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Unit 1.6 Optical Switching - DIT School of Electronics and
Unit 1.6 Optical Switching - DIT School of Electronics and

... * This parameter can be improved by using of anti-reflection coatings **Switching time for the Total Reflection switch can be improved by using FLCs ...
Review and Comparison of High
Review and Comparison of High

... noise, the conventional intensity-based pixel saturation identification method is sometimes susceptible, which determines the brightest intensity reaching the highest quantization level, for example, 255 for an 8-bit camera. Thus, the brightest intensity recorded in a pixel can be unstable and devia ...
chapter 6
chapter 6

... convergent lens. (A) - the object is between the lens and its front focal point, (B) - the object is far away in front of the front focal point. Consider the point A of a given object emitting light rays which refract through a lens to gather at the point A', called an image of the point A. Fig. 6.2 ...
Volume Holographic Recording and Readout for 90
Volume Holographic Recording and Readout for 90

... where k refers to a propagation constant of light in the material, to be made more precise later. Also, the angle of the grating vector is terms in the surviving Laplace variable. It is pointed outthat the inverse transformation of 2-D Laplace functions as derived here is rather difficult even under ...
Reversing Light: Negative Refraction
Reversing Light: Negative Refraction

... necessary for a passive material. This briefly stated argument shows why the material Veselago pondered years ago is so unique: the index of refraction is negative. A negative refractive index implies that the phase of a wave advancing through the medium will be negative rather than positive. As Ves ...
Modulation of spatial coherence of optical field by means of liquid
Modulation of spatial coherence of optical field by means of liquid

... As follows from Sec. 2, the modulation of spatial coherence may be achieved by transmitting the optical field through a thin diffusion screen with the complex amplitude transmittance which is randomly changed in time. Such a screen may be created in practice by means of the electrically controlled s ...


... 3] The effect of absorption and scattering of the light carrier signal (i. e. Laser) can be described by the path – dependent attenuation coefficient [4]. A laser communication system is advantageous to radio frequency communication systems for the following reasons: (i) no licensing requirements or ...
Panoramic Imaging with Horizontal Stereo - CS
Panoramic Imaging with Horizontal Stereo - CS

... This paper presents two possibilities for capturing stereo panoramic images using optics, without any moving parts. A special mirror is introduced such that viewing the scene through this mirror creates the same rays as those used with the rotating cameras. Such a mirror enables the capture of stere ...
Rayleigh scattering by gas molecules: why is the sky blue?
Rayleigh scattering by gas molecules: why is the sky blue?

Detecting tissue optical and mechanical properties with an
Detecting tissue optical and mechanical properties with an

... and a CCD camera (QImaging Retiga EXi, Surrey, BC, Canada) were positioned 32 mm apart on the same side of tissue mimicking phantoms to collect the backward scattered photons (see Fig. 1). A 5 MHz focused ultrasound transducer (Parametric NDT Videoscan 307, Olympus, Essex, UK) was used to deliver 2 ...
Phase-matching and nonlinear optical processes - jalali
Phase-matching and nonlinear optical processes - jalali

... the electronic IC industry, the quality of commercial SOI wafers continue to improve while the cost continues to decrease. This along with complete compatibility with silicon IC technology has been fueling interest in SOI integrated optics [1]. Compared to other integrated optics platforms, a distin ...


Michelson Interferometer
Michelson Interferometer

... towards the mirror M1 and the other half is transmitted towards mirror M2. Hence BS is known as a beam splitter. In case of sources which are not monochromatic, the glass plate CP is inserted between BS and M2. The role of CP is explained further in the following paragraph. After splitting, the two ...
Measurement of transparent plates with
Measurement of transparent plates with

Diffraction
Diffraction

... Now consider the case where a front smooth wave is running on a slit. If this slit is large compared to the wavelength of the light, the wave properties are not observable. Consequently, the slit must be in the order of magnitude of the wavelength of the light used. Now consider Figure 1.1. There, i ...
2 Pulsed Optics
2 Pulsed Optics

... k . Energy conservation implies that ω2 = 2ω, while momentum conservation yields k = k 1 + k 2 , k = 2k 1 or k = 2k 2 . Five rays therefore exit the doubling material: two rays are at the fundamental frequency ω in the directions k 1 and k 2 of the incident rays, and superimposed on them are two ray ...
Generation of lattices of optical vortices
Generation of lattices of optical vortices

... Optical vortices are intriguing objects that attract much attention1 and display fascinating properties with possible applications in the optical transmission of information and in guiding and trapping of particles. Vortices can be generated in several different controllable ways in lasers with larg ...
Two-dimensional modulational instability in photorefractive media M Saffman , Glen McCarthy
Two-dimensional modulational instability in photorefractive media M Saffman , Glen McCarthy

... ( = 0) and short Debye length (α = ξ = 0) limit. We also assumed the lack of a photogalvanic effect (E ph = 0). We used a split step fast Fourier transform code to solve the propagation equation (2) and a finite difference technique to find the electrostatic potential and refractive index change in ...
Simulation for the Evolution of the Australian Netting Spider PM Eye
Simulation for the Evolution of the Australian Netting Spider PM Eye

... The simulation of the netting spider eye is made in two steps. The first step calculates the variables for the refraction of the netting spider lens for the paraxial condition. The paraxial condition is linear and thus analytic. When a light ray is within 5 degrees of the optical axis, the paraxial ...
Optical amplifiers
Optical amplifiers

... EDFA, a beverage story continued An erbium doped fiber amplifier (EDFA) consists of a few meters of optical fiber doped with a few parts per million of the rare earth element erbium. The optical signal is injected into this fiber, along with the light from a special “pump” laser that is designed to ...
Lecture 16 - EECS @ UMich
Lecture 16 - EECS @ UMich

... EECS 598-002 Nanophotonics and Nanoscale Fabrication by P.C.Ku ...
Principles of optics
Principles of optics

... 10.2 A complex representation of real polychromatic ®elds 10.3 The correlation functions of light beams 10.3.1 Interference of two partially coherent beams. The mutual coherence function and the complex degree of coherence 10.3.2 Spectral representation of mutual coherence 10.4 Interference and diff ...
PDF
PDF

slac memorandum - Stanford Synchrotron Radiation Lightsource
slac memorandum - Stanford Synchrotron Radiation Lightsource

... masks that intercept any injected beam exiting the magnets, a coldfinger that removes most of the power from the SR beam by intercepting the middle portion of the fan, a mirror with a 9° incidence angle, an SR light pipe through the SPEAR concrete lateral wall, a single shutter, and a lead-lined box ...


... great thickness with the recording materials currently available. There are easy methods of preparation to achieve dry thick layers using photopolymers as holographic recording materials [4], but this thickness of materials not necessary implies a high effective optical thickness of material. In ot ...
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Nonimaging optics

Nonimaging optics (also called anidolic optics) is the branch of optics concerned with the optimal transfer of light radiation between a source and a target. Unlike traditional imaging optics, the techniques involved do not attempt to form an image of the source; instead an optimized optical system for optical radiative transfer from a source to a target is desired.
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