Thermal Imaging Infrared Lens 8-12um LWIR Camera Optics 50mm Focal Length

This thermal imaging infrared lens is a 50mm focal length optic engineered for 8-12um LWIR cameras, the band used by the majority of uncooled thermal imaging systems on the market. The lens is manufactured from germanium with a broadband LWIR anti-reflective coating, delivering transmission above 95 percent and the thermal sensitivity that cameras need to resolve small temperature differences at distance. As a complete thermal imaging infrared lens, it is designed for direct integration into camera modules with standard mounting interfaces.

The optical design uses an athermalized configuration that maintains focus across the operating temperature range of the camera, so image sharpness does not drift when the housing warms up or the ambient temperature changes. Each lens is centered and aligned on the optical axis during assembly, and the finished thermal imaging lens is tested for modulation transfer function at the design wavelength. Custom focal lengths from 13mm to 100mm, F-number options, and manual or motorized focus versions are available for surveillance, industrial, and scientific thermal camera programs.

Selecting the right thermal imaging infrared lens determines the detection range and field of view of the complete camera, because the lens forms the image that the detector converts into a thermal picture. This 50mm LWIR lens balances angular resolution and field coverage for mid-range surveillance and inspection tasks, and the athermalized housing removes the maintenance burden of seasonal refocusing. The lens assembly is cleaned and sealed in a controlled environment before shipment, and each unit is supplied with a protective cap for storage. For volume programs, the same optical design is available in fixed-focus and motorized-focus variants, allowing one camera platform to serve multiple product tiers.