Did you know that fused‑silica transmission gratings can be used for UV-VIS spectroscopy?
In many applications, only the UV-region is of interest and typically instruments are designed with reflective blazed or holographic gratings. However, our transmission gratings – etched directly into fused silica – can often outperform all other types of gratings.

This plot shows how our 2421 lpmm fused‑silica transmission grating delivers higher diffraction efficiency across the entire UV-region compared to commonly used reflective blazed and holographic gratings.
This performance is achieved through a precisely engineered tooth profile and the near‑100% transmission of the thin fused‑silica substrate.
Find out about the advantages of transmission gratings in the upcoming webinar by our colleague Tobias Buchmann on the 10th of June.
Enhance Your Spectrometer’s Sensitivity: Here’s How
Many OEMs are used to building spectrometers around reflective gratings – and that familiarity can make it tempting to stay with the architecture you know. However, transmission gratings can offer some distinct benefits – such as more compact spectrometer design or a flat spectral response.
Ibsen has spent decades mastering transmission-grating spectrometers, from the grating design itself to the full optical engine. This means our customers can skip the steep learning curve of designing a transmission grating based spectrometer from scratch and instead – leverage platforms that are already optimized, manufacturable, and field proven. For your instrumentation this means:
- Faster time-to-market, as your spectrometer is built on our production-proven designs and assembly methods
- Lower total cost and reduced engineering effort, allowing your team to focus on increasing the core value of your instrument rather than on developing the spectrometer subsystem.
We use in‑house–manufactured fused‑silica transmission gratings to build the world’s most sensitive spectrometers providing benefits such as:
- High and broadband diffraction efficiency for highly sensitive spectrometers
- High dispersion, enabling compact spectrometer designs
Learn more about the benefits of transmission grating based-spectrometers in our white paper.

Expert insights
Join Dr. Tobias Buchmann, our International Business Development Manager and recognized expert in advanced optics, photonics, and materials science – as he shares expertise in transmission gratings for UV-VIS spectrometers.
With a PhD and PostDoc from DTU (Technical University of Denmark), Tobias brings deep knowledge in ultrafast optics, fiber optics, and THz photonics, along with over two years of hands-on device development experience. His strong scientific background and practical experience have earned him a spot on Electro Optics “The Photonics 100” list, recognizing his role in transforming innovative optics research into real-world solutions.
In this webinar, Tobias will introduce transmission gratings tailored for the UV and UV-VIS wavelength ranges and compare their performance with commonly used blazed and holographic gratings. Discover how fused-silica transmission gratings can improve the performance for both UV-only and broadband spectrometers.

