China 25mm F1.0 LWIR Athermal Lens | Chalcogenide Glass 8-12um Optics for 640×512 Sensors Manufacture and Factory

25mm F1.0 LWIR Athermal Lens | Chalcogenide Glass 8-12um Optics for 640×512 Sensors

The A-f25F1.0-640-17 is a premium 25mm F1.0 Long-Wave Infrared (LWIR) thermal imaging lens, specifically engineered for 640×512 uncooled detectors with 17μm pixel pitch. Designed to deliver exceptional thermal sensitivity in demanding environments, this lens features a large F1.0 aperture that maximizes light collection, ensuring crisp, high-contrast images even under low-light conditions.

Model: A-f25F1.0-640-17

Applicable: Long-Wave Infrared Uncooled Detector

Focal Length：25mm

F/#：1.0/1.2

Circular FOV：24.5°(H)×19.7°(V)

Spectral Range：8-12μm

Focus Type：Fixed Focus

BFL：17.7mm

Mount Type：M34*0.5

Detector：640×512-17μm

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To achieve superior thermal stability, this lens is engineered using precision-molded Chalcogenide Glass (rather than traditional Germanium). The unique temperature coefficient of refractive index (dn/dt) of Chalcogenide glass, combined with advanced optical design, compensates for thermal defocus automatically. This guarantees that the F1.0 large aperture delivers consistently sharp, high-contrast thermal images in extreme cold or heat, from -40°C to +80°C.

Applications:

Unmanned Aerial Vehicles (UAVs), border surveillance, forest fire prevention, long-range security monitoring, and industrial automated thermography requiring ultimate stability and low maintenance.