
Coaxial Deflectometry Optical Metrology System for Simple, fast, and affordable nanometer precision optical metrology for reflective surfaces
Wyse Light invented coaxial deflectometry to make nanometer-accuracy 3D shape measurement of reflective surfaces easy and affordable, in the metrology lab and on the shop floor.
Measure any reflective surface with one system
From flats to freeforms, the RayMaster10 platform measures the 3D shape of reflective surfaces with interferometry-like accuracy in a compact lightweight setup.
- flats,
- spheres,
- aspheres,
- off-axis parabolas,
- cylinders,
- tores,
- axicons,
- microlens arrays,
- …


Any material as long it is presents some level of reflectivity. RayMaster10 can even measure glass which presents only a 4% reflectivity index. The RayMaster10 can thus measure not only mirrors, but also lenses, and windows. It can even measure molds. And it does not require any reference surface to do so whatever the shape of the object.
Coaxial deflectometry: our patented technology
Coaxial deflectometry overcomes the fundamental shape ambiguity of classic deflectometry and delivers absolute shape measurements without CGHs or dedicated reference surfaces.

Nanometer accuracy, lab and shop floor ready
The system achieves better than 3 nm accuracy on mid and high spatial frequencies and around 15 nm on low frequencies, while remaining insensitive to vibrations and air turbulences.
Single-shot acquisition takes about 10 seconds, with results available after only a few minutes of processing.
Comparative results with the best high-end instruments
We have made many measurements of very different samples, and were able to compare our results to the best CMM (Taylor&Hobson Luphoscan, DUI Nanomefos), and Zygo interferometers.
The largest part that we measured so far was a 800 mm concave freeform mirror. We can do better but didn’t have the opportunity so far. The smallest was a 15mm diameter lens. We could even measure parts that were not measurable with other commercial systems.
Below are 2 tables that show comparative measurement results with the following instruments:
– RM = RayMaster10,
– Interfero = Zygo interferometer,
– NMF = DUI Nanomefos
All measurements were done by the same operator.

Deviation to the nominal shape (in nanometers)

Deviation to the nominal shape difference two by two (in nanomaters)

From R&D labs to high-volume optics manufacturing
Wyse Light helps precision optics manufacturers and research labs shorten production cycles, qualify optics, and relieve metrology experts from repetitive and time consuming measurements.

Nanometer accuracy with our easily deployable off-the-shelf table top setup

WYSE light Ray Master is composed of a measurement unit and a display screen that can be used on a regular table top desk, deflectometry being basically insensitive to vibrations. Now you can measure anywhere! And yes, you can new have nanometric accuracy on an office desk like this. We even make live measurements during trade shows on folding tables with a repetabilty of 2 nm RMS.
Let’s work together
Curious to see how RayMaster10 fits your parts and tolerances? We can demo on your optics, rent our systems, or run measurements for you.
Strategic supporters

We are a Luminate portfolio company. Wyse Light has been selected in March 2025 with 10 others startups among 197 candidates from all over the world to integrate the Nextcorps Luminate startups accelerator, the first and largest startups accelerator dedicated to the optics photonics sector.

Wyse Light is actively supported by the Saint-Etienne metropolitan area through its innovation support programs. Wyse Light is Mind-certified and housed in the building dedicated to the most innovative high-tech startups (bâtiment des hautes technologies).

EXIMIUM is an investment holding company with an entrepreneurial culture that acquire of both majority and minority stakes, while developing financial activities. With a consolidated workforce of 500 people, EXIMIUM manages more than €400 million in assets for its own account. EXIMIUM supports Wyse Light since 2023.

Wyse Light is supported by the French Public Bank of Investment though its financial support programs dedicated to the most innovative French deep tech startups.