Meller Optics has been providing high quality optics to defense, medical, laser and industrial markets. Established in Providence, Rhode Island in 1921, Meller Optics has built a reputation for delivering superior products – on time, as specified, and within budget!

Specializing in grinding and polishing of hard, durable materials such as Sapphire, Meller Optics has also developed high-speed, low-cost finishing processes for a variety of Zinc Selenide, and Ceramic materials. Configurations include sapphire windows, sapphire lenses, sapphire domes, and sapphire prisms. Meller Optics, an ISO 9001:2015 certified company, also supplies quality Microlux Alumina polishing abrasives and Gugolz optical polishing pitch.

ISO 9001 2015 Certificate

Data Sheets
Sapphire Physical Mechanical Properties

Sapphire Crystalographic Planes

Sapphire Index of Refraction

Pressure Windows


SDS Sheets
SDS – PITCH – 55
SDS – PITCH – 64
SDS – PITCH – 73
SDS – PITCH – 82
SDS – PITCH – 91


Technical Articles
Optical Properties Article

Technical Data for Sapphire OpticsTechnical Data for Sapphire Optics
Sapphire Windows
MSLW Series plane parallel windows are designed for use in critical optical and laser applications where image quality and birefrin­gence effects are important. The raw material has minimal lattice distortion and is oriented with the optic axis normal to the faces to minimize the inherent birefringent properties of single crystal sapphire.  Download PDF

Sapphire Precision Balls
Series MSB precision manufactured sapphire balls are inventoried in a wide variety of sizes. These spheres are manufactured to A.F.B.M. A. Grade 25 standards and are also available in Ruby for enhanced visibility. Download PDF

Sapphire Waveplates
Sapphire waveplates are a unique alternative to crystalline quartz for rugged visible and JR polariza­tion control components. Sapphire is a tough bire­fringent crystalline material that has useful transmis­sion from .25 to 4.7 microns. Download PDF

IR Sapphire Windows
MSW Series plane parallel sapphire windows are an economical choice for a variety of optical, mechanical and electronic applications. Download PDF

Optical Sapphire Windows
MSPW series plane parallel sapphire windows are designed for more demanding optical ap­plications where image quality and birefrin­gence effects are important. Download PDF

Gugolz Optical Lapping Pitch
Meller Optics, Inc., formerly Adolf Meller Co., has specialized in fabricating Quality Optical and Laser Materials for UV and IR applications for over 55 years. Download PDF

Microlux Fine Alumina
Calcined from High Purity feed materiaL Microlux Alumina is produced to exacting specifications to assure you, our customer. of the finest Alumina available today! Download PDF

Meller Optics specializes in the manufacture of optical and electro-optical components utilizing the widest range of optical materials in the industry. From the hardest sapphire and ruby to the softest laser glass, Meller Optics, formerly Adolf Meller Company, has been a trusted supplier of quality optics to the Laser, Medical, Defense, Detector, and Sensor industries for over 70 years. 

Meller Optics manufactures plane, wedged, or tapered windows and square or rectangular substrates using over 30 different types of materials in prototype to production quantities.

Manufactured from the same fine materials as our windows, Meller Optics utilizes state-of-the-art CNC machining technology to produce lenses and near-hemispherical domes to exact specifications.

Meller Optics now supplies a full range of coated custom beam-handling optics for high and low power laser applications. Products include precision optical filters, mirrors, reflectors and beamsplitters.

Sapphire Retardation Plates
Ultraflat and parallel Sapphire and Quartz wafer carriers for mounting of thin semiconductor materials including GaN for Blue LEDs
Sapphire Optical flats and spacers
Quartz and Sapphire Centrifuge Cell Windows
Precision Balls and Ball Lenses of Sapphire, Quartz, and Glass
Quality Microlux Alumina abrasives
Gugolz optical polishing pitch

Core Capabilities
ISO 2001:2015 Certified
ITAR and DFARS Compliant
Sapphire Windows for Undersea and Aerospace Applications
Sapphire External Windows for Undersea Submersibles (Manned & Unmanned)
Sapphire Domes for Missile Applications
Sapphire Optical Components for a Wide Range of Applications
Technical Data for Sapphire Optics
Materials / Processes
Materials Fabricated
High Strength Optical Ceramics
Optical Glass
ZnSe, ZnS, Ge, Si
5-Axis Machining
Ultra-Flat Finishing / Polishing
High Precision Spherical Finishing / Polishing

Navy Uses Meller Optics, Inc Sapphire
Strengths / Capability Highlights
Masters of Sapphire Fabrication
Meller Optics Utilizes Proprietary High-Speed Processes to Deliver the Highest Quality Finishes on Sapphire Optical Components
On-Time Delivery
Competitively Priced
Able to Fabricate a Sapphire 360 Degree Viewing Window. Truncated Hyper-Hemispherical Configuration