Optical Coatings & Filters

G&H’s optical coatings and filters are used in critical applications including aerospace & defense, life sciences, industrial laser processing, and semiconductor lithography. Each coating is carefully developed and validated for spectral precision, environmental resilience, and coating uniformity—ensuring long-term reliability in harsh conditions or high-power environments.

Whether for low-loss laser optics or multi-band imaging systems, we work closely with our customers to deliver coatings and filters that enable superior system performance.

G&H designs and manufactures advanced optical coatings and filters to meet the most demanding requirements in imaging, sensing, and laser systems. Our portfolio spans narrowband and broadband filters, beamsplitters, polarizers, mirrors, and custom-coated substrates—engineered for precision across UV, visible, and infrared wavelengths. 

We offer high-performance solutions optimized for MWIR and LWIR applications in defense, aerospace, industrial, and medical markets.

We offer a wide range of dielectric, metallic, and hybrid coatings applied using ion-assisted deposition (IAD), e-beam evaporation, or sputtering techniques. From high-durability anti-reflection (AR) coatings to narrowbandpass filters and high-reflectivity mirrors, our solutions are optimized for laser systems, imaging optics, sensing platforms, and more.

High-performance coatings & filters for optical systems

Small Form-Factor Variable Optical Delay Line

Embedded Image Periscope and Sighting Systems

Environmental, Social and Governance (ESG)

A promotional image featuring a circular optical component with a subtle blue-violet reflective surface, set against a clean white-to-light-gray gradient background. On the left side, two arrow-shaped labels indicate dual manufacturing origins:  The top label includes a Union Jack icon and reads "Made in the UK." The bottom label includes a U.S. flag icon and reads "Made in the USA." The overall layout highlights high-quality optical coatings produced in both the United Kingdom and the United States.

Thin-film optical coating capabilities and temperature stable optical coatings to meet high laser damage thresholds at short pulse lengths across the bandwidth of wavelengths from deep UV through to the far IR.

Optical Coatings

A promotional graphic featuring a single round optical filter with a slight purple tint, displayed against a white-to-light-gray gradient background. On the left side, two arrow-shaped labels point toward the filter:  The top label has a UK flag icon and text reading "Made in the UK." The bottom label has a US flag icon and text reading "Made in the USA." The image emphasizes dual manufacturing origins for the optical filter product, likely targeting international markets with a focus on quality and origin transparency.

Our optical filters redefine performance across industries, enhancing system accuracy in life sciences, transforming military displays, and setting new standards for reliability and versatility.  With a commitment to reliability and excellence, our filters cater to critical applications, ensuring utmost clarity, accuracy, and safety.

Optical Filters

Ilminster Precision Optics Materials Banner, A precision optics workshop with various polishing and lapping machines in operation. The foreground shows a large blue lapping machine with digital controls and rotating platens, surrounded by tools and materials. In the background, technicians work at benches with additional equipment and supplies, all within a well-lit, organized industrial lab setting

Our expertise in optical materials begins with the selection of the correct material to meet the requirements of customers. 

Materials

A selection of superpolished precision optics - A variety of precision optical components displayed on a white surface, including polished lenses, prisms, mirrors, windows, and coated glass elements. The objects are made from transparent and semi-reflective materials in various shapes such as circular, triangular, cylindrical, and rectangular. One notable component is a yellow triangular optic with a central hole, surrounded by smaller components and a gold-toned mechanical part. The surfaces exhibit high clarity and smoothness, showcasing the results of advanced optical superpolishing.

Precision optical components for applications that require high-quality custom optics.

Precision Optics

A close-up of a technician examining a metallic optical component with circular lens positions. The technician is wearing a dark blue cleanroom suit and light blue gloves, working in a reflective foil-lined cleanroom environment. The focus is on precision inspection under controlled conditions, possibly related to optical coating or component quality assurance.

Offering temperature-stable optical coatings to meet high laser damage thresholds at short pulse lengths across the bandwidth of commercial laser wavelengths from deep UV through to far IR.

Optical Coatings & Filters

High-performance coatings & filters for optical systems

Optical Coatings

Optical Filters

Other Precision Optics Products & Services

Materials

Precision Optics

Optical Coatings