A cooled infrared (IR) module is a high-performance electro-optical system that integrates precision infrared optics with a cryogenically cooled detector. By cooling the detector—typically using a Stirling cooler—thermal noise is dramatically reduced, resulting in exceptional sensitivity, higher signal-to-noise ratio (SNR), and superior image quality.
Cooled IR modules are essential in applications where long-range detection, fine temperature discrimination, and high spatial resolution are required.
Optical Module Characteristics
- High-quality infrared optical assemblies with low aberration design
- Advanced anti-reflective (AR) coatings for high transmittance
- Integrated Stirling cooling system, ensuring detector stability
- Optimized opto-mechanical design to manage vibration and thermal load
- Suitable for MWIR spectral band applications
Detector & Optical Parameters
- Spectral Band: Mid-Wave Infrared (MWIR)
- Detector Types: InSb, MCT (HgCdTe), or QWIP (depending on configuration)
- Cooling Technology: Stirling cooler
- Mounting: Ruggedized structure to support cooling assembly and system integration
Integrated Technical Specifications
Detector Options
| Resolution | Pixel Pitch |
|---|---|
| 320 × 256 | 30 μm |
| 640 × 512 | 15 μm |
| 1280 × 1024 | 12 μm |
Performance
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Response Band: 3.7 – 4.8 μm (MWIR)
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NETD (@20 °C):
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≤ 25 mK (320 × 256)
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≤ 20 mK (640 × 512 / 1280 × 1024)
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Frame Rate: 25 Hz / 50 Hz / 100 Hz
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Cooling Method: Stirling cooled
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Cooling Time: < 8 minutes (normal temperature)
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Inhomogeneity: ≤ 0.1% after calibration
Interfaces & Control
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Communication Interface:
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RJ45 standard network port
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RS422 serial port
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Functional Image Controls
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Synchronization: Internal / External / Automatic
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Brightness & Contrast: Manual / Automatic
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Mirroring: Horizontal, Vertical, Diagonal
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Image Algorithms:
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Dimming
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Image enhancement
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Polarity selection
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Filtering
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Non-uniformity correction (NUC)
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Blind pixel removal
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Power & Protection
- Over-voltage protection
- Over-current protection
- Under-voltage protection
- Reverse polarity protection
Environmental Adaptation
- Operating Temperature: −40 °C to +60 °C
- Storage Temperature: −45 °C to +70 °C
- Shock Resistance: 30 g, 11 ms half-sine
- Vibration Standard: GJB 150.16A-2009A, Method 2.3.10
Applications
Cooled IR optical modules are widely used in:
- Military target acquisition & tracking
- Long-range surveillance and reconnaissance
- Space and aerospace research
- Scientific instrumentation
- Advanced industrial thermal analysis
- Border security and maritime monitoring
How to Select a Cooled IR Module
1. Define the Application
- Surveillance, scientific research, tracking, or industrial monitoring
- Required detection range and temperature sensitivity
2. Choose the IR Spectrum
- MWIR: High sensitivity, excellent contrast, suitable for long-range detection
- LWIR: Better performance through smoke and haze (if required)
3. Select Detector Format
- Resolution (320×256 / 640×512 / 1280×1024)
- Pixel pitch for resolution vs. system size trade-off
4. Cooling Technology
- Stirling cooler for high-end performance
- Consider lifetime, vibration, and power constraints
5. Optics Compatibility
- Match focal length and FOV to detector size
- Ensure lens materials support MWIR (e.g. Germanium)
6. Image Processing & Interfaces
- Required onboard processing features
- Compatibility with Ethernet, RS422, or system controllers
7. Environmental & Mechanical Requirements
- Operating temperature range
- Shock and vibration resistance
8. Supplier Support
- Customization capability
- Long-term technical support and reliability