4.6mm F1.0 640×512 M19-3 LWIR thermal infrared camera lens
Table of Contents
Overview
The 4.6mm F1.0 640×512 M19-3 LWIR thermal infrared camera lens is a high-performance, uncooled infrared lens designed specifically for thermal imaging applications. Featuring an ultra-fast F-number of 1.0 and a wide field of view, this compact lens is optimized for 640×512 resolution detectors with a 12μm pixel pitch. Its robust athermalized optical design ensures consistent image quality across a wide temperature range (-40°C to +60°C), making it ideal for demanding outdoor and industrial environments. With an IP67 sealing rating and lightweight construction, it offers durability and ease of integration into various thermal camera systems.
Features
- Ultra-Low Light Performance: Bright F/1.0 aperture allows for maximum infrared light collection, enhancing sensitivity in low-contrast scenes.
- Wide Field of View: Diagonal FOV ≥100°, providing extensive coverage for surveillance and monitoring.
- Athermalized Design: Optical athermalization maintains focus and image clarity without mechanical adjustment across extreme temperatures.
- High Transmission & Uniformity: Average transmittance ≥90% and relative illumination >80% ensure bright, clear, and uniform images.
- Rugged & Compact: Lightweight (<26g) and small form factor (≤φ24mm × L26mm) with IP67 ingress protection against dust and water.
- Broad Spectral Range: Optimized for the standard long-wave infrared (LWIR) band of 8~12μm.
- Flexible Focus: Continuous focus range from 0.3m to infinity.
Specifications
| Parameter | Specification |
|---|---|
| Focal Length (FL) | 4.6 mm |
| F-Number (F/#) | 1.0 |
| Compatible Detector | 640 × 512, 12μm pixel pitch |
| Field of View (FOV) | ≥ 100° (Diagonal) |
| Spectral Band | 8 ~ 12 μm |
| Relative Illumination | > 80% |
| Average Transmittance | ≥ 90% |
| Focus Mechanism | Optical Athermalization |
| Focus Range | 0.3 m ~ ∞ |
| Coating | AR Coating (Anti-Reflective) on exposed surface |
| Back Focal Distance | 4.65 mm ± 0.2 mm |
| Weight | < 26 g |
| Dimensions | ≤ φ24 mm × L26 mm |
| Operating Temperature | -40°C ~ +60°C |
| Storage Temperature | -45°C ~ +65°C |
| Mount Interface | Rear flange mount (Lens thread: M19 × 0.5 – 6g) |
| Sealing Rating | IP67 |
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Applications
Due to its wide angle, high sensitivity, and rugged design, this lens is suitable for:
- Security & Surveillance: Perimeter protection, wide-area monitoring, and night vision systems.
- Industrial Inspection: Monitoring large equipment, electrical panels, and manufacturing processes.
- Firefighting & Rescue: Thermal imaging cameras for seeing through smoke and detecting heat sources in wide environments.
- Automotive & Transportation: Pedestrian detection, night driving assistance, and blind-spot monitoring systems.
- Unmanned Aerial Vehicles (UAVs): Lightweight payload for aerial thermal mapping and search operations.
Frequently Asked Questions (FAQ)
Q1: What detector resolution is this lens compatible with?
A: It is specifically designed for uncooled infrared detectors with a resolution of 640 × 512 and a pixel pitch of 12μm.
A: It is specifically designed for uncooled infrared detectors with a resolution of 640 × 512 and a pixel pitch of 12μm.
Q2: Does the lens require manual refocusing when the temperature changes?
A: No. The lens features an optical athermalization design, which automatically compensates for temperature fluctuations between -40°C and +60°C, maintaining focus without mechanical intervention.
A: No. The lens features an optical athermalization design, which automatically compensates for temperature fluctuations between -40°C and +60°C, maintaining focus without mechanical intervention.
Q3: Can this lens be used in rainy or dusty environments?
A: Yes, the lens has an IP67 sealing rating, making it dust-tight and protected against temporary immersion in water, suitable for harsh outdoor conditions.
A: Yes, the lens has an IP67 sealing rating, making it dust-tight and protected against temporary immersion in water, suitable for harsh outdoor conditions.
Q4: What is the closest focusing distance?
A: The lens can focus on objects as close as 0.3 meters, extending to infinity.
A: The lens can focus on objects as close as 0.3 meters, extending to infinity.
Q5: What type of mounting interface does it use?
A: It utilizes a rear flange mount with a specific thread size of M19 × 0.5 – 6g. Ensure your camera housing supports this interface.
A: It utilizes a rear flange mount with a specific thread size of M19 × 0.5 – 6g. Ensure your camera housing supports this interface.
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