prof.dr.ir. I.M. Vellekoop (Ivo)


About Me

Microscopes are great tools to investigate living cells. However, when the cell is embedded deep inside biological material (such as tumor tissue, or brain tissue), high-resolution imaging is not possible: the surrounding material is simply not transparent enough. 

Is is my mission to develop a new approach to microscopy that allows researchers to look right through non-transparent layers of tissue. In order to achieve this, we use wavefront shaping, a technique developed in 2007 at the University of Twente by Allard Mosk and me. This technique allows one to focus light right through non-transparent materials.

From our first proof-of-concept experiment to a usable microscope is a long way to go. We have found that reaching our goal requires more than good physics and optics; we are integrating elements from information theory, quantum mechanics, mathematics and electrical engineering in our research to keep pushing forward. We work together closely with neuroscientists and other end users of microscopes to make sure our microscopes are optimally geared towards solving fundamental questions in the life sciences.

More information about my research can be found here.


Engineering & Materials Science
Multimode Fibers
Quantum Communication
Secure Communication
Physics & Astronomy
Phase Conjugation
Visual Perception


Mastiani, B. (2023). Optimal wavefront shaping. [PhD Thesis - Research UT, graduation UT, University of Twente]. University of Twente. https://doi.org/10.3990/1.9789036555050
Mastiani, B. , & Vellekoop, I. M. (2021). Noise-tolerant wavefront shaping in a Hadamard basis. In European Conferences on Biomedical Optics, ECBO 2021 Article ETh3C.5 (Optics InfoBase Conference Papers). The Optical Society. https://doi.org/10.1117/12.2616116
Zhang, X., Cao, Z., Li, J., Ge, D., Chen, Z. , Vellekoop, I. M. , & Koonen, A. M. J. (2020). Wide-Coverage Beam-Steered 40-Gbit/s Non-Line-of-Sight Optical Wireless Connectivity for Industry 4.0. Journal of lightwave technology, 38(24), 6801-6806. Article 9187535. https://doi.org/10.1109/JLT.2020.3022329

UT Research Information System

Courses Academic Year  2023/2024

Courses in the current academic year are added at the moment they are finalised in the Osiris system. Therefore it is possible that the list is not yet complete for the whole academic year.

Courses Academic Year  2022/2023

Contact Details

Visiting Address

University of Twente
Faculty of Science and Technology
Horst Complex (building no. 20), room ZH265
De Horst 2
7522LW  Enschede
The Netherlands

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Mailing Address

University of Twente
Faculty of Science and Technology
Horst Complex  ZH265
P.O. Box 217
7500 AE Enschede
The Netherlands