JGS3 is an infrared-grade synthetic fused silica glass made by vacuum electrofusion with nearly zero hydroxyl content. It offers high transmittance from 260 nm to 3500 nm, no absorption at 2600–2800 nm, and excellent thermal stability. Widely used for IR windows, detectors, laser components and aerospace optical systems.
Thermal shock resistance
Visible and near-infrared dual-band transmission
Not suitable for ultraviolet use
| Comparison Item | JGS1 | JGS2 | JGS3 |
| Material Type | Synthetic fused silica (high hydroxyl) | Synthetic fused silica (low hydroxyl) | Natural fused silica (ultra-low hydroxyl) |
| UV Transmittance | Best deep UV performance | Good mid-UV performance | Weak UV transmittance |
| Infrared Transmittance | Strong infrared absorption | Good infrared transmittance | Optimal infrared transmittance |
| Typical Transmission Band | 185nm - 2500nm | 220nm - 3000nm | 260nm - 3500nm |
| 193 / 248 nm Deep UV | Applicable (lithography / UV instruments) | Not suitable for deep UV | Not applicable |
| Laser Resistance | Conventional UV laser | Stable for UV & visible laser | Preferred for high-power infrared laser |
| Thermal Stability | Excellent | Superior | Top-tier, high temperature aging resistance |
