Published by De Gruyter

Volume 5 Issue 3 - Aspheric optics / Guest Editors: Sven Kiontke and Santiago Royo

Issue of Advanced Optical Technologies

Contents
Journal Overview

Publicly Available July 6, 2016

Community

Publicly Available June 24, 2016

News from the European Optical Society

Page range: 187-188

Download PDF

Publicly Available June 30, 2016

Conference Notes

Page range: 189-193

Download PDF

Publicly Available June 29, 2016

Topical issue: Aspheric optics

Editorial

Publicly Available June 29, 2016

Aspheric optics: from design to manufacturing and aspheric metrology

Michael M. Pfeffer

Page range: 199-200

Download PDF

Tutorial

July 6, 2016

Exploring the unlimited possibilities of modular aspheric Gauss to top-hat beam shaping

Anna Möhl, Ulrike Fuchs

Page range: 201-210

Abstract

Beam shaping is a field of research with growing importance. Therefore, a new refractive beam shaping system is presented. The knowledge gained from analyzing patent systems was used to derive our own improved design. It is compared to a patent system, and some selected results are presented in this work. Furthermore, possibilities to scale the entrance and exit beam diameters with the help of SPA™ Beam Expander Kit and SPA™ AspheriColl (both from asphericon GmbH, Jena, Germany) are shown, so that a modular top-hat generation is achievable. Additionally, the large spectral range in which the beam shaping system is applicable is demonstrated, and it is demonstrated how the beam shaping system can be used to improve the performance of other optical elements that require a top-hat beam profile.

Review Articles

Publicly Available May 27, 2016

Metrology for the production process of aspheric lenses

Andreas Beutler

Page range: 211-228

More Download PDF

Abstract

Metrology revealing the form deviation of an aspheric surface is a fundamental part of all different production processes of aspheric lenses. Different processing steps have different requirements for the production. A selection of measuring instruments commonly applied in these processes is presented. This contains tactile and optical pointwise measuring instruments and laser interferometer systems. The principle functionality and the properties are presented. An overview of the application of these systems in different production processes is given. In order to show comparability, measuring results of the different types of systems are presented.

June 25, 2016

Breathing life into aspheric dreams

Ulrike Fuchs, Sven R. Kiontke

Page range: 229-235

Abstract

Introducing aspheric lenses in optical design broadens the horizons of possibilities and opens up new way to correct aberrations or creating effects that are not possible otherwise. Manufacturing these aspheric surfaces has come a long way during the last 15 years. This article discusses the state of the art concerning optical design, manufacturing, surface form tolerances and roughness to show the possibilities in hand.

Research Articles

May 16, 2016

Ray selection for optimization of rotationally symmetric systems

Greg W. Forbes, Johannes Ruoff, Andreas Flesch, Norbert Kerwien

Page range: 237-247

Abstract

Efficient performance assessment is essential during the design of systems involving complex aspheres. We present new classes of pupil sampling schemes that, with a reduced number of rays, yield accurate estimates of the RMS wavefront aberration over a circular pupil. It turns out that the number of samples in the pupil can be reduced by a factor of about 0.7, and these ideas can also be expected to lead to a similar additional reduction factor when averaging over the field and color. Beyond that, analysis of a patented lens system is used to establish the path to further significant reductions.

July 6, 2016

Simulation of imperfections in plastic lenses – transferring local refractive index changes into surface shape modifications

Josep Arasa, Carles Pizarro, Patricia Blanco

Page range: 249-258

Abstract

Injection molded plastic lenses have continuously improved their performance regarding optical quality and nowadays are as usual as glass lenses in image forming devices. However, during the manufacturing process unavoidable fluctuations in material density occur, resulting in local changes in the distribution of refractive index, which degrade the imaging properties of the polymer lens. Such material density fluctuations correlate to phase delays, which opens a path for their mapping. However, it is difficult to transfer the measured variations in refractive index into conventional optical simulation tool. Thus, we propose a method to convert the local variations in refractive index into local changes of one surface of the lens, which can then be described as a free-form surface, easy to introduce in conventional simulation tools. The proposed method was tested on a commercial gradient index (GRIN) lens for a set of six different object positions, using the MTF sagittal and tangential cuts to compare the differences between the real lens and a lens with homogenous refractive index, and the last surface converted into a free-form shape containing the internal refractive index changes. The same procedure was used to reproduce the local refractive index changes of an injected plastic lens with local index changes measured using an in-house built polariscopic arrangement, showing the capability of the method to provide successful results.

Research Article

May 9, 2016

Telecentric line scanning system based on a ring surface mirror for inline processes

Florian Loosen, Norbert Lindlein, Klaus Donner

Page range: 259-264

Abstract

In many industrial applications, an inline measurement of a production process poses a difficult challenge for any optical system. Therefore, telecentric optical systems are being used to ensure an independence of the magnification of the object from the working distance. Usually, telecentric optical systems are impractical for inline applications with large objects due to the size of the telecentric optical system, which has to be larger than the object. Therefore, a new approach of telecentric line scanning systems was developed to gain access to this advantage.

About this journal

Objective

Advanced Optical Technologies is a strictly peer-reviewed scientific journal. The major aim of Advanced Optical Technologies is to publish recent progress in the fields of optical design, optical engineering, and optical manufacturing. Advanced Optical Technologies has a main focus on applied research and addresses scientists as well as experts in industrial research and development.

Advanced Optical Technologies partners with the European Optical Society (EOS). All its 4.500+ members have free online access to the journal through their EOS member account.

Topics

Optical design
Lithography
Opto-mechanical engineering
Illumination and lighting technology
Precision fabrication
Image sensor devices
Optical materials (polymer based, inorganic, crystalline/amorphous)
Optical instruments in life science (biology, medicine, laboratories)
Optical metrology
Optics in aerospace/defense
Simulation, interdisciplinary
Optics for astronomy
Standards
Consumer optics
Optical coatings

Article formats
Tutorial, Review Article, Research Article, Letter, Short Communication, Views

> Information on submission process

Volume 5 Issue 3 - Aspheric optics / Guest Editors: Sven Kiontke and Santiago Royo

Issue of Advanced Optical Technologies

Cover and Frontmatter

News from the European Optical Society

Conference Notes

Conference Calendar

Editorial

Aspheric optics: from design to manufacturing and aspheric metrology

Tutorial

Exploring the unlimited possibilities of modular aspheric Gauss to top-hat beam shaping

Abstract

Review Articles

Metrology for the production process of aspheric lenses

Abstract

Breathing life into aspheric dreams

Abstract

Research Articles

Ray selection for optimization of rotationally symmetric systems

Abstract

Simulation of imperfections in plastic lenses – transferring local refractive index changes into surface shape modifications

Abstract

Telecentric line scanning system based on a ring surface mirror for inline processes

Abstract