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Proceedings Paper • Open Access

Measuring the image quality of digital-camera sensors by a ping-pong ball
Author(s): Antonio M. Pozo; Manuel Rubiño; José J. Castro; Carlos Salas; Francisco Pérez-Ocón

Paper Abstract

In this work, we present a low-cost experimental setup to evaluate the image quality of digital-camera sensors, which can be implemented in undergraduate and postgraduate teaching. The method consists of evaluating the modulation transfer function (MTF) of digital-camera sensors by speckle patterns using a ping-pong ball as a diffuser, with two handmade circular apertures acting as input and output ports, respectively. To specify the spatial-frequency content of the speckle pattern, it is necessary to use an aperture; for this, we made a slit in a piece of black cardboard. First, the MTF of a digital-camera sensor was calculated using the ping-pong ball and the handmade slit, and then the MTF was calculated using an integrating sphere and a high-quality steel slit. Finally, the results achieved with both experimental setups were compared, showing a similar MTF in both cases.

Paper Details

Date Published: 17 July 2014
PDF: 8 pages
Proc. SPIE 9289, 12th Education and Training in Optics and Photonics Conference, 92892R (17 July 2014); doi: 10.1117/12.2070762
Show Author Affiliations
Antonio M. Pozo, Univ. de Granada (Spain)
Manuel Rubiño, Univ. de Granada (Spain)
José J. Castro, Univ. de Granada (Spain)
Carlos Salas, Univ. de Granada (Spain)
Francisco Pérez-Ocón, Univ. de Granada (Spain)

Published in SPIE Proceedings Vol. 9289:
12th Education and Training in Optics and Photonics Conference
Manuel F. P. C. Martins Costa; Mourad Zghal, Editor(s)

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