21 May 2015 Calibration of zoom lens with virtual optical pattern
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Abstract
The accuracy of calibration patterns, their fabrication, and their setup are some of the important challenges in a zoom-lens camera calibration process. We address these problems by using a cross-diffractive optical element, which generates a virtual, dense, and robust calibration grid. We show that a 33×33 calibration grid provides enough control points to fill the entire field of view for 10 to 20× zoom lenses. We show that the calibration of a zoom camera at infinity can be done using this method. A polynomial function has been used to model the variation of the intrinsic calibration parameters over the zoom range. The obtained calibration model has also been validated using a well-known target pattern.
© 2015 Society of Photo-Optical Instrumentation Engineers (SPIE)
Aymen Arfaoui, Simon Thibault, Pierre Desaulniers, "Calibration of zoom lens with virtual optical pattern," Optical Engineering 54(5), 054107 (21 May 2015). https://doi.org/10.1117/1.OE.54.5.054107 . Submission:
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