FL50mm F1.0 Athermalized Infrared Lens for 640x480-17um Detector With DLC Coating

The 50mm F/1.0 LWIR Athermal Lens is a high-performance fixed-focus infrared optic tailored for 640×480–17μm detectors, striking an effective balance between reach and field coverage with its 12.4°×9.3° field of view—well-suited for mid-to-long-range observation, border surveillance, and infrastructure monitoring where target discrimination is essential. Its F/1.0 aperture and >88% average transmission across the 8–12μm band combine to deliver robust thermal signal capture even in low-contrast or hazy conditions, while the athermalized construction ensures reliable focus stability from –40°C to +80°C without user intervention. Housed in a φ56mm×62.4mm barrel weighing just 99.3g, the lens features an M30×0.5-6g mount for straightforward system integration and a focus range extending from 3 meters to infinity. An optional DLC coating is available to fortify the front surface against scratches, abrasion, and corrosive elements, making this lens a durable, low-maintenance solution for both ground-based and airborne thermal imaging platforms where consistent performance across extreme temperature swings is non-negotiable.

50mm f1.0 lwir athermal lens parameter