75mm Thermal Imaging Lens

Product Brief Description

This high‑performance 75mm thermal imaging lens is developed and manufactured by ShangHai SILK Optical Technology CO., LTD, optimized for 640×512, 17μm infrared detectors to deliver sharp long‑wave infrared imaging output. Featuring a large aperture F1.0 design, this F1.0 athermal lens realizes reliable optical athermalization without extra electric focusing parts, maintaining stable imaging quality within‑40℃ ~ +80℃ extreme working environment.

With HD exposed‑optics coating, high transmittance up to 88% and over 96% relative illumination, this infrared lens restores uniform brightness across the whole field of view, while low 0.85% distortion minimizes image geometric deviation. The M34×0.75 mechanical mount ensures quick and stable assembly, and IP67 front‑element waterproof rating brings solid dust‑proof and moisture‑proof capability. Weighs only approx.475g, the compact‑structured thermal imaging lens suits integration into various infrared observation devices. ShangHai SILK Optical Technology CO., LTD strictly controls every production procedure, making this infrared lens a dependable optical core for outdoor thermal observation and monitoring tasks.

Product Detailed Description

Parameter Analysis

Focal Length & Aperture: 75mm focal length paired with F1.0 large aperture. Larger aperture gathers more infrared radiation, greatly enhancing signal‑to‑noise ratio for dim‑condition infrared capturing.

Detector Compatibility: Perfectly matches 640×512,17μm uncooled infrared detector, delivering 8.3°(H) ×6.6°(V) field‑of‑view for medium‑long distance observation.

Optical Structure: Adopts optical athermalization design, eliminates thermal defocus caused by wide temperature swing, no motor‑driven focus mechanism required.

Optical Coating & Opto‑index: HD exposed optics coating brings 88% transmittance; relative illumination＞96% ensures uniform image brightness; distortion controlled at merely 0.85% for true‑to‑scene imaging.

Mechanical & Environmental: M34×0.75 standard mount for easy installation; IP67 front‑element ingress protection rating; operating temperature ‑40℃~+80℃; net weight ~475g for lightweight system integration.

Performance Advantages

Stable Athermal Imaging: This thermal imaging lens applies passive optical athermalization technology from ShangHai SILK Optical Technology CO., LTD. It keeps sharp focus from‑40℃ to +80℃, avoids electronic focusing failure risk, lowers whole‑system power consumption and mechanical failure rate.

Superior Optical Performance: High‑transmittance coating on this infrared lens guarantees sufficient infrared energy input. Over 96% relative illumination prevents dark corners; ultra‑low 0.85% distortion avoids target shape deformation for precise target measurement and recognition.

Rugged Environmental Adaptability: IP67 front‑element waterproof grade protects lens core from dust, rain and splash. The solid structure of this F1.0 athermal lens adapts to harsh outdoor climate.

Convenient System Integration: M34×0.75 standardized interface supports fast mechanical fitting. 475g lightweight design reduces payload burden for vehicle‑mounted, airborne and portable infrared equipment.

Reliable Manufacturing Quality: ShangHai SILK Optical Technology CO., LTD completes optical design, lens assembling and performance calibration in‑house, each 17μm detector lens goes through strict temperature cycle and optical inspection before delivery.

Application Fields

Border & Perimeter Security: This thermal imaging lens fits fixed thermal surveillance cameras for long‑range perimeter alert, detecting intruders day and night in total darkness.

Vehicle‑borne Thermal Observation: The F1.0 athermal lens serves for on‑board infrared monitoring systems, performing road hazard detection under bad weather such as fog and night.

Unmanned System Payload: As core optical component for UAV infrared pod, this high‑performance infrared lens supports medium‑distance patrol, forest fire early warning and wild‑life monitoring.

Industrial Temperature Inspection: Match with 640×512 infrared detector for electrical equipment temperature screening, furnace condition monitoring in heavy‑industry scenarios.

Portable Thermal Observation Devices: This 17μm detector lens is integrated into handheld thermal monoculars for search‑and‑rescue, outdoor field operation under complicated weather.