Non-planar illumination sources for deflectometry

Henry Quach, Hyukmo Kang, Heejoo Choi, Dae Wook Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations


We introduce the design of a highly compact, non-planar illumination source for deflectometry. The source emits uniform and Lambertian light from a curved area resembling the inner bore of a cylinder. When equipped with motion hardware, the ring source behaves like a spatially modulated screen with a pixel pitch comparable to that of a typical LCD monitor. If this source, a detector, and test optic are coaxially aligned, then on-axis deflectometry measurements are possible for axicons and centrally obscured, convex optics. This paper highlights the illumination design behind a cylindrical ring source and its implementation as a prototype in the visible spectrum.

Original languageEnglish (US)
Title of host publicationOptical Manufacturing and Testing XIII
EditorsDae Wook Kim, Rolf Rascher
ISBN (Electronic)9781510637801
StatePublished - 2020
EventOptical Manufacturing and Testing XIII 2020 - Virtual, Online, United States
Duration: Aug 24 2020Sep 4 2020

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceOptical Manufacturing and Testing XIII 2020
Country/TerritoryUnited States
CityVirtual, Online


  • Convex Optics
  • Deflectometry
  • Ray Recirculation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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