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Meller Optics

High precision optics for Medical, Industry and Defense. https://linktr.ee/Melleroptics Precision Optics Manufacturer. Lenses, windows, prisms, domes and more.

Sapphire, Germanium, Zinc Selenide, Zinc Sulfide, Silicon, and Ceramics. For Military, Medical, Industrial and Laser Applications.

12/08/2025

For over a century, we’ve focused on one thing: precision. Our history has been built on innovation, reliability, and engineering excellence.
Today, we support customers across aerospace, defense, medical instrumentation, and advanced manufacturing — delivering sapphire windows, domes, lenses, and custom optical components built for the toughest environments.
We’re proud of how far we’ve come — and even more excited for what’s ahead.

12/02/2025

From mission-critical aerospace systems to cutting-edge medical instruments, we’ve built our reputation on delivering optics that perform where others can’t. With deep material expertise and a long history of engineering innovation, we continue to support programs that shape the future of technology — even beyond Earth.

If your project needs durability, clarity, and precision, our team is ready to partner with you.

11/25/2025

At Meller Optics, we turn sapphire into solutions.

From extreme aerospace environments to precision medical and defense systems, our custom-fabricated sapphire optics are engineered to perform where other materials fail. With exceptional hardness, chemical resistance, and optical clarity across a wide spectrum, sapphire opens the door to designs that demand reliability under pressure.

Whether it’s a protective window for high-speed imaging, a lens for advanced instrumentation, or a completely unique configuration, every sapphire optic we produce is crafted in the USA with meticulous attention to detail and performance.

If your system relies on accuracy, durability, and optical excellence — we’re here to help you build it. Melleroptics.com

11/20/2025

Learn about Meller Optics Custom Fabricated sapphire windows! Manufactured in the USA.

Melleroptics.com

11/17/2025

Custom sapphire optics built to handle the toughest environments are now available from Meller Optics, Inc. of Providence, RI.

These sapphire lenses and windows are ideal for demanding tools like blood-gas monitors, centrifuges, and other precision medical and industrial instruments.

Meller Sapphire Lenses & Windows are extremely durable, optically clear, and resistant to chemicals. They transmit light from the UV range all the way to 4.7 microns — up to 85% without coatings, and more than 99% with specialized coatings. Because sapphire is a Mohs 9 material (second only to diamond), these optics offer outstanding scratch and wear resistance.

We can manufacture these parts in a wide range of shapes and sizes to meet customer requirements:

• Lenses or windows

• Flat, stepped, concave, or convex

• Round or square profiles

• Mounting holes and slots available

Each optic is built to spec and can range from 0.25” to 10” in diameter and 0.5 mm to 1” thick. We also offer scribed directional arrows for alignment. Precision tolerances include:

• Flatness to 1/10th wave

• Parallelism to 2 arc-seconds

• Surface finishes below 0.5 nm

These sapphire components are well-suited for harsh environments, including glass-to-metal sealing and brazing into Kovar® assemblies.

Pricing is based on the design and quantity. Technical details or quotes are available anytime—just reach out at Melleroptics.com.

10/15/2025

Meller Optics, Inc. of Providence, RI, has high-precision sapphire UV cell windows available for Beckman® and other centrifuges. These windows offer exceptional optical clarity along with superior chemical, pressure, and scratch resistance.

Designed specifically for Beckman® and other high-speed centrifuges, Meller Sapphire Centrifuge Cell Windows feature a scribed arrow on the edges to indicate the optic axis, making installation and alignment straightforward. They are optically clear, mechanically durable, and resistant to etching, fogging, degradation, and extreme centrifugal forces.

These windows are manufactured with tight tolerances to ensure proper sealing and alignment within the centrifuge cells. They measure 19.03 mm in diameter (±0.03 mm) and 5 mm in thickness (±0.10 mm). The windows are offered plano, with chamfers measuring 0.35 mm x 45 degrees at two locations, and have a 30-10 scratch-dig surface finish. Suitable for OEMs and end-users alike, custom sizes are also available. Contact us at Melleroptics.com

10/09/2025

Meller Optics, Inc. of Providence, RI, produces custom-fabricated large sapphire windows designed to safeguard vision systems on both commercial and military aircraft and drones. These sapphire windows are available in nearly any configuration, up to 10 inches in diameter, and can be shaped to suit specific needs. Boasting a Mohs hardness of 9—second only to diamond—they provide exceptional durability and protection for cameras and sensors. The windows are as clear as glass, offering broad spectral transmission from UV (270 nm) to IR (4.7 microns), and are capable of withstanding harsh conditions such as sand and high-speed particulates, enhancing visibility in challenging environments.

Built for resilience, Meller Large Sapphire Windows feature flatness to one-tenth wave in the visible spectrum and less than 2 arc seconds per inch in parallelism. They are finished with scratch-dig ratings ranging from 60-40 to 40-20, depending on size and design. Additionally, sapphire domes and hyper-hemispherical sapphire domes for 360-degree viewing are also available. Melleroptics.com

10/07/2025

Meller Optics, Inc. of Providence, RI, has released a detailed 8-page whitepaper outlining the key properties of sapphire and its diverse range of applications as a durable, opto-electronic material.

The whitepaper, titled *Properties and Applications of Sapphire*, offers an in-depth overview of sapphire’s structural characteristics, including its hexagonal and rhombohedral crystal forms, and how these influence property-dependent plane orientations. It highlights sapphire’s strength, durability, and optical clarity across different planes, supported by charts illustrating physical properties, wavelength ranges, and refractive indices.

Focusing on practical uses, the whitepaper categorizes sapphire applications into areas such as windows and lenses, optical domes and 360-degree viewing windows, waveplates, and precision balls. It emphasizes that many of the most critical applications involve extreme conditions—such as exposure to abrasive particles like sand, saltwater, algae, high pressures, vacuum environments, radiation, and outer space.

The *Properties and Applications of Sapphire* whitepaper is available free of charge at https://melleroptics.com/technical-data-for-sapphire-optics

09/30/2025

Advancing Optical Solutions for Modern Defense Technologies-
At Meller Optics, we are dedicated to pioneering high-performance optics that meet the demanding needs of modern defense systems. Our expertise in manufacturing sapphire and polishing of alumina optics enables us to support cutting-edge applications, including hypersonic missile technology and directed energy weapons.

09/17/2025

Meller Optics, Inc. offers custom-fabricated sapphire domes designed to accommodate different curvature sizes for missile systems, as well as nearly flat configurations suitable for gimbals and hypersonic applications.
Meller Sapphire Domes offer a maximum viewing angle of 160 degrees and are resistant to dirt, sand, and saltwater, protecting guidance systems from the elements. They transmit up to 85% of light without coatings from UV to IR, and up to 99% when coated on both sides. They can be made with long curves or nearly flat for use in hypersonic weapons.

09/11/2025

Meller Optics — a leader in the development of high-precision sapphire optics for aerospace, defense, undersea and industrial applications. With decades of expertise, Meller specializes in designing durable, reliable optical components capable of performing under the most demanding conditions.

Utilizing advanced manufacturing techniques—including ultra-precision grinding, polishing, and specialized coating processes—Meller produces sapphire optics that offer exceptional hardness, thermal stability, and resistance to scratching and corrosion. These qualities ensure optimal performance in extreme environments such as space exploration, military defense systems, and industrial inspection equipment.

09/04/2025

Meller Optics is at the forefront in the manufacturing of high tolerance laser, military, industrial and medical optics, utilizing a full range of UV, visible and IR materials.

Address

Providence, RI

Opening Hours

Monday	9am - 5pm
Tuesday	9am - 5pm
Wednesday	9am - 5pm
Thursday	9am - 5pm
Friday	9am - 5pm

Website

https://melleroptics.com/contact/

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