A high-performance infrared lens engineered specifically for demanding industrial applications such as precision temperature measurement and gas detection. Featuring an ultra-fast F0.8 aperture—one of the brightest in its class—it delivers significantly higher light throughput than conventional lenses, dramatically enhancing weak-signal detection sensitivity and thermal measurement accuracy. Optimized for 400×300 resolution with 25μm pixel pitch, the lens provides a field of view of 22.64° (H) × 17.03° (V), ideal for medium-range monitoring tasks in industrial settings. With relative illumination as high as 95% and TV distortion controlled to just ±1%, it ensures exceptionally uniform brightness and geometric fidelity, enabling true-to-life, stable thermal imaging critical for analytical applications. The optical design includes a 3.96 mm mechanical back focal length (BFL) and a 12.5 mm image circle, offering excellent compatibility with mainstream uncooled microbolometer sensors used in industrial systems. Built for harsh environments, this lens meets the stringent requirements of high-precision, high-reliability industrial operations—where every degree and every detail matters.