Design and Analysis of Finite Aperture Diffractive Optical Elements PDF Download

Author: Stephen Douglas Mellin
Publisher:
ISBN:
Category : Diffraction gratings
Languages : en
Pages : 428

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Author: Donald C. O'Shea
Publisher: SPIE Press
ISBN: 9780819451712
Category : Science
Languages : en
Pages : 266

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Book Description
This book provides the reader with the broad range of materials that were discussed in a series of short courses presented at Georgia Tech on the design, fabrication, and testing of diffractive optical elements (DOEs). Although there are not long derivations or detailed methods for specific engineering calculations, the reader should be familiar and comfortable with basic computational techniques. This text is not a 'cookbook' for producing DOEs, but it should provide readers with sufficient information to assess whether this technology would benefit their work, and to understand the requirements for using the concepts and techniques presented by the authors.

Author: Jon M. Bendickson
Publisher:
ISBN:
Category : Optics
Languages : en
Pages : 490

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Book Description

Author: Shanti Bhattacharya
Publisher: SPIE-International Society for Optical Engineering
ISBN: 9781510607057
Category : Diffraction
Languages : en
Pages : 276

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Book Description
"Given the many different applications and uses of diffractive optics, the importance of this field cannot be underestimated. This book supplements the available literature on diffractive optic elements (DOEs) by equipping readers with the skills to begin designing, simulating, and fabricating diffractive optics. The design of DOEs is presented with simple equations and step-by-step procedures for simulation--from the simplest 1D grating to the more complex multifunctional DOEs--and analyzing their diffraction patterns using MATLAB. The fundamentals of fabrication techniques such as photolithography, electron beam lithography, and focused ion beam lithography with basic instructions for the beginner are presented. Basic error analysis and error-correction techniques for a few cases are also discussed. The contents of all the chapters are supported throughout by practical exercises and clearly commented MATLAB® codes (the codes are also on an accompanying CD), making this book useful even to a novice programmer"--

Author: John Stuart Hoch
Publisher:
ISBN:
Category :
Languages : en
Pages : 302

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Author: Svetlana Rudnaya
Publisher:
ISBN:
Category :
Languages : en
Pages : 198

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Author: Toufic G. Jabbour
Publisher:
ISBN:
Category : Beam optics
Languages : en
Pages : 147

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Book Description
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.

Author: Grigoriĭ Isaevich Greĭsukh
Publisher: SPIE Press
ISBN: 9780819424518
Category : Science
Languages : en
Pages : 418

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Book Description
The use of diffractive and gradient-index (GRIN) lenses as components of imaging optical systems has been investigated for several decades. The elements have proved competitive in their unique focusing and aberration properties and in terms of their additional degrees of freedom for optical design. This book systematically examines the physical principles of diffractive and GRIN elements.

Author: Eric Gordon Johnson
Publisher:
ISBN:
Category : Holography
Languages : en
Pages : 268

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Author: Jianhua Jiang
Publisher:
ISBN:
Category : Diffraction gratings
Languages : en
Pages : 314

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Book Description