Download or read book Design and Analysis of Diffractive Optical Elements for Beamshaping of Gaussian Profiles and Emission from Multimode of VCSELs and RCLEDs written by John Stuart Hoch and published by . This book was released on 1996 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1997 with total page 806 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design and Fabrication of Diffractive Optical Elements for Micro beam Shaping written by Shaohua Tao and published by . This book was released on 2005 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis and Optimal Design of Diffractive Optical Elements written by Svetlana Rudnaya and published by . This book was released on 1999 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design Analysis and Optimization of Diffractive Optical Elements Under High Numerical Aperture Focusing written by Toufic G. Jabbour and published by . This book was released on 2009 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt: The demand for high optical resolution has brought researchers to explore the use of beam shaping diffractive optical elements (DOEs) for improving performance of high numerical aperture (NA) optical systems. DOEs can be designed to modulate the amplitude, phase and/or polarization of a laser beam such that it focuses into a targeted irradiance distribution, or point spread function (PSF). The focused PSF can be reshaped in both the transverse focal plane and along the optical axis. Optical lithography, microscopy and direct laser writing are but a few of the many applications in which a properly designed DOE can significantly improve optical performance of the system. Designing DOEs for use in high-NA applications is complicated by electric field depolarization that occurs with tight focusing. The linear polarization of off-axis rays is tilted upon refraction towards the focal point, generating additional transverse and longitudinal polarization components. These additional field components contribute significantly to the shape of the PSF under tight focusing and cannot be neglected as in scalar diffraction theory. The PSF can be modeled more rigorously using the electromagnetic diffraction integrals derived by Wolf, which account for the full vector character of the field. In this work, optimization algorithms based on vector diffraction theory were developed for designing DOEs that reshape the PSF of a 1.4-NA objective lens. The optimization techniques include simple exhaustive search, iterative optimization (Method of Generalized Projections), and evolutionary computation (Particle Swarm Optimization). DOE designs were obtained that can reshape either the transverse PSF or the irradiance distribution along the optical axis. In one example of transverse beam shaping, all polarization components were simultaneously reshaped so their vector addition generates a focused flat-top square irradiance pattern. Other designs were obtained that can be used to narrow the axial irradiance distribution, giving a focused beam that is superresolved relative to the diffraction limit. In addition to theory, experimental studies were undertaken that include (1) fabricating an axially superresolving DOE, (2) incorporating the DOE into the optical setup, (3) imaging the focused PSF, and (4) measuring aberrations in the objective lens to study how these affect performance of the DOE.
Download or read book American Doctoral Dissertations written by and published by . This book was released on 1996 with total page 872 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Diffractional Optics of Millimetre Waves written by I.V. Minin and published by CRC Press. This book was released on 2004-09-01 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: Diffractional Optics of Millimetre Waves combines those elements of diffraction theory normally associated with optics, including Gaussian beams, lenses, and mirrors, and extends them into the micro- and millimetre wavelength range. In this regime there are a number of applications in devices, such as automobile proximity sensors, satellite-TV receiving antennae, and non-destructive testing systems. Researchers working in these areas would benefit from greater understanding of the diffraction phenomena involved. A translated and updated version of the authors' book Diffraction Quasioptics, this book will present results formerly unavailable in the general literature.
Download or read book Design and Analysis of Finite Aperture Diffractive Optical Elements written by Stephen Douglas Mellin and published by . This book was released on 2001 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Methods for Computer Design of Diffractive Optical Elements written by Soifer and published by . This book was released on 2002-03-01 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rigorous Analysis and Design of Diffractive Optical Elements written by Jianhua Jiang and published by . This book was released on 2000 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Diffractive Optical Elements for Coherent Beam Addition written by M. Gamal Moharam and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Low data Simulation of Diffractive Optical Elements Based on the Zones Geometry written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Design and simulation of two-dimensional diffractive optical elements are often limited by the amount of data required to represent the element in the computer's memory. We present a technique based on a geometrical description of the element, which requires fewer data than the traditional pixel description. Moreover, the element is being described more accurately and consequently the pixel-related artefacts are suppressed. This technique can be used for both periodic and non-periodic structures of large dimensions under Fraunhofer or Fresnel approximations. We apply the method to analysis of far-field beam-shaping elements and discuss possible extensions and refinements of the technique.
Download or read book Design Fabrication and Characterization of Small Diffractive Optical Elements written by Xiang Gao and published by . This book was released on 2000 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Diffractive and Holographic Device Technologies and Applications V written by Ivan Cindrich and published by SPIE-International Society for Optical Engineering. This book was released on 1998 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: The applications of diffraction and holographic device technologies are the focus of this text. The 26 papers examine aspects such as theory and design, diffraction/holographic elements of materials and fabrications, and devices with diffractive methods.
Download or read book Diffractive and Holographic Device Technologies and Applications written by and published by . This book was released on 1997 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis of Finite Diffractive Optical Elements written by Jon M. Bendickson and published by . This book was released on 2000 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Diffractive Optical Element Beam Shaper written by Donald C. O'Shea and published by . This book was released on 1993 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:
