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Home > Products > Prisms > Right Angle Prisms
Fused Silica Right Angle Prism
Fused silica right angle prisms are made of high purity fused silica with excellent optical performance and environmental stability for UV, VIS and NIR wavelengths, especially suitable for laser systems, high precision optics and harsh environments.
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| Fused Silica Material Properties | |
| Parameter | Characteristic |
| Transparent Range | 180nm (deep UV) - 2.2µm (NIR) |
| Refractive Index (@587nm) | ~1.458 |
| Thermal Expansivity | 0.55 × 10⁻⁶ /K (near zero expansion) |
| Heat Stability | Excellent (resistance to sudden changes in temperature) |
| Laser Induced Damage Threshold | High (suitable for UV and high power lasers) |
| Chemical Stability | Resistant to acids, alkalis and corrosion |
| Radiation Resistance | Suitable for space and nuclear environments |
| Comparison of Fused Silica & BK7 Right Angle Prisms | ||
| Characteristic | Fused Silica Right Angle Prisms | BK7 Right Angle Prisms |
| Transparent Range | 180nm – 2.2µm | 350nm – 2.0µm |
| Ultraviolet Performance | Excellent (deep UV applicable) | Poor (<350 nm strong absorption) |
| Heat Stability | Very low thermal expansion (0.55 x 10-⁶/K) | Higher thermal expansion (7.1 x 10-⁶/K) |
| Laser Induced Damage Threshold | High (suitable for excimer laser and femtosecond laser) | Medium low (suitable for He-Ne and visible lasers) |
| Cost | comparatively high | comparatively low |
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