Andover can design and fabricate custom IR long pass filters to suit your particular requirements. Every phase of the process is performed in-house, including thin-film coating design, mechanical design, substrate fabrication and coating, inspection, and environmental testing. 

We can coat a variety of substrate materials, including Germanium, Sapphire, Silicon, Zinc Sulfide, and Zinc Selenide. We can produce custom sizes and shapes as well.

Custom IR Long Pass Filter Benefits

• Useful for isolating broad spectral regions
• Constructed of hard, durable first-surface coatings
• Available in standard and custom wavelengths