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Light Simulation with Participating Media - HAL
Light Simulation with Participating Media - HAL

... This research project takes place in INRIA research center (Institut National de Recherche en Informatique et en Automatique). INRIA is a research institute whose purpose is to cover the whole fields of applied mathematics and computer science. The teams of this institute regroup 1800 researchers as ...
Full Article PDF
Full Article PDF

Coupling to aeroGAIN-ROD fibers
Coupling to aeroGAIN-ROD fibers

Specifying an Aspheric Surface
Specifying an Aspheric Surface

... that handle the powerful laser pulses in laser fusion. Many military and commercial aircraft applications demand aspheric surface implementation for high-precision DoD projects, Head Up Displays (HUDs), and for the high-resolution images used in flight simulators. Today, with significant development ...
surface topology reconstruction from the white light interferogram by
surface topology reconstruction from the white light interferogram by

... its estimates. However, in order to reconstruct the surface profile it is sufficient to determine only one model parameter – a  set of instantaneous frequencies – and then calculate the full phase of the carrier. Therefore, there is no need to calculate the three remaining parameters and reconstruct ...
Lasers incorporating 2D photonic bandgap mirrors
Lasers incorporating 2D photonic bandgap mirrors

... the long wavelength range to minimise transmission loss in 1.3 or 1 . 5 5 optical ...
Understanding the concept of resolving power in the Fabry–Perot
Understanding the concept of resolving power in the Fabry–Perot

Optical simulation of phosphor layer of white LEDs
Optical simulation of phosphor layer of white LEDs

THE FARADAY AND KERR EFFECTS The Faraday and Kerr Effects
THE FARADAY AND KERR EFFECTS The Faraday and Kerr Effects

... throughout the 1800s. In 1845, in attempt to determine whether the polarity of light was affected by strong electric fields when passed through a transparent insulator, Faraday failed to detect any changes and turned his efforts toward magnetic fields. In due course, Faraday successfully found that ...
Flow Cytometry and Sorting, Part 1
Flow Cytometry and Sorting, Part 1

Using the Spectrophotometer
Using the Spectrophotometer

Part 4 - MZA Associates Corporation
Part 4 - MZA Associates Corporation

... Modeling Localized Optical Effects In wave optics simulation all optical effects, with the sole exception of optical propagation through vacuum or an ideal dielectric medium, are modeled as if they occurred at discrete planes. This is an approximation of course, since many important effects, such a ...
Predicting the Appearance of Materials Using Lorenz
Predicting the Appearance of Materials Using Lorenz

Sagnac-loop phase shifter with polarization
Sagnac-loop phase shifter with polarization

... block of photonic technologies, in particular in optical communications [1], [2]. For most typical applications, the devices work for only one particular polarization and can tolerate large insertion losses. The situation is very different in quantum information science. Here, losses are much more i ...
May2016
May2016

... -04c. Write short notes on any One:-03i. Techniques to improve public speaking ii. Role played by Eye-Contact in nonverbal communication d. State true or false:- 03i. Acting is a form of communication ii. The meaning of message is not in words ...
On the chromatic aberration of microlenses
On the chromatic aberration of microlenses

... The refractive index of any transparent material is function of the wavelength. Therefore, a lens made in one single material shows different positions of focus at each wavelength. The difference in position of these focal points is known as the longitudinal primary chromatic aberration [1]. To corr ...
Absorption Enhancement in Ultrathin Crystalline Silicon Solar Cells
Absorption Enhancement in Ultrathin Crystalline Silicon Solar Cells

... are shown in Figures 1b and 2b, respectively. The periodicity of the nanocone grating is 500 nm, and the height is 900 nm, four times the base radius of 225 nm. The planar part of the structure has a thickness of 1809 nm. Comparing the absorption spectrum of such an optimized “top-only” structure (s ...
How Do Lenses and Mirrors Affect Light?
How Do Lenses and Mirrors Affect Light?

Sample Pages
Sample Pages

... sin θ  NA  ncore  ncladding ...
Some Basics 5.1.3 Basic Wave Optics
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... optical apparatus is clear and encompasses a lot of intricate and very advanced topics in optics, e.g. how to make structures on microelectronic chips with lateral dimensions around 30 nm < λ with optical lithography. Now we consider step 2: two waves can interfere with one another. The principle as ...
Reversing Light: Negative Refraction
Reversing Light: Negative Refraction

... represent a good starting point to implement negative index materials. In his early paper, Veselago noted that a negative index focusing lens would need to be concave rather than convex. This would seem to be a trivial matter, but there is, in fact, more to the story. For thin lenses, geometrical op ...
Get PDF - OSA Publishing
Get PDF - OSA Publishing

... frames of typical 3D shape results from 0.00s to 0.40s with an interval of 0.05s are shown in Fig. 7, from which the dynamic water wave spreading can been nicely demonstrated. Since the monoscopic fringe reflection technique and the 2D WFR method are adopted, this approach is more suitable to sense ...
Optics of a Faraday
Optics of a Faraday

... coefficients a J and b J and by M 5 1. Because of rotational invariance of the scatterer, it is clear that the final result depends only on the scattering angle u, which is the angle between k and k8 (see Fig. 1). Therefore we obtain in the circular basis (associated with the indices s and s 8 ) ...
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Space-Time-Wavelength Mapping Based

< 1 ... 51 52 53 54 55 56 57 58 59 ... 145 >

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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