Variable Neutral Density Filter | |
Material | BK7 |
Diameter Tolerance | +0.0/-0.2mm |
Clear Aperture | >90% |
Thickness Tolerance | ±0.2mm |
Surface Quality | 60/40 scratch and dig |
Flatness | <2λ@632.8nm |
Parallelism | <3 arc min |
Chamfer | |
OD Tolerance | ±5% of OD Extremes |
Design Wavelength | 400-700nm |
Coating | Metallic reflective coating |
Coating Area | 0-270° |
Wavefront Distortion | <λ/8@632.8nm |