The Experts below are selected from a list of 14499 Experts worldwide ranked by ideXlab platform
Nikolay Lvovich Kazanskiy - One of the best experts on this subject based on the ideXlab platform.
-
Design of an axisymmetrical refractive Optical Element generating required illuminance distribution and wavefront.
Journal of The Optical Society of America A-optics Image Science and Vision, 2018Co-Authors: Leonid L. Doskolovich, Dmitry A. Bykov, Kseniya V. Andreeva, Nikolay Lvovich KazanskiyAbstract:The design of an axisymmetrical refractive Optical Element transforming a given incident beam into an output beam with prescribed illuminance distribution and wavefront is considered. The wavefront of the output beam is represented by the eikonal function defined in a certain plane behind the Optical Element. The design of the Optical Element is reduced to the solution of two explicit ordinary differential equations of the first order. These equations can be easily integrated using conventional numerical methods. As examples, we consider the design of two Optical Elements transforming a spherical beam from a point Lambertian light source into the uniform-illuminance beams with a plane wavefront and with a complex wavefront providing the subsequent focusing into a line segment on the Optical axis.
-
Determination the allowable error to adjustment of a diffractive Optical Element and the accuracy demanded to set the parameters of the focused beam
Optical Technologies for Telecommunications 2016, 2017Co-Authors: Serguei P. Murzin, Nikolay Lvovich KazanskiyAbstract:Diffractive Optical Elements capable of transforming the wavefront in a predetermined manner, with high efficiency may be apply in recording systems and reading information, and also its transmission in the Optical range. To improve the efficiency use of diffractive Optical Elements is expedient to determine the requirements for their adjustment and the accuracy of beam setting parameters forming. As an example, considered the use of a diffractive Optical Element for transmitting high-power laser beam for the purpose to conducting the appropriate heat treatment of the process object. It was determined that the permissible error of alignment of the Optical Element is no more ΔU1 = ΔV = 0.18·10-3 m, the accuracy of the focused beam parameters should not be lower ΔrΦ/rΦ = 3.1 %; ΔRΦ/RΦ = 2%, and the permissible value of rotation angle Φ error of the diffractive Optical Element is ΔΦ = 2.30. To solve this problem a diffractive Optical Element is characterized by adequate values of allowable errors. Keywords: diffractive Optical Element, laser beam, adjustment, accuracy
-
Design of an Optical Element forming an axial line segment for efficient LED lighting systems
Opt Express, 2013Co-Authors: E R Aslanov, E. A. Bezus, Leonid L. Doskolovich, Mikhail A. Moiseev, Nikolay Lvovich KazanskiyAbstract:An LED Optical Element is proposed as an alternative to cold-cathode fluorescent lamps. The Optical Element generates two symmetric uniformly illuminated line segments on the diffuse reflector. The illuminated segments then act as secondary linear light sources. The calculation of the Optical Element is reduced to the integration of the system of two explicit ordinary differential equations. The results of the simulation of an illumination system module consisting of a set of Optical Elements generating a set of line segments on the surface of the diffuse reflector are presented. The Elements are located directly on the surface of the reflector. The simulation results demonstrate the uniform illumination of a rectangular area at a distance of 30-40 mm from the light source plane. The lighting efficiency of the designed system exceeds 83%.
Hualiang Zhang - One of the best experts on this subject based on the ideXlab platform.
-
Holographic fabrication of nanoantenna templates through a single reflective Optical Element.
Applied Optics, 2015Co-Authors: David George, Jeffrey Lutkenhaus, Jun Ding, Hualiang Zhang, Usha PhiliposeAbstract:In this paper, we present a single reflective Optical Element-based approach for the control of laser phase, polarization, and beam intensity for the holographic fabrication of nanoantenna templates. The single Optical Element can be designed and printed precisely by a 3D printer. The holographic fabrication is demonstrated in both negative and positive photoresists. The pattern fabricated is in agreement with simulations. The control of the nanogap size of nanoantennas is discussed in terms of the capabilities of the single-Optical-Element approach.
-
Holographic fabrication of nano-Optical devices using single reflective Optical Element
Advanced Fabrication Technologies for Micro Nano Optics and Photonics VI, 2013Co-Authors: Jeffrey Lutkenhaus, David George, David Garrett, Hualiang ZhangAbstract:Abstract: Here we present holographic fabrications of large area nano-Optical device templates, including nano-antenna and photonic quasi-crystals using a single reflective Optical Element (ROE) through single beam and a single exposure process. These ROEs consist of several silicon wafers arranged with 5 or 6-fold symmetry, supported by two plastic platforms. By changing the polarization of the incident beam, various photonic quasi-crystal including spiral quasicrystals can be fabricated using the 5-fold symmetrically arranged Optical Element. Using the single Optical Element with silicon chips arranged in 6-fold symmetry, large areas of nano gap arrays can be fabricated holographically. These nanogaps and their shapes can be controlled through the phase delay of one laser beam. The nano gap arrays will be used for fabrication of nano-antennas arrays after metal depositions.
Aijun Zeng - One of the best experts on this subject based on the ideXlab platform.
-
Measurement of surface form deviation of the plane Optical Element using grid line method
Optik, 2010Co-Authors: Xiaojun Jiang, Huijie Huang, Xiangzhao Wang, Aijun ZengAbstract:A method for automatically measuring the surface form deviation of the plane Optical Element is presented. It uses the image pre-processing technique to obtain the centerlines of the interference fringes, the grid line technique to search the average fringe spacing and the maximum curvature of the interference fringes, and the normalization to obtain the value of surface form deviation of the Optical Element. The experimental results show that the measuring precision of the surface form deviation of the plane Optical Element reaches the value of 0.1 and the method improves the adaptation capability of processing the interference fringes, which indicates that the method can substitute the visual interpretation of interference fringes in high-noise workshop environment.
Hong Xiao-ou - One of the best experts on this subject based on the ideXlab platform.
-
Study on Obtaining the Surface form Deviation of the Plane Optical Element
Journal of the University of Electronic Science and Technology of China, 2020Co-Authors: Hong Xiao-ouAbstract:A method of obtaining the surface form deviation of the plane Optical Element by using BP neural network is presented. The curvatures of the interference fringes and the values of the fringe spacing of tested zones in the interferogram are determined,and the BP neural network is trained to obtain the value of light ring of the plane Optical Element. It is found that the test results obtained by Zygo interferometer are consistent with the test results obtained by the proposed method. Experimental results show that the method can enhance the adaptation capability of processing the interferograms and improve the measuring precision of the plane Optical Element.
David George - One of the best experts on this subject based on the ideXlab platform.
-
Holographic fabrication of nanoantenna templates through a single reflective Optical Element.
Applied Optics, 2015Co-Authors: David George, Jeffrey Lutkenhaus, Jun Ding, Hualiang Zhang, Usha PhiliposeAbstract:In this paper, we present a single reflective Optical Element-based approach for the control of laser phase, polarization, and beam intensity for the holographic fabrication of nanoantenna templates. The single Optical Element can be designed and printed precisely by a 3D printer. The holographic fabrication is demonstrated in both negative and positive photoresists. The pattern fabricated is in agreement with simulations. The control of the nanogap size of nanoantennas is discussed in terms of the capabilities of the single-Optical-Element approach.
-
Holographic fabrication of nano-Optical devices using single reflective Optical Element
Advanced Fabrication Technologies for Micro Nano Optics and Photonics VI, 2013Co-Authors: Jeffrey Lutkenhaus, David George, David Garrett, Hualiang ZhangAbstract:Abstract: Here we present holographic fabrications of large area nano-Optical device templates, including nano-antenna and photonic quasi-crystals using a single reflective Optical Element (ROE) through single beam and a single exposure process. These ROEs consist of several silicon wafers arranged with 5 or 6-fold symmetry, supported by two plastic platforms. By changing the polarization of the incident beam, various photonic quasi-crystal including spiral quasicrystals can be fabricated using the 5-fold symmetrically arranged Optical Element. Using the single Optical Element with silicon chips arranged in 6-fold symmetry, large areas of nano gap arrays can be fabricated holographically. These nanogaps and their shapes can be controlled through the phase delay of one laser beam. The nano gap arrays will be used for fabrication of nano-antennas arrays after metal depositions.
