High-Finesse Etalons & Precision Optical Flats
Engineered to Perfection Lunt Optics designs and manufactures ultra-precise optical components for engineers, researchers, and innovators who demand uncompromising performance. From high-finesse Fabry–Pérot etalons to λ/40 optical flats and advanced coated mirrors, every product we deliver is built to meet the most rigorous specifications in the industry. Our optics serve as core elements in aerospace systems, defense platforms, spectroscopic instruments, and research laboratories worldwide—where absolute reliability and optical precision are not optional. With decades of engineering expertise and meticulous in-house fabrication at our facility in Tucson, Arizona, Lunt Optics is redefining precision for the next generation of photonics systems.
High-Finesse Fabry–Pérot Etalons
Ultra-parallel, high-reflectivity etalon assemblies designed to isolate sub-angstrom spectral lines and stabilize laser outputs. Our etalons offer extremely sharp interference fringes, tailored to your center wavelength, finesse, and FSR. Available in solid or air-spaced configurations.
Explore all our capabilities on the Products & Services page or use our Etalon Calculator to model the performance of your custom etalon in real time.
Precision Optical Flats
Reference-grade flats polished to λ/20 – λ/40 flatness, ideal for interferometry, optical testing, and calibration. Manufactured using our proprietary pitch polishing process, these flats provide true reference surfaces across >98% of the aperture.
Advanced Coated Flats
Mirror-quality flats with custom coatings—dielectric HR mirrors, partial reflectors, or low-loss AR layers—engineered to maintain surface flatness and optical clarity. Coated flats are used in laser systems, metrology tools, and high-contrast imaging setups.
Aerospace & Defense
Ruggedized etalons and ultra-flat mirrors used in satellite payloads, targeting systems, and reconnaissance optics. Engineered to meet MIL-spec tolerances and survive extreme environments.
Learn more about our work in these industries.
Scientific Research
Custom optics for spectroscopy, laser frequency stabilization, quantum physics experiments, and interferometric calibration. Trusted by national labs, universities, and advanced R&D facilities.
Industrial & Photonics OEMs
Precision components integrated into commercial instruments, LIDAR systems, laser modules, and optical metrology tools—enabling accurate performance at scale.
Our Foundation
Decades of Optical Innovation
Lunt Optics was founded by Andy Lunt, an optical engineer with over 30 years of experience in high-performance system design and fabrication. Andy previously launched Lunt Solar Systems, the world leader in solar telescope etalons and filters. Today, Lunt Optics brings that same legacy of excellence and innovation to a broader spectrum of optical components—engineered for labs, satellites, and laser cavities alike.