Wielandts UPMT is a young innovative high-tech company that was founded in September 2013 by Marc Wielandts. 100% privately owned, the company has now 6 collaborators and is incubated by WSL, a Walloon Region technology-incubator.
During its first years, Wielandts UPMT has developed a PCT patent pending technology called DPI™ (Dynamic Part Indexing) that is a real breakthrough solution for the machining of lens arrays and monolithic multi-cavity molds. Using this technology, Wielandts UPMT has manufactured lens arrays to customer specifications for diverse applications: LED lighting mold inserts, MLA masters for optical structure replication processes, IR lens batch machining and optics at wafer level. Given the tendency to use more and more monolithic multi-cavity molds to reduce costs while increasing the accuracy, DPI™ is perfectly adapted to optimize the production processes by making them ever simpler and more efficient.
To provide a complete service to its customers Wielandts UPMT has invested in its own state of the art Ultra Precision machine tool and metrology equipment. This equipment is operated in a thermally stable and vibration free clean room environment. Besides this equipment, Wielandts UPMT also has access to a large panel of conventional machines and metrology equipment.
Thanks to many years of experience in ultra-precision machining, Wielandts UPMT is recognized as a reliable partner by its international customers.
In contact of its customers of the photonics industry, Wielandts UPMT also became aware of the difficulties and limits of molding optics. In order to improve the quality and accuracy of those lenses, Wielandts UPMT has developed an iso-thermal molding technology, called COMPAS™, taking profit of the advantages of DPI™.
Wielandts UPMT is active in multiple market segments, like automotive, compact camera modules (AR/VR/smartphones, medical, …), sensors, space, defense, …

Key Personnel

Marc Wielandts has a master degree in aeronautical engineering (1984) and has more than 25 years of experience in the field of opto-mechanics and mechatronics for space applications, astronomy and high tech industrial applications. In 2012, in his free time, he solved the problem to index automatically large lens arrays allowing to sequentially machine every single lens on axis. Convinced of all the advantages, he decided to develop, patent and commercialise this technology.

Remi Wielandts obtained his master degree in precision mechanical engineering in 2014 at the TU Delft (Netherlands). He developed his thesis related to the development of the DPI technology at the KU Leuven. He started as mechatronics engineer and Ultra-precision machining specialist at WIELANDTS UPMT and is actually the CTO.

Jean-François Jamoye is a physician engineer with experience in designing and building high-precision optical and mechanical equipment for the space and professional astronomy industry. Specialized in managing projects and experienced with ultra-precision and metrology, he is responsible at Wielandts UPMT for research and development of technologies.


Wielandts UPMT s.a.
c/o WSL theLABS
Rue Bois Saint-Jean 15/1
4102 Seraing, Belgium
VAT: BE 0537 956 555
Phone: +32 4 353 30 23


The European regional development fund (ERDF or FEDER) and the Walloon region have financially supported an investment project to extend the manufacturing capabilities of Wielandts UPMT in ultra-precision machining for optics applications. The goal of the investment project was to develop its own manufacturing capabilities. These were needed to offer a complete solution to our customers and exploit the developed DPI system for lens arrays. Within this project, investment was made in diamond turning but also molding and metrology equipment. For further information, see http://europe.wallonie.be

Privacy Policy

Who we are

Wielandts UPMT s.a. has its legal address at Rue Bois Saint-Jean 15/1, 4102 Seraing, Belgium. Our website address is: http://www.upmt.be. For more contact details, please have a look at the contacts section.

What personal data we collect and why we collect it

Contact forms

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These websites may collect data about you, use cookies, embed additional third-party tracking, and monitor your interaction with that embedded content, including tracing your interaction with the embedded content if you have an account and are logged in to that website.


When you visit a page on our website, we ask your permission to track your whereabouts around our website in compliance with the European General Data Protection Regulation. To do this we install cookies on your computer. If you decide to to opt-out of any future tracking, a cookie will be setup in your browser to remember this choice for one year.

If you give us your permission, we collect the following information: location, pages visited, operating system and browser type. Your IP address is masked out to comply with the European GDPR. We use this data purely for statistical analyses and marketing impact analyses. We do not track any of your activity on the web outside of our website.

Finally our website complies with the Do Not Track (DNT) header. The DNT header is the proposed HTTP header field that requests that a web application disable its tracking of an individual user. You can turn on this feature inside your browser's preferences.

Who we share your data with

We do not share any of your data, in part or in whole, with any third parties outside Wielandts UPMT.

How long we retain your data

If you subscribe to our newsletters through the subscription forms, we retain your data indefinitely or as long as you do not ask to unsubscribe. When you visit our website, we retain your visitor statistics for one year.

What rights you have over your data

You can request to receive an exported file of the personal data we hold about you, including any data you have provided to us. You can also request that we erase any personal data we hold about you. This does not include any data we are obliged to keep for administrative, legal, or security purposes.