Stent optical inspection system calibration and performance
PublisherOptical Society of American (OSA)
Rights accessOpen Access
Implantable medical devices, such as stents, have to be inspected 100% so no defective ones are implanted into a human body. In this paper, a novel optical stent inspection system is presented. By the combination of a high numerical aperture microscope, a triple illumination system, a rotational stage, and a CMOS camera, unrolled sections of the outer and inner surfaces of the stent are obtained with high resolution at high speed with a line-scan approach. In this paper, a comparison between the conventional microscope image formation and this new approach is shown. A calibration process and the investigation of the error sources that lead to inaccuracies of the critical dimension measurements are presented.
CitationBermudez, C., Laguarta, F., Cadevall, C., Matilla, A., Ibañez, S., Artigas, R. Stent optical inspection system calibration and performance. "Applied optics", 20 Març 2017, vol. 56, núm. 9, p. D134-D141.