Characterization of gradient index optical components using experimental ray tracing

Binkele, Tobias; Dylla‐Spears, Rebecca; Johnson, Michael; Hilbig, David; Essameldin, Mahmoud; Henning, Thomas; Fleischmann, Friedrich

doi:10.1117/12.2511072

Cited by 4 publications

(4 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A number of schemes for DM in transmission have been proposed in the metrology (Kafri and Glatt, 1985;Massig, 1999;Canabal and Alonso, 2002;Vargas et al, 2010;Atcheson, 2012;Mériaudeau, 2012;Fischer, 2016;Li et al, 2018a;Wang et al, 2018;Binkele et al, 2019;Wang et al, 2020;Wang C. et al, 2021) as well as in the computer vision (Trifonov et al, 2006;Kutulakos and Steger, 2007;Yamazaki et al, 2007) communities, often under the title of "optical deflectometric tomography" (González et al, 2013;Sudhakar et al, 2015). Various proposed implementations use laser scanning, active and static patterns, distant detection (Fourier regime), etc.…”

Section: Deflectometry In Transmissionmentioning

confidence: 99%

Deflectometry for specular surfaces: an overview

et al. 2023

View full text Add to dashboard Cite

Deflectometry as a technique to assess reflective surfaces has now existed for some 40 years. Its different aspects and variations have been studied in multiple theses and research articles; reviews are available for certain subtopics. Still a field of active development with many unsolved problems, deflectometry now encompasses a large variety of application domains, hardware setup types, and processing workflows for different purposes, and spans a range from qualitative defect inspection of large vehicles to precision measurements of microscopic optics. Over these years, many exciting developments have accumulated in the underlying theory, in the systems design, and in the implementation specifics. This diversity of topics is difficult to grasp for experts and non-experts alike and may present an obstacle to a wider acceptance of deflectometry as a useful tool for research and industrial applications. This paper presents an attempt to summarize the status of deflectometry and to map relations between its notable branches. Its aim is to provide a communication basis for experienced practitioners and also to offer a convenient entry point for those interested in learning about the method. The list of references introduces some prominent trends and established research groups in order to facilitate further self-directed exploration.

show abstract

Section: Deflectometry In Transmissionmentioning

confidence: 99%

Deflectometry for specular surfaces: an overview

et al. 2023

View full text Add to dashboard Cite

show abstract

“…A number of schemes for DM in transmission have been proposed in the metrology [68][69][70][71][72][73][74][75][76][77][78][79] as well as in the computer vision [80][81][82] communities, often under the title of "optical deflectometric tomography" [83,84]. Various proposed implementations employ laser scanning, active and static patterns, distant detection (Fourier regime), etc.…”

Section: Deflectometry In Transmissionmentioning

confidence: 99%

Deflectometry for specular surfaces: an overview

Burke¹,

Pak²,

Höfer³

et al. 2022

Preprint

View full text Add to dashboard Cite

Deflectometry as a technical approach to assessing reflective surfaces has now existed for almost 40 years. Different aspects and variations of the method have been studied in multiple theses and research articles, and reviews are also becoming available for certain subtopics. Still a field of active development with many unsolved problems, deflectometry now encompasses a large variety of application domains, hardware setup types, and processing workflows designed for different purposes, and spans a range from qualitative defect inspection of large vehicles to precision measurements of microscopic optics. Over these years, many exciting developments have accumulated in the underlying theory, in the systems design, and in the implementation specifics. This diversity of topics is difficult to grasp for experts and nonexperts alike and may present an obstacle to a wider acceptance of deflectometry as a useful tool in other research fields and in the industry.This paper presents an attempt to summarize the status of deflectometry, and to map relations between its notable "spin-off" branches. The intention of the paper is to provide a common communication basis for practitioners and at the same time to offer a convenient entry point for those interested in learning and using the method. The list of references is extensive but definitely not exhaustive, introducing some prominent trends and established research groups in order to facilitate further selfdirected exploration by the reader.

show abstract

“…This problem is overcome for known surfaces by considering the expected known model for the evaluation. For unknown surfaces, the field of view can be changed in a way that the deviations are irrelevant (Binkele et al, 2019b). Having the actual points of reflection determined, a Cartesian coordinate system with the axis x, y and z is introduced to transfer the detected surface normal g = (g x , g y , g z ) T into the surface slopes:…”

Section: Measurement Techniquementioning

confidence: 99%

Characterization of specular freeform surfaces from reflected ray directions using experimental ray tracing

Binkele

Hilbig

Essameldin

et al. 2021

J. Sens. Sens. Syst.

Self Cite

View full text Add to dashboard Cite

Abstract. The applications of freeform surfaces in optical components and systems are increasing more and more. Therefore, appropriate measurement techniques are needed to measure these freeform surfaces for verification. This task is still a challenge for most measurement techniques. In this paper, we propose a measurement technique for optical and other specular freeform surfaces based on experimental ray tracing. This technique is able to measure form and mid-spatial-frequency deviations simultaneously. The focus will be set on the sensing technique and the measurement uncertainties in the setup. As the measurement technique is described, an estimation of the influence of different uncertainties based on simulations is given. The result from an experimental measurement is evaluated in relation to the influence of the uncertainties. A comparison measurement for evaluation is given.

show abstract

Characterization of gradient index optical components using experimental ray tracing

Cited by 4 publications

References 14 publications

Deflectometry for specular surfaces: an overview

Deflectometry for specular surfaces: an overview

Deflectometry for specular surfaces: an overview

Characterization of specular freeform surfaces from reflected ray directions using experimental ray tracing

Contact Info

Product

Resources

About