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.
© 2013 OSA, SPIE, IEEE, ICO
PDF ArticleMore Like This
David H. Foster and Iván Marín-Franch
ITh3D.2 Imaging Systems and Applications (IS) 2013
Joyce Farrell, Peter Catrysse, and Brian Wandell
JTuA26 Imaging Systems (IS) 2010
Aline Vernier, Baptiste Perrin, Thierry Avignon, Jean Augereau, and Lionel Jacubowiez
TPE28 Education and Training in Optics and Photonics (ETOP) 2015