and hystere ...
The interference characteristics of light
The interference characteristics of light

... The problem is that this is not enough for the latter information process system to give effective command, so we cannot decide whether to attack the target or not. If some parameters such as the incidence angle of the detected laser beam entering the target optical lens can be gained, we can know w ...
On geometric optics and surface waves for light scattering by spheres
On geometric optics and surface waves for light scattering by spheres

... incident waves at the grazing angles near the edge of a sphere and propagate along its surface into the shadow region [1,16]. We further applied the RBR approach coupled with surface wave contributions to spheres with layer structure for potential application to aggregate particles involving interna ...
Review !x
Review !x

... all the light observed passing through each slit is due to wavelets emitted from a single point at the center of that slit April 8, 2005 ...
ELECTRO-OPTICS
ELECTRO-OPTICS

... Section 18.3 is devoted to the electro-optic properties of liquid crystals. An electric field applied to the molecules of a liquid crystal causes them to alter their orientations. This leads to changes in the optical properties of the medium, i.e., it exhibits an electro-optic effect. The molecules ...
apparatus for teaching physics Litiholo holography – So easy even a
apparatus for teaching physics Litiholo holography – So easy even a

... One of the things that may have prevented science teachers it in the slot on the plate holder. A wait time of three minutes and parents from having their students get involved with hois suggested to allow small vibrations to damp out. The shutter lography was the chemistry needed to develop the holo ...
(full text)
(full text)

... properties of our fabricated structures and the incident field. A needs to be maximized to make efficient detectors; however, there are many ways an incident photon can remain unabsorbed. For example, the photon can pass through open gaps between the nanowires or be transmitted through the subwavele ...
The effect of zero points in the modulation of light in a Fabry
The effect of zero points in the modulation of light in a Fabry

... cy w, of one of the interferometer modes. The change are then modulated in frequency and in amplitude. At of the modulation parameter with w is then also abrupt p >> p the field of the wave in the interferometer is and is accompanied by a discontinuity of the correspond- primarily frequency-modulatd ...
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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.
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