China Longwave Athermal Lenses 25mmFL F#1.2 17um Manufacture and Factory

Longwave Athermal Lenses 25mmFL F#1.2 17um

This 25mm F1.0 long-wave infrared (LWIR) lens is optimized for 8–14μm thermal imaging, designed for use with 640×480 (17μm) and 384×288 (25μm) uncooled detectors. With a fast F1.0 aperture and 30° circular FOV, it delivers bright, high-contrast thermal images for industrial monitoring, night vision, and temperature measurement applications.

Key Features

◆ LWIR-Optimized Performance: Tuned for the 8–14μm spectral range, ideal for thermal cameras and infrared imaging systems.
◆ Fast F1.0 Aperture: Maximizes light gathering efficiency, ensuring clear thermal imaging even in low-contrast scenes.
◆ High Transmission: 90% average transmission with AR coating at 8–14μm for maximum infrared throughput.
◆ Versatile Compatibility: Works with both 640×480 (17μm) and 384×288 (25μm) detectors, offering flexible integration options.
◆ Compact & Lightweight: 35mm length, Ø39mm diameter, and only 80g weight for easy installation in thermal camera systems.
◆ IP67 Front Lens Protection: Dustproof and waterproof front lens, suitable for outdoor and harsh industrial environments.
◆ Adjustable Focus: Manual focus control with a focus range from 1m to infinity, ensuring sharp thermal imaging at any distance.
◆ Standard Mount: M34×0.75 interface for seamless integration with most thermal camera bodies.

Specifications

Opto-Mechanic Property	Specification
Focal Length	25mm
F/#	1.0
Wavelength	8–14μm
Circular FOV	30°
Image Diagonal	13.6mm
Average Transmission	90%
Back Focus Distance	16mm
Back Working Distance	11mm
Dimensions	Length 35mm, Ø39mm
Focus Type	Manual Focus
Focus Range	1m to infinity
Mount Type	M34×0.75
Detector Compatibility	640×480 (17μm), 384×288 (25μm)
External Coating	AR@8–14μm
Weight	80g
Sealing	IP67 (Front Lens only)