FL35mm F#1.0 Long Wave Infrared Manual Focus Germanium Lens for 640x512-12um Sensor

The FL35mm F1.0 LWIR Manual Focus Lens is a premium germanium-based infrared optic engineered specifically for 640×512–12μm thermal cores. Its fast F/1.0 aperture and >88% average transmission across the 8–12μm band ensure outstanding thermal sensitivity and signal-to-noise ratio, delivering crisp, high-definition imagery even in marginal weather or low thermal-contrast scenarios. The lens provides a well-balanced 12.5°×10° field of view with manual focus adjustment from 3 meters to infinity, making it a versatile choice for medium-range targeting, perimeter surveillance, and drone-based inspection missions that demand precise focus control and reliable optical performance.

Built with a rugged yet lightweight housing measuring φ67mm×46.9mm and weighing only 150g, this lens offers excellent mechanical integration flexibility for both handheld and fixed-mount systems. It features a back focus distance of 5.76mm and operates stably between –20°C and +80°C, with extended storage capability from –40°C to +80°C. Optional DLC and AR coatings are available to tailor surface protection and transmission enhancement according to specific application needs, ensuring durability and adaptability across diverse operational environments without compromising image quality.

Infrared Manual Focus Lens Parameter