This 18mm f/1.0 LWIR athermalized thermal lens delivers >93% transmission with <2% distortion for high-contrast thermal imaging in UAV, security, and night vision applications. Passive athermalization and a lightweight 31g aluminum housing ensure stable focus-free operation across -40°C to +80°C with IP67 front sealing. The M25×1 mount and 19mm back working distance enable seamless integration with 384×288-12μm detectors for reliable mid-range detection.
Focal Length: 18mm
Working F‑Number: 1.0
Field of View:(H)14.6° ×(V)11° ×(D)18.2° (Error within ±5%)
Athermalized: Yes
Focus Mode: Fixed Focus
Operating Spectral Band: 8‑12um
Back Working Distance: 19mm
Back Focal Length(BFL): 10mm
Image Plane Size: Φ5.76mm
Applicable Detector: 384*288‑12UM
Spatial Resolution: ≥0.67
mrad Front‑element Coating: AR Coating
Transmittance: ＞93%
Imaging Range: 0.2M ~ +∞
Image‑plane Illumination Uniformity: ＞98%
Distortion: ≤12%
Lens Housing Material: AL 6061
Weight: 31g±5%
Operating Temperature: ‑40℃ ~ +80℃
Storage Temperature: ‑50℃ ~ +85℃
Lens Interface: M25X1‑6g
Sealing Protection: Front‑element IP67
Lens Cap: Front cap and rear cap
