Product Description 19mm F1.0 M22 12um AR Lens Long-wave Infrared Thermal Imaging Lens
BOSHI LENS  is a leading China Standard M12 Lens manufacturer, supplier and exporter. Adhering to the pursuit of perfect quality of products, so that our Standard M12 Lens have been satisfied by many customers. Extreme design, quality raw materials, high performance and competitive price are what every customer wants, and that's also what we can offer you. We will provide you with the best after-sales service and timely delivery.

I. Detailed Interpretation of Core Parameters

1. In-depth Parameter Breakdown

1. 19mm Focal Length, Ultra-Large Aperture F1.0

F1.0 is a rare large aperture among LWIR lenses, delivering much higher luminous flux than conventional F1.4/F1.8 models and significantly improving signal-to-noise ratio for low-temperature faint heat sources.

The 19mm long focal length narrows the field of view and magnifies distant targets, specialized for fine-grained long-distance temperature measurement and surveillance that requires clear detail recognition.

2. Operating Wavelength: 8~12μm

Standard atmospheric transmission window for long-wave infrared, compatible with uncooled vanadium oxide thermal camera cores for thermal imaging & temperature measurement of human bodies, electrical equipment and machinery.

3. Compatible Detector: 640×512, 12μm Pixel Pitch

Matches mainstream industrial uncooled infrared cores from Guide, Hikvision, Dahua, Dali and other manufacturers. The 12μm pixel pitch balances imaging resolution and overall equipment cost.

4. Horizontal Field of View: 22.85°

Narrow FOV characteristic: targets appear larger at equal observation distances, revealing subtle thermal details from afar. Optimized for fixed-point long-distance monitoring rather than wide-area panoramic coverage.

5.Focus Range: 0.5m ~ ∞

Ultra-short minimum focus distance of 0.5m enables close-up inspection of tiny components, while infinity focusing supports long-range patrols, covering both micro-component thermal testing and large-area remote inspection in one lens.

2. Core Image Quality Metrics

1.AR Anti-Reflection Coating on Exposed Optics + Transmittance ≥90%

Custom anti-reflection coating optimized for 8–12μm band. The ≥90% full-wave transmittance outperforms the industry average of 70%~85%, maximizing infrared energy capture to detect faint heat spots, with minimal glare and ghost images under intense light.

2.Relative Illumination ≥86%

Image corners retain 86% of central brightness with negligible edge brightness falloff. The uniform frame eliminates temperature reading errors at edges and avoids noise spikes caused by forced software brightening of peripheral areas during large-area scanning.

3.Distortion < -10%

The negative value indicates barrel distortion, a common tradeoff for long-narrow-FOV infrared lenses. It sacrifices slight geometric linearity to achieve superior transmittance and relative illumination. This lens is optimized for temperature detection and target identification, not high-precision dimensional measurement.

3. Environmental & Mechanical Design

1.Mount: M25 × 0.5

Standard threaded interface dedicated to long-focus infrared lenses, offering seamless integration with all 640-pixel long-wave thermal camera cores.

2.Front Element Ingress Protection Rating: IP67

Built-in dustproof and waterproof protection for the front lens element. It can be deployed outdoors without additional protective windows, resisting rain splashes and sandstorms while simplifying the structural design of outdoor devices.

3.Operating Temperature: -40℃ ~ +80℃

Ultra-wide temperature tolerance range that covers frigid northern winters, sweltering summer heat and high-temperature industrial workshops. It maintains stable focus and intact coating without delamination or defocusing under extreme temperature fluctuations for year-round round-the-clock operation.

II. Core Performance Advantages

Advantage 1: Class-Leading Infrared Light Transmission: F1.0 Large Aperture + ≥90% Ultra-High Transmittance

Few long-focus infrared lenses of equivalent specification reach 90% transmittance. Combined with the F1.0 ultra-large aperture, it delivers industry-leading sensitivity for detecting faint long-distance heat sources such as minor wire overheating and hidden equipment temperature rises, with crisp imaging of low-temperature targets.

Advantage 2: Superior Frame Uniformity for Accurate Edge Temperature Readings

The ≥86% ultra-high relative illumination minimizes brightness attenuation at image corners. When scanning large arrays of equipment like photovoltaic panels and switch cabinets, temperature values at frame edges remain consistent without obvious deviation.

Advantage 3: Dual-Range Focus for Macro & Long-Distance Scenarios

The 0.5m close-focus capability enables thermal inspection of circuit boards, tiny wiring terminals and bearings, while long-distance infinity focusing supports multi-kilometer patrols. A single lens fulfills both precision micro-component testing and remote fixed-point inspection.

Advantage 4: All-Weather Outdoor Robustness & Wide-Temperature Stability

IP67 front lens protection paired with -40~+80℃ wide operating temperature allows direct deployment in harsh environments including mines, substations, wilderness and tunnels, with no risk of focus drift or coating peeling under extreme temperatures.

Advantage 5: Long-Focus Narrow FOV for Magnified Long-Distance Details

Compared with shorter 13mm lenses, the 19mm focal length and 22.85° narrow FOV provide higher target magnification at the same distance, ideal for identifying tiny thermal defects including damaged insulators, broken wire strands and subtle equipment hot spots from far away.

III. Target Application Fields

1.Power Grid Inspection (Primary Application)

·Long-distance temperature measurement for high-voltage transmission lines & poles: The 19mm long focal length magnifies insulators and wire joints thousands of meters away, while F1.0 high transmittance captures faint overheating defects. IP67 protection and wide temperature tolerance adapt to mountainous outdoor substations.

·PV panel hot spot detection: High relative illumination guarantees precise temperature readings across panel edges, and ≥90% transmittance detects faint battery hot spots.

·Precision thermal testing of high-voltage switchgears & transformers: 0.5m minimum focus supports close-up scanning of hidden temperature anomalies on compact electrical components.

2. Predictive Maintenance for Precision Industrial Equipment

·Remote monitoring of motors, bearings and metallurgical machinery: Tolerates ambient temperatures up to +80℃ to scan full production lines from afar and pre-alert overheating failures.

·Inspection of electronic components & energy storage battery cabinets: 0.5m macro focusing pinpoints subtle thermal abnormalities on circuit boards and battery cells.

·Heat leakage patrol for long-distance chemical pipelines & storage tanks: Scans full pipeline routes remotely to detect minor insulation damage and heat loss points.

3.Long-Range Outdoor Security & Border Surveillance

·Fixed-point perimeter early warning for oilfields, mines and industrial parks: Narrow FOV locks onto distant hills and boundary walls to detect intruding personnel and vehicles by their thermal signatures.

·All-weather night vision for border & coastal defense: -40℃ low-temperature resistance suits frigid wilderness, and IP67 protection delivers stable imaging through rain, snow and sandstorms.

4. Rail Transit & Vehicle-Mounted Infrared Monitoring

·Long-distance thermal inspection of high-speed railway contact wires: Long focal length magnifies overhead cables to detect overheating on contact lines and positioning hardware; the front lens resists fog and dust from tunnel environments without fogging.

·Remote temperature testing of steel rails & fasteners, plus long-focus night vision assistance for onboard systems.

5.Forest Fire Prevention & Natural Resource Monitoring

Forest fire monitoring via ground pan-tilt units or UAVs: Identifies early smoldering hidden in woods several kilometers away. High transmittance captures faint low-temperature fire sources for advanced wildfire early warning.

6. Special Equipment Emergency Inspection

Long-distance thermal observation of fire scenes, hidden high-temperature hazard screening in large warehouses, and remote thermal monitoring of heavy port machinery.

IV. Product Tradeoff Explanation (Limitation Note)

The significant barrel distortion (<-10%) renders this lens unsuitable for applications requiring high-precision dimensional measurement or geometric mapping. Its optical design prioritizes transmittance, edge uniformity and long-distance temperature detection sensitivity, optimized purely for thermal measurement and target recognition scenarios.

Our Starlight Lens can be installed in Smart home webcam, artificial intelligence camera.

19mm F1.0 M22 12um AR Lens Long-wave Infrared Thermal Imaging Lens Security Monitoring Starlight Lens, Standard M12 threaded interface Lens, with 2.0 F/NO, 6G structure, more lightweight, with high cost-effectiveness! If you are interested in our Standard Starlight Lens, you can consult us now, we will reply to you in time!

The product has the following specific characteristics：

1. Product features: Made of all plastic material, while ensuring the quality of the products, we can offer customers a lower purchase price..

2. Product advantages: Large angle, small size, Wide depth of field range.

We are eagerly awaiting your purchase and look forward to providing you with the best cooperation experience and deeper business collaboration.