Description
IRG206 windows are high-performance infrared optical components fabricated from arsenic-selenide chalcogenide glass. This amorphous optical material exhibits an ultra-broad transmission window spanning 0.8 µm to 19 µm, covering the entire SWIR, MWIR, and LWIR atmospheric windows. With a high refractive index of 2.776 @ 10.6 µm and excellent optical homogeneity, IRG206 serves as a cost-effective alternative to crystalline IR materials. Our windows are precision-machined via Single-Point Diamond Turning (SPDT) and finished to stringent optical tolerances, available with custom broadband anti-reflective (BBAR) coatings for 3–5 µm, 8–12 µm, or dual-band operation.
High Precision Polished Chalcogenide Glass IRG206 Windows
Specifications
| Substrate Material: | Chalcogenide Glass |
|---|---|
| Antireflection Coating: | Uncoated |
| Diameter: | 25 mm |
| Surface Quality: | 60-40 scratch-dig |
| Surface Flatness: | lambda/4 |
| Thickness: | 2 mm |
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Features
- Ultra-Broad IR Transmission: Uninterrupted optical transmission from 0.8 µm to 19 µm, ideal for multi-spectral infrared systems
- High Refractive Index: n = 2.776 @ 10.6 µm, enabling compact optical designs with fewer elements
- Excellent Thermal Stability: Glass transition temperature (Tg) of 180°C, suitable for diverse environmental conditions
- Cost-Effective Machinability: Amorphous structure allows high-volume, low-cost production via precision molding and diamond turning
- Non-Hygroscopic: Chemically inert and stable in humid or industrial environments, requiring no special handling
- Low Dispersion: Consistent refractive index across the IR spectrum, minimizing chromatic aberration
Applications
- Thermal Imaging Cameras: Core optical window for commercial & automotive LWIR (8–12 µm) imaging systems
- Infrared Spectrometers (FTIR): High-transmission substrate for broadband infrared spectroscopy
- Surveillance & Security: Multi-spectral IR windows for border control and defensive systems
- Automotive Driver Assistance: Infrared windows for night-vision and pedestrian detection
- Laser Systems: Protective windows for CO₂ lasers (10.6 µm) and low-to-medium power IR lasers
- Industrial Process Monitoring: IR windows for non-contact temperature measurement and thermal inspection
- Medical Infrared Devices: Optical components for diagnostic and analytical IR instrumentation
Frequently Asked Questions
How does IRG206 compare to ZnSe or Ge windows?
IRG206 offers a wider transmission range than ZnS and similar LWIR performance to ZnSe, at a lower cost than crystalline Ge.
What are the key mechanical properties of IRG206?
Density is 4.63 g/cm³, Tg = 180°C, and thermal expansion coefficient is ~2.05 × 10⁻⁵/K.
Why choose IRG206 over crystalline IR materials?
IRG206 combines broad IR transmission, easy machinability, and cost efficiency, perfect for high-volume IR optics.
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