Phase measuring deflectometry with monoscopic active display registration

Yann Sperling; Ralf B. Bergmann

doi:10.1117/12.3015111

18 June 2024 Phase measuring deflectometry with monoscopic active display registration

Yann Sperling, Ralf B. Bergmann

Proceedings Volume 12997, Optics and Photonics for Advanced Dimensional Metrology III; 1299713 (2024) https://doi.org/10.1117/12.3015111
Event: SPIE Photonics Europe, 2024, Strasbourg, France

Abstract

Phase measuring deflectometry is a shape measurement technique for specular surfaces, based on the deflection of light rays coming from active patterns generated by a display. To obtain sufficient data for shape reconstruction, additional information must be provided for regularization. Active display registration is a regularization technique where the display is moved, and two cameras are used to register its position and shape using stereo matching. For measuring high curvature specular surfaces, the large field of view of both cameras must substantially overlap, which limits the setup geometry. In this work, we propose using only one camera for registration. We achieve this with an algorithm that utilizes a geometric model of the display. We show experimental results and compare both display registration methods.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Yann Sperling and Ralf B. Bergmann "Phase measuring deflectometry with monoscopic active display registration", Proc. SPIE 12997, Optics and Photonics for Advanced Dimensional Metrology III, 1299713 (18 June 2024); https://doi.org/10.1117/12.3015111

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