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Stent optical inspection system calibration and performance

Optical metrology
R&D Engineering Manager, Ph.D. in Optical Engineering, MSc in Photonics at Sensofar Metrology | Other articles

Carlos has collaborated since 2010 on the development of confocal, interferometry and focus variation technologies at Sensofar, where he holds the R&D Engineering Manager position since 2018. His interests are Optomechanical Systems Design and Image Processing.
Its consolidated research work in optical engineering confer the Sensofar R&D group an outstanding position to always stay up-to-date in terms of innovation and the highest technological level.

Stent optical inspection system calibration and performance full article
C. Bermudez,1,2 F. Laguarta,1 C. Cadevall,1,2 A. Matilla,2 S. Ibañez,3 and R. Artigas1,2
1Center for Sensors, Instruments and Systems Development (CD6), Universitat Politècnica de Catalunya (UPC) Rambla Sant Nebridi, 10, E-08222 Terrassa, Spain.
2Sensofar-Tech, S.L., (Spain)
3Sensofar-Medical, S.L., (Spain)
Applied Optics Vol. 56, Issue 9,pp. D134-D141 (2017)

Abstract

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.

References

Carlos Bermudez, Ferran Laguarta, Cristina CadevallAitor Matilla, Sergi Ibañez, and Roger Artigas. Optical stent inspection of surface texture and coating thickness, Proc. SPIE 10110, Photonic Instrumentation Engineering IV, 1011007 (20 February 2017)

Carlos Bermudez, Ferran Laguarta, Cristina Cadevall, Aitor Matilla, Sergi Ibañez and Roger Artigas. Novel Stent Optical Inspection System, 2016, Applied Industrial Optics: Spectroscopy, Imaging and Metrology, Paper# AITh2B.3

Confocal fusionAutomated stent defect detection