High Durability Anti-Reflection (AR) Coated Sapphire Windows
Original price was: $102.50.$71.75Current price is: $71.75.
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High Durability Anti-Reflection (AR) Coated Sapphire Windows are designed for applications requiring the ruggedness of sapphire with AR coatings designed to survive severe abrasion. The AR coatings on these sapphire windows are designed to withstand temperature cycling from -80 to +160°F, salt spray for a continuous period of 24 hours, and salt solubility for an immersion period of 24 hours. Coating designs achieving the severe abrasion requirements of MIL-C-675C for VIS-NIR and MWIR applications are available, making them ideal for use in harsh environments. High Durability Anti-Reflection (AR) Coated Sapphire Windows are used in aerospace, defense, and industrial applications, as well as any optical application requiring thin, durable protective windows.
- Achieves Severe Abrasion Requirements of MIL-C-675C
- Low Reflection Coatings for 400 – 1100nm or 2000 – 5000nm
- Ideal for Harsh Environments Requiring Thin Optics
- Uncoated Sapphire Windows are Also Available
| Abbe Number (vd) | 72.24 |
|---|---|
| Substrate | Sapphire (Al2O3) |
| Coating Temperature (°F) | -80 to +160 per MIL-M-13508C Paragraph 4.4.4 |
| Coating Salt Spray | ≥24 Hours per MIL-C-675C paragraph 4.5.9 |
| Coating Salt Solubility | ≥24 Hours Immersion per MIL-C-675C paragraph 4.5.7 |
| Coating Humidity | ≥24 Hours per MIL-C-675C paragraph 4.5.8 |
| Coating Adhesion | Per MIL-M-13508C Paragraph 4.4.6 |
| Coating Abrasion | Severe, per MIL-C-675C Paragraph 4.5.10 |
| Young's Modulus (GPa) | 435 |
| Surface Quality | 80-50 |
| Surface Flatness (P-V) | 2λ (typical) |
| Poisson's Ratio | 0.27 |
| Axis Orientation | Random |
| Parallelism (arcmin) | ≤3.5 |
| Knoop Hardness (kg/mm2) | 1900 |
| Index of Refraction nd | 1.77 |
| Edges | Fine Ground |
| Density (g/cm3) | 3.97 |
| Coefficient of Thermal Expansion CTE (10-6/°C) | 8.8 |
| Clear Aperture (%) | 90 |
| Birefringence (no-ne) | 0.008 for Visible Light Orthogonal to Optical Axis |
| Bevel | Protective as needed |
| Type of Window | Crystal |
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