Quality control of Fresnel lens molds using deflectometry

Kiefel, Peter; Nitz, Peter

doi:10.1063/1.4962086

Cited by 3 publications

(1 citation statement)

References 7 publications

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“…Today, different versions of DM are employed in a wide range of applications, such as industrial quality control for household items, mobile phones, automotive parts [6][7][8][9][10][11][12], reflective sheet, rod, or tape materials [13][14][15], Fresnel lenses [16,17], solar concentrator mirrors [18][19][20][21][22][23][24][25], and even astronomical and synchrotron mirrors of various sizes [26][27][28][29][30][31][32][33][34][35]. We have last summarized the state of the art over a decade ago [36,37]; driven by applications, the discipline has seen many exciting advances since then.…”

Section: Introductionmentioning

confidence: 99%

Deflectometry for specular surfaces: an overview

Burke¹,

Pak²,

Höfer³

et al. 2022

Preprint

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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.

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Section: Introductionmentioning

confidence: 99%

Deflectometry for specular surfaces: an overview

Burke¹,

Pak²,

Höfer³

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

Improving the quality of Fresnel VR lenses by creating extra room for trapped air and evaluating slope angle

Jiang,

Omuro,

She

et al. 2023

Optik

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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

Quality control of Fresnel lens molds using deflectometry

Cited by 3 publications

References 7 publications

Deflectometry for specular surfaces: an overview

Deflectometry for specular surfaces: an overview

Improving the quality of Fresnel VR lenses by creating extra room for trapped air and evaluating slope angle

Deflectometry for specular surfaces: an overview

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