75mm focal length Thermal Imaging Lens

Product Brief Description

This high‑performance 75mm thermal imaging lens is independently developed and manufactured by BOSHI Optical Technology. This thermal imaging lens is optimised to pair with 640×512 thermal 17μm infrared detectors to realise high‑definition long‑wave infrared imaging output. It adopts large aperture F1.0 design. This optical athermalization lens delivers steady optical athermalization effect without additional electric focusing assemblies and maintains consistent imaging quality across extreme working temperature ranging from 40 degrees below zero up to 80 degrees centigrade. Equipped with high‑definition exposed‑optics coating, the lens achieves transmittance as high as 88 percent and relative illumination above 96 percent to realise even brightness distribution for full field of view. Its distortion value is controlled at 0.85 percent to reduce geometric deviation of captured images. It applies M34 mounting standard to support fast and stable assembly work. Front‑element IP67 rating offers outstanding dust‑proof and moisture‑proof performance. With net weight around 475 grams, this compact IR lens supports seamless integration for multiple infrared observation devices. Strict production quality control implemented by BOSHI Optical Technology makes this long wave infrared objective a reliable optical core component for outdoor thermal observation and monitoring work.

Product Detailed Description

Parameter Analysis

1. Focal Length and Aperture. This thermal imaging lens features 75mm focal length together with F1.0 large aperture. Larger aperture collects more infrared radiation energy. It can effectively lift signal‑to‑noise ratio for infrared image capturing under low‑light working conditions.

2. Detector Compatibility. This 17μm detector lens achieves perfect matching effect with 640×512 thermal uncooled infrared detector. It delivers 8.3 degree horizontal and 6.6 degree vertical field of view to satisfy observation demands of medium‑long distance scenarios.

3. Optical Structure. The IR lens adopts optical athermalization lens design scheme. It offsets thermal defocus phenomenon triggered by wide temperature variation and removes requirement for motor driven focus structure.

4. Optical Coating and Optical Index. High‑definition exposed‑optics coating brings 88 percent transmittance. Relative illumination value higher than 96 percent guarantees homogeneous brightness across whole imaging area. Distortion index keeps at 0.85 percent to restore real scene features for imaging output.

5. Mechanical and Environmental Specifications. It follows M34 mounting specification for convenient installation operation. Front‑element reaches IP67 ingress protection level. Its working temperature scope covers from minus 40 degree centigrade to plus 80 degree centigrade. Net weight sits near 475 grams to facilitate lightweight system integration.

Performance Advantages

1.Stable Athermal Imaging Capacity. BOSHI Optical Technology applies passive optical athermalization technology on this long wave infrared objective. The 75mm thermal imaging lens maintains sharp focusing status within full working temperature scope. It avoids failure risks brought by electronic focusing parts. It also cuts overall system power consumption and lowers mechanical malfunction probability.

2. Excellent Optical Performance. High‑transmittance coating of this F1.0 thermal imaging lens ensures sufficient infrared energy input. Relative illumination over 96 percent eliminates dark corner issue for imaging frame. Ultra‑low 0.85 percent distortion prevents target shape deformation. It lays solid foundation for accurate target measurement and identification work.

3. Strong Environmental Adaptability. IP67 front‑element protection rating shields core part of this optical athermalization lens against dust, rain and water splash. Robust mechanical structure enables the IR lens to cope with complex and harsh outdoor climate conditions.

4. Friendly System Integration Property. Standardised M34 interface enables rapid mechanical assembly operation. 475 gram lightweight feature decreases payload pressure for vehicle‑mounted equipment, airborne devices as well as portable infrared apparatus.

5. Trustworthy Production Quality. BOSHI Optical Technology finishes optical design, lens assembly and performance calibration inside factory. Every 17μm detector lens will go through rigorous temperature cycle test and optical performance inspection before product delivery

Application Fields

1. Border and Perimeter Security. This thermal imaging lens can be assembled inside fixed thermal surveillance cameras. It supports long‑distance perimeter alert function. The 640×512 thermal matching lens detects intruders day and night even under total darkness environment.

2. Vehicle‑borne Thermal Observation. This F1.0 optical athermalization lens serves as core component for vehicle‑mounted infrared monitoring system. It executes road hazard detection task under foggy weather, night time and other poor visibility conditions.

3. Unmanned System Payload. As key optical unit of UAV infrared pod, this 75mm long wave infrared objective carries out medium‑distance patrol work. It supports forest fire early warning mission and wildlife monitoring business.

4. Industrial Temperature Inspection. Cooperated with 640×512 thermal infrared detector, this IP67 rated IR lens supports temperature screening for electrical equipment. It also monitors furnace operating condition for heavy‑industry application scenarios.

5. Portable Thermal Observation Devices. This 17μm detector lens can be integrated into handheld thermal monocular. It delivers reliable optical performance for search‑and‑rescue operation as well as outdoor field missions under complicated weather conditions.