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| Material | Fused Quartz-JGS2 |
| Diameter | 2mm-500mm |
| Width | 2mm-500mm±0.15mm |
| Dimension tolerance | +0/-0.1 |
| Center Thickness | ±0.2mm |
| Center thickness tolerance | 1-5 arc sec |
| Surface Quality | 80/50,60/40,40/20,10/5 |
| Surface Flatness | 1/4 lambda ,1/8 lambda,1/10 lambda |
| Focal Length | ±1mm-±1000mm±1% |
| Effective Aperture | 95% |
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