Results 311 to 320 of about 6,802,009 (374)

Diffractive elements of variable optical power and high diffraction efficiency

Applied Optics, 1993
The generation of diffractive elements of variable optical parameters and high diffraction efficiency is presented. It can be realized by a superposition of two conjugate kinoforms. In particular, the method gives rise to zone plates of variable focusing power as well as to circular and linear gratings of variable deflection angles.
A, Kolodziejczyk, Z, Jaroszewicz
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Diffraction efficiency of holographic blazed diffraction gratings

Czechoslovak Journal of Physics, 1991
Holographic blazed diffraction grating is analysed as a periodic relief of an inclined sinusoidal curve in the shallow profile approximation. Under the condition that the rate of the development is a linear function of the development dose the evolution of the relief during the development is discussed.
I. Aubrecht, M. Miler
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Effects of diffraction efficiency on the modulation transfer function of diffractive lenses

Applied Optics, 1992
Diffractive lenses differ from conventional optical elements in that they can produce more than one image because of the presence of more than one diffraction order. These spurious, defocused images serve to lower the contrast of the desired image. We show that a quantity that we define as the integrated efficiency serves as a useful figure of merit to
D A, Buralli, G M, Morris
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Electrical bandwidth testing of an AOTF transducer as a function of the optical diffraction efficiency.

Journal of The Optical Society of America A-optics Image Science and Vision, 2019
The performance of an acousto-optical tunable filter (AOTF) depends on several key parameters, such as the diffraction efficiency and the applied RF signal at the external network of the transducer.
J. Vanhamel, E. Dekemper, V. Voloshinov, E. Neefs, D. Fussen   +4 more
semanticscholar   +1 more source

Enhanced diffraction efficiency of gratings in multilayers

Optics Letters, 2000
Computations with the rigorous differential method show that single gratings made by ion implantation have a diffraction efficiency in the +1 transmitted order under TE illumination of only 0.78%. The insertion of such gratings into multilayer dielectric Fabry-Perot cavities leads to an enhancement of the free-space diffraction efficiency.
L, Escoubas, F, Flory, F, Lemarchand, A, During, L, Roux   +4 more
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Performance of diffractive lenses with nonunity diffraction efficiency

Optical Society of America Annual Meeting, 1990
The unique optical properties of diffractive optical elements make them attractive candidates for a wide variety of applications. Unlike conventional optical elements, however, diffractive optics can simultaneously produce more than one image, resulting from the various diffracted orders.
Dale A. Buralli, G. Michael Morris
openaire   +1 more source

High-diffraction-efficiency pseudorandom encoding

Journal of the Optical Society of America A, 2000
Pseudorandom encoding (PRE) is a statistics-based procedure in which a pure-phase spatial light modulator (SLM) can yield, on the average, the prescribed diffraction pattern specified by the user. We seek to combine PRE with the optimization of an aperture-based target function.
Y, Yang, H, Stark, D, Gurkan, C L, Lawson, R W, Cohn   +4 more
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Enhancement of diffraction efficiency via higher-order operation of a multilayer blazed grating

Optics Letters, 2014
D L Voronov, Eric M Gullikson, F Salmassi   +2 more
exaly   +2 more sources

Tolerance analysis on diffraction efficiency and polychromatic integral diffraction efficiency for harmonic diffractive optics

SPIE Proceedings, 2016
In this dissertation, the mathematical model of effect of manufacturing errors including microstructure relative height error and relative width error on diffraction efficiency for the harmonic diffractive optical elements (HDEs) is set up. According to the expression of the phase delay and diffraction efficiency of the HDEs, the expression of ...
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Balancing diffraction efficiency and laser damage in diffractive optics

Optical Modeling and Performance Predictions IX, 2017
Diffractive optics enable applications requiring high power laser focusing and beam shaping. The ability of such components to resist damage is of mounting importance as lasers attain higher power levels. Diffractive optics inherently contain discontinuities that can enhance electric field distributions within the component. Researchers have previously
Steven T. Glass, Thomas J. Suleski
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