Imagine Optic has been working for the European Space Agency (ESA) since last Summer on designing an optical bench to characterize the dichroic beam-splitter of the EUCLID telescope.

EUCLID’s main mission is to map dark matter throughout the universe with unprecedented precision. This delicate and complex task relies on many factors, and the ability to separate between different wavelengths with great precision is a major requirement. 

The optical bench, codenamed OBSERVE will perform analysis of the reflected wavefront with an accuracy exceeding 1nm RMS, for a large wavelength range covering EUCLID’s VIS instrument needs (500-950 nm). It will be installed in Q4 2022 at the Laboratoire des Matériaux Avancés de Lyon where this final ultra-precise characterization will be done on a perfect clone of the beam-splitter that will fly to space at the same period from ESA’s launchpad in Kourou.

If you’re interested in finding out more about our line of Wavefront Sensors and Optical Metrology Systems, or more specific expertise you can reach us at or through the contact form (red enveloppe on the side).