Infrared Optical Filters
IR Interference Filters: 1.5 - 20 µm

Northumbria Optical Coatings Ltd (NOC) was established in 1995, specializing in the design and manufacture of Infrared Optical Filters and Coatings, covering the spectral range 1.5µm – 20.0µm. Before 1995 NOC operated as a business unit for Rolls Royce International Research & Development based in Newcastle upon Tyne.

NOC offers competitively priced standard and non-standard filters. These filters are used in many applications including environmental monitoring, analysis and control of gaseous effluent, analysis of vehicle exhaust gases, ozone layer monitoring, night vision systems and space applications.

Filter Applications
Northumbria Optical Coatings manufactures a wide range of Infrared Optical Filters and Coatings for numerous applications. These include:

• Environmental monitoring
• Analysis and control of gaseous effluent from stacks
• Detection instruments and safety systems on oil rigs
• Security systems
• Analysis of vehicle exhaust gases for MOT requirements
• Spectroscopy
• Ozone layer monitoring
• Blood alcohol meters (Breathalyzers)
• Infrared cameras
• Avionics
• Space applications

Standard NBP Filters
There are a number of standard Narrow Band Pass (NBP) available from NOC.

Filter and Coating Types

Narrow Band Pass (NBP)

Wide Band Pass (WBP)

Long Wave Pass (LWP)

Short Wave Pass (SWP)

Neutral Density

Anti-Reflection (AR)

Technical Notes

The applications for optical thin film filters are so diversified that filter characteristics are dependent on considerations such as the kind and intensity of the source, detector characteristics, and optical path geometry. NOC will assist you in selecting a suitable standard filter or in establishing the specifications for a custom-made filter.

Glossary of Filter Terms (PDF)

Filter Technology

Temperature Shift

Angular Shift

Filter Sizes

Filter Holders Drawings

Military Specifications