PhotonExport supplies optical windows and stage glass for custom applications where a protective component is necessary to separate two elements. Optical windows and stage glass are available in a wide range of sizes and shapes, and can be supplied with an anti-reflection coating or uncoated, depending on your use-case requirements.
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Optical Window & Stage Glass Manufacturing Specifications
| Commercial | Precision | High Precision | |
| Diameter | Ф3.5~Ф250 | Ф3.5~Ф250 | Ф3.5~Ф250 |
| Diameter Tolerance | 0/-0.02 | 0/-0.015 | 0/-0.001 |
| Thickness Tolerance | ±0.1 | ±0.01 | / |
| Surface Sag | Ra：0.001 | Ra：0.001 | Ra：0.0002 |
| Radius | R5~R∞ | R5~R∞ | R5~R∞ |
| Power (P – V) | N=±5 | N=±2 | N=±1 |
| Irregularity (P – V) | ΔN=1 | ΔN=0.5 | ΔN=0.3 |
| Centering (Beam Deviation) | ≤60″ | ≤30″ | ≤10″ |
| Surface Quality | 60-40 | 20-10 | 10-05 |
Window & Stage Glass Coating Capabilities
| Substrates | All Glass Types |
| Spectral Ranges | 300～3000nm |
| Spectral Edge Tolerance | <1% Deviation, <0.2% Special Cases |
| Bandwidth | 1nm – Broadband |
| Reflection | >0.3% (absolute); <0.2% (average) |
| Laser Damage Threshold | Up to 20 J/cm2@ 20ns Pulses |
| Durability | MIL-STD-810F, Section 507.4; MIL-C-48497A, Section 3.4.1 |