Optical thin-film design and modelling software — from layer optimization to closed-loop production control.
We specialize in optical interference coatings — and we ship that experience as one product: EulenStudio. Its modules fit n, k, thickness and uniformity from your spectra, find the best design against spectral, colour and angle targets, compute tolerance and yield before the batch, close the loop between spectrometer and coater, and learn tooling factors and drift from your production history. The modules launch step by step — EulenControl is in production today. Alongside the product, we work as an engineering partner: simulation models, data analysis, AI production optimization and machine interfaces.
Based in Zug, Switzerland | Serving precision optics and high-tech industries worldwide
Four industries, four different lines — and four different answers from the same product. Pick yours: behind each one is a page that walks your process step by step, in your standards, your materials and your coater.
Filters and mirrors of a hundred layers and more — steep edges, deep blocking, held across the batch.
Batch coaters, witness chips, and a specification that leaves no room.
The detailed page for this edition is in preparation.
Ask us about your lineInline coating of architectural and solar glass — solar and thermal performance of the whole unit, not of the coating on its own.
Inline lines, wide panes, and a colour that has to hold across the whole run.
See the full process chainMinimal reflectance at production scale — on solar glass, displays and ophthalmic optics, in batch, dip or inline coaters.
Batch, dip or inline — on glass, polycarbonate and CR-39, where yield decides the margin.
The detailed page for this edition is in preparation.
Ask us about your lineOptical and decorative components: antireflection, absorbers, target colour, watch dials.
Batch coaters, mixed job lists, and parts the customer judges by eye.
The detailed page for this edition is in preparation.
Ask us about your lineOne physics engine, one project — from the first measurement to the running line. EulenStudio launches in October 2026, the modules arrive step by step; EulenControl leads and is in production today. Developed in Switzerland, configured for your process.
Characterizes your materials and stacks.
More →Finds the stack for your specification.
More →Tolerance and yield before the batch runs.
More →Measures, computes and corrects live at the machine.
More →Learns from your production history.
More →Converts time-based data into batches.
More →Our software integrates seamlessly into any operation requiring reverse engineering of layer thicknesses from interference spectra. Thanks to advanced algorithms, we can optimize not only coating thickness but also material parameters and optical constants — delivering significantly more precise results than conventional software that only varies layer thickness.
You build coating machines; together we build the software that lets your customers measure, decide and correct. Because your customers can run the same software across machines from different builders, they get one consistent workflow for their whole fleet — backed by our experience making closed-loop control work reliably on optical coaters.
The product is one half of what we do. The other half is engineering to order — on your data, your coatings and your machines.
Setting a New Benchmark in AR Coating Measurement
Accurate optical measurement is essential for manufacturers of anti-reflective (AR) coatings on solar glass, as performance differences below 0.1% directly determine market competitiveness. However, traditional lab spectrometers often fail on textured surfaces because they scatter light strongly, introducing critical substitution errors.
Convsun (one of the world's leading AR coating producers) partnered with Eule27 AG to develop an integrated dual-detector measurement system. Convsun designed and built the hardware setup, while Eule27 developed all measurement procedures, data acquisition routines, and thin-film simulation models. Together, this collaboration closes the entire process control loop:
By combining Convsun's industrial expertise with Eule27's optical modeling, spectral analysis, and process integration, this partnership sets a completely new benchmark for industrial-grade optical monitoring and reverse engineering.
Want to know more about how these algorithms can support your own production goals? Contact us directly for a software consultation tailored to your facility, or read the full case study on the Avantes website.
Founded two years ago, Eule27 combines deep technical expertise in optical thin films with modern software development — custom software for individual customers, and from autumn 2026 additionally as EulenStudio, our standard product. Our team brings years of practical experience developing optical interference coatings for architectural glass, display technology, and solar applications together with modern AI approaches. We bridge the gap between theory and production, delivering end-to-end solutions.
Everything you need to know about Eule27's All-in-One integration.
Optical thin-film software is easier to judge with the people who wrote it standing next to it. Here is where to find us next.
Düsseldorf, Germany
Talk on 21 October, 3:45–3:55 p.m. (Start-Up Stage, Hall 10); booth E24, Hall 11.
LatestThank you, ICCG 2026 — next stop: glasstec
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