At the heart of innovation in optical testing, Difrotec OÜ stands as a beacon of precision and accuracy. Our flagship product, the Difrotec D7, is not just an instrument; it's a testament to our relentless pursuit of perfection in optical metrology. Born from a breakthrough technology, the D7 is a high-accuracy industrial point diffraction interferometer designed to push the boundaries of what's possible in absolute surface form measurement.

With the D7, we introduce a new era of high accuracy point diffraction interferometry. This phase-shifting point diffraction common path interferometer is engineered for ultra-high accuracy measurements of surface form and transmitted wavefront quality. It detects the absolute figure of a surface or wavefront, using a perfect spherical wavefront produced by diffraction of light through a sub-wavelength aperture as its absolute reference.

Our commitment to excellence is reflected in the D7's impressive performance specifications. Achieve peak-to-valley absolute accuracy of ± 0.6 nm (λ /1000), and a resolution of 0.05 nm (λ/12000), with wavefront RMS repeatability of < 0.23 nm (λ /2800). The D7's capabilities are not just numbers; they are a promise of 'Precision in Every Refraction!'

But our expertise doesn't end with the D7. We offer comprehensive optical testing and measurement services, catering to a wide range of needs from testing surface figures of various shapes to curvature radius measurements. Our services are meticulously designed to support industries where precision is not just a requirement, but the foundation of quality.

In addition to our testing services, we excel in optical design and fabrication. With over 30 years of experience in computer modeling of high-precision optical systems, we have the expertise to design and fabricate custom optical solutions that meet the most demanding requirements.

Join us in our mission to provide high-accuracy optical measurement services and design custom optical systems. Explore our latest product information and see how the Difrotec D7 can elevate your optical testing to unparalleled levels of precision. Download our product brochure and start your journey towards absolute accuracy today.