FL50mm F#1.0 LWIR Athermalized Infrared Lens for 640x480-17um Detector

The 50mm F/1.0 Infrared Athermal Lens is a fixed-focus LWIR optic engineered for 640×480–17μm detectors, offering a 12.4°×9.3° field of view that delivers effective mid-to-long-range target acquisition and detail extraction for perimeter defense, coastal surveillance, and critical asset protection. With an F/1.0 aperture and >85% average transmission across the 8–12μm band, the lens ensures robust thermal sensitivity in low-light or adverse weather, while its athermalized design preserves focus integrity from –20°C to +60°C without mechanical adjustment. The compact φ59mm×54.5mm housing, weighing 235g, features an M34×0.5 thread mount and supports a focus range from 3 meters to infinity. Optional DLC and AR coatings are available to tailor surface protection and anti-reflective performance, making this lens a versatile and reliable choice for demanding thermal imaging systems where optical stability and environmental endurance are paramount.

50mm f1.0 Infrared Athermal Lens Parameter