Material | BK7 or UV fused silica |
Diameter Tolerance | +0/-0.15mm |
Thickness Tolerance | ±0.25mm |
Clear Aperture | >Central 85% of diameter |
Parallelism | <5″ |
Surface Quality | 20/10 |
Transmitted Wavefront | λ/10 @632.8nm |
Chamfers | 12.7 & 25.4mm:0.25-0.75mm face width x 45°±15°
50.8mm:0.38-1.14 mm face width x 45°±15° |