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Novel stent optical inspection system

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.

Novel stent optical inspection system full article
C. Bermudez,1,2 F. Laguarta,1 C. Cadevall,1,2 A. Matilla,2 S. Ibañez,3 and R. Artigas1,2
1 Center for Sensors, Instruments and Systems Development (CD6), Universitat Politècnica de Catalunya (UPC) Rambla Sant Nebridi, 10, E-08222 Terrassa, Spain.
2 Sensofar Tech SL, (Spain)
3 Sensofar Medical SL, (Spain)
Imaging and Applied Optics 2016,  OSA Technical Digest (online) (Optical Society of America, 2016), paper AITh2B.3


Stent quality control is a critical process. Coronary stents have to be inspected 100% so no defective stent is implanted into a human body. Skilled operators currently perform the quality process control visually, and every stent could need tens of minutes to be inspected.

In this paper, a novel stent optical inspection system is presented. By the combination of a high numerical aperture microscope, a triple illumination optical system, a rotational stage, and a line-scan camera, unrolled sections of the outer and inner surfaces of the stent are obtained with high resolution at high speed.

We expect with this new approach to make the stent inspection task more objective and to dramatically reduce the time and the overall cost of the stent quality control process.


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. Stent optical inspection system calibration and performance, 2017, Applied Optics Vol. 56, Issue 9, pp. D134-D141

Three-dimensional measurements