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Optical Engineering

CMOS and sCMOS imaging performance comparison by digital holographic interferometry
Author(s): Jorge Mauricio Flores-Moreno; Manuel H. De la Torre-Ibarra; María del Socorro Hernández-Montes; Carlos Perez Lopez; Fernando Mendoza-Santoyo
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Paper Abstract

We use a digital holographic interferometric setup to assess, as a proof of concept, two state-of-the-art sensors (CMOS and sCMOS cameras) that are widely used in nondestructive testing (NDT). This interferometric study is intended to evaluate the image quality recorded by any camera used in NDT. The assessing relies on the quantification of the optical phase information recovered by the cameras used for this study. For this, we calculate the signal-to-noise ratio, correlation coefficient, and quality index (Q-index) as main figures-of-merit. As far as we know, the Q-index has not been used for evaluation of the optical phase coming from image holograms. The CMOS and sCMOS sensors used record the same deformation event under the same experimental conditions. The experiment involves the inspection of a large sample (>1  m2 of area) which implies low illumination conditions for the imaging sensors. The retrieved CMOS optical phase shows artifacts that are not observed in the sCMOS. An analysis of these two groups of interferometric images is presented and discussed. The methodology set forth here can be applied to evaluate other sensors such as CCDs and EM-CCDs.

Paper Details

Date Published: 20 October 2016
PDF: 12 pages
Opt. Eng. 55(12) 121728 doi: 10.1117/1.OE.55.12.121728
Published in: Optical Engineering Volume 55, Issue 12
Show Author Affiliations
Jorge Mauricio Flores-Moreno, Centro de Investigaciones en Óptica, A.C. (Mexico)
Manuel H. De la Torre-Ibarra, Centro de Investigaciones en Óptica, A.C. (Mexico)
María del Socorro Hernández-Montes, Centro de Investigaciones en Óptica, A.C. (Mexico)
Carlos Perez Lopez, Centro de Investigaciones en Óptica, A.C. (Mexico)
Fernando Mendoza-Santoyo, Centro de Investigaciones en Óptica, A.C. (Mexico)


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