漸變中性密度濾光片
可變中性密度濾波器通過圍繞其中心旋轉濾波器來提供光的連續可變的線性衰減。這是衰減光的經濟解決方案。
| Specifications | |
| Material | BK7 |
| Dimension Tolerance | +0.0/-0.2mm |
| Thickness Tolerance | ±0.2mm |
| Flatness | <2λ@632.8nm |
| Surface Quality | 60/40 scratch and dig |
| Parallelism | <3 arc minutes |
| Clear Aperture | >90% |
| Design Wavelength | 400-700nm |
| Coating | Metallic reflective coating |
| Coating Area | 0-270° |
| OD Tolerance | ±5% of OD Extremes |
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