4D Technology is the leader in high-resolution, vibration-insensitive surface and wavefront measurements for challenging applications.4D Technology’s Optical Metrology Products assure the quality of precision optics and optical systems. Our Dynamic Interferometry assures the surface and wavefront quality, despite vibration or turbulence.High-resolution, optical 3D measurement gauges you can bring right to your part. With one-button operation, quickly and accurately quantify defects such as pits, scratches, and corrosion and geometries such as edge break, chamfers, and radius.4D Technology’s customer service and technical support is second to none. As a small company it can be difficult to stay current with cutting edge technology, but the 4D team worked with us to make it happen quickly. Since we’ve received the 4D InSpec, it has been instrumental in speeding up inspections and reducing scrap and rework. I can’t say enough good things about their willingness to help small businesses succeed.”Our graduates are equipped with the necessary skills to immediately become valuable technicians in the optics industry. To ensure that, we partner with industry leaders in their fields, such as 4D, to incorporate and teach modern, advanced technologies. The NanoCam provides opportunity for LaserTech students to gain applied experience measuring optical surface roughness, and to see first-hand the effects of various polish levels on the texture of an optical surface. This includes learning about the limits of the measurement technique. 4D’s service and support continues to surpass expectations, as we have relied on in-person hardware demonstrations from 4D field service engineers for the past decade. As an industrial advisor, we also leverage 4D’s metrology expertise to review and refine our curriculum.”They are able to measure around a curved surface, they are able to measure in a divot, or measure many different areas of the engine we were not able to measure before accurately, you could just not do it. There was nothing out there that could do it.”4D Technology interferometer has enabled us to make measurements that were not previously possible, including measurements that are crucial to the success of the James Webb Space Telescope Project. The 4D system has exceeded our expectations.”4D Technology machine (The Ferrari of interferometers). Thank you for supplying us with such a great product.”Why Surface Roughness Specifications Are Shifting from Ra to Sa by Jensen Peyton | Sep 28, 2026As optical manufacturing and precision engineering continue to advance, traditional 2D surface roughness metrics like Ra are no longer sufficient for fully characterizing complex surfaces. This article explores why manufacturers and standards bodies are increasingly...Webinar: The Next Step in Aviation Surface Inspection by Jensen Peyton | Sep 28, 2026In this webinar, we explore how 3D surface inspection is moving beyond manual tools toward automated solutions designed for real-world MRO environments. Learn how today’s optical technologies can help maintenance teams improve repeatability, reduce inspection...4D Technology, explores how aviation MRO organizations are moving beyond traditional visual and 2D inspection methods by adopting optical 3D surface measurement technologies. The webinar discusses...4D Technology Introduces 4Di InSpec™ SR System for Shop-floor Surface Roughness by Patricia Browne | Jun 3, 2026Fast, rugged, portable roughness system provides high-resolution, 3D measurements of surface finish on the shop floor Onto Innovation’s Tucson-based subsidiary 4D Technology announced today the launch of the 4Di InSpec™ SR roughness measurement system - a novel,...