Non-planar illumination sources for deflectometry

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

doi:10.1117/12.2568168

20 August 2020 Non-planar illumination sources for deflectometry

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

Proceedings Volume 11487, Optical Manufacturing and Testing XIII; 114870L (2020) https://doi.org/10.1117/12.2568168
Event: SPIE Optical Engineering + Applications, 2020, Online Only

Abstract

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.

Conference Presentation

Citation Download Citation

Henry Quach, Hyukmo Kang, Heejoo Choi, and Dae Wook Kim "Non-planar illumination sources for deflectometry", Proc. SPIE 11487, Optical Manufacturing and Testing XIII, 114870L (20 August 2020); https://doi.org/10.1117/12.2568168

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