35mm Thermal Imaging Lens

Product Brief Description

This high‑performance 35mm thermal imaging lens is developed and manufactured by ShangHai SILK Optical Technology CO., LTD, tailored for long‑wave infrared thermal imaging devices working within 8‑12μm spectral band. Boasting a large F1.0 aperture, this infrared lens delivers outstanding light‑gathering capability to secure clear thermal imaging output under low‑light and complex ambient conditions. Compatible with 640×512, 12μm uncooled infrared detectors, the thermal imaging lens supports 2m‑infinity focus range to adapt to both near‑distance observation and long‑range monitoring scenarios. Front element reaches IP67 ingress protection rating, enabling stable operation in harsh outdoor environments. With high transmittance above 92% and low distortion performance, this optical component guarantees uniform image quality across the whole field of view. ShangHai SILK Optical Technology CO., LTD strictly implements optical optimization for this lens, making it a reliable optical solution for industrial monitoring, perimeter security and other infrared thermal vision systems.

Detailed Product Description

1. Parameter

Focal Length & Aperture: 35mm focal length paired with F1.0 large aperture. The big aperture greatly improves luminous flux, which is critical for weak‑signal capture of long wave infrared lens.

Detector Compatibility: Matches 640×512,12μm detector, perfectly adapting mainstream uncooled infrared lens hardware for mass‑level thermal cameras.

Optical Index: Transmittance ≥92%, relative illumination ≥90%, distortion ≤‑1.5%. HD exposed optics coating reduces infrared reflection loss for the thermal imaging lens.

Focus & Field of View: 12.5°(H)×10.3°(V) field of view, focus range from 2m to infinity, supporting both close‑range inspection and long‑distance observation.

Mechanical & Environmental Spec: M34×0.75 mount for convenient assembly; front‑side IP67 waterproof rating; operating temperature‑40℃ ~ +80℃. The 8‑12μm working wavelength fits standard LWIR thermal imaging requirements.

Manufactured by ShangHai SILK Optical Technology CO., LTD, every parameter of this infrared lens is calibrated for practical field deployment.

2. Performance Advantages

Superior Infrared Light Utilization: As a high‑grade thermal imaging lens, ≥92% transmittance minimizes infrared signal loss; HD anti‑reflection coating further enhances signal receiving efficiency for the long wave infrared lens.

Excellent Image Uniformity: ≥90% relative illumination ensures consistent brightness across the whole image frame, no obvious dark corners for the infrared lens. Distortion ≤‑1.5% preserves real‑scene geometry for monitoring outputs.

Rugged Outdoor Adaptability: IP67 front‑element protection for the thermal imaging lens resists dust, rain and splash. Wide‑range working temperature‑40℃~+80℃ supports stable operation in frigid winter and high‑temperature outdoor environments.

Flexible Focus Adjustment: 2m‑∞ focus range allows the uncooled infrared lens to switch between short‑range spot checking and long‑range surveillance without lens replacement.

Standardized Interface: M34×0.75 thread mount simplifies camera integration, helping customers fast assemble this thermal imaging lens into finished thermal devices.

ShangHai SILK Optical Technology CO., LTD performs strict optical testing for every unit of this infrared lens before delivery.

3. Application Fields

Perimeter Surveillance & Border Defense: This thermal imaging lens serves for outdoor thermal cameras for 24h all‑weather intrusion detection; the large‑aperture infrared lens captures heat signatures day and night without visible light.

Industrial Condition Monitoring: The long wave infrared lens fits equipment over‑heat inspection, power‑grid equipment thermal inspection; IP67 capability allows the uncooled infrared lens to work in outdoor industrial sites.

Security & Traffic Monitoring: The thermal imaging lens is integrated into thermal surveillance cameras for traffic flow monitoring, abnormal heat source alarm in tunnels and road sides.

Fire Prevention & Early Warning: The 8‑12μm infrared lens detects early‑stage fire heat signatures for forest fire prevention and warehouse risk monitoring.

Vehicle‑borne Thermal Observation: Rugged structure of this thermal imaging lens adapts vehicle‑mount thermal systems for all‑weather reconnaissance.

ShangHai SILK Optical Technology CO., LTD provides customizable technical support for customers applying this infrared lens in above‑mentioned scenarios.