Critical imaging parameters in time resolved digital image correlation (TRDIC): effect of optical blur during drop test on composite structures

Ahmed Boukar; Patrick Ienny; Stephane Corn; Pierre R. L. Slangen

doi:10.1117/12.2593708

20 June 2021 Critical imaging parameters in time resolved digital image correlation (TRDIC): effect of optical blur during drop test on composite structures

Ahmed Boukar, Patrick Ienny, Stephane Corn, Pierre R. L. Slangen

Author Affiliations +

Proceedings Volume 11782, Optical Measurement Systems for Industrial Inspection XII; 117820B (2021) https://doi.org/10.1117/12.2593708
Event: SPIE Optical Metrology, 2021, Online Only

Abstract

High speed imaging is applied for drop test on composite samples. The effect of optical blur on image correlation accuracy is described. Blur magnitude is tuned by decreasing the exposure time (at constant sensor sensitivity) for the same drop test series on flyspecked composite plates, while focus, aperture and 1:1 magnification are kept constant. Frame rate (80- 20kfps) and lighting are changed while keeping the same image contrast. Results show correlation quality is already altered with subpixel blur. This study enables to define blur criterion in high-speed imaging and completes study about sampling rate effect in time resolved image correlation by high-speed imaging.

Conference Presentation

Citation Download Citation

Ahmed Boukar, Patrick Ienny, Stephane Corn, and Pierre R. L. Slangen "Critical imaging parameters in time resolved digital image correlation (TRDIC): effect of optical blur during drop test on composite structures", Proc. SPIE 11782, Optical Measurement Systems for Industrial Inspection XII, 117820B (20 June 2021); https://doi.org/10.1117/12.2593708

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